--------------------------------------------------------------------------------
              THE BLACKROCK INSURED MUNICIPAL 2008 TERM TRUST INC.
                       SEMI-ANNUAL REPORT TO SHAREHOLDERS
                          REPORT OF INVESTMENT ADVISOR
--------------------------------------------------------------------------------

                                                                   July 31, 2002

Dear Shareholder:

      The  semi-annual  period ended June 30, 2002,  saw general  turmoil in the
equity markets. Bond markets,  particularly municipal securities, proved to be a
viable shelter from unstable economic  conditions and experienced strong inflows
throughout the period.  Municipal bonds outperformed  Treasuries returning 4.64%
versus 3.61%  respectively  as measured by the Lehman  Brothers  Municipal  Bond
Index* and the Lehman  Brothers  Treasury  Index** for the six months ended June
30, 2002.

      The first half of 2002 was markedly  different from the last six months of
2001, as the Federal  Reserve Board (the "Fed") left interest  rates  unchanged.
After a 225 basis  point  decline in  interest  rates  during the latter half of
2001,  and the  uncertainty  of the economic  recovery in the first half of this
year,  the Fed  remained  cautious  about  the  state of the  economy.  Fears of
inflation remained subdued,  allowing the Fed to remain on hold and maintain the
lowest interest rates in decades.

      The past six months  also saw a 20%  increase  in new  municipal  issuance
totaling  $162  billion,  as compared  to the same time  period last year.  Both
retail and institutional investment in municipals remained high and continued to
drive  performance  as  investors  sought  lower  volatility  alternatives  with
attractive  taxable  equivalent  yields.   While  economic  indicators  remained
positive  during  the  period,   the  instability  of  the  equity  and  capital
markets--as a result of corporate  governance  and accounting  issues,  fears of
renewed  terrorist  acts  and  geopolitical   instability--weighed  on  investor
confidence, an integral component of economic recovery.

      The  volatility,  which continues to be seen throughout all sectors of the
market,  can be  disconcerting  for investors.  We encourage you to consult with
your financial  advisor to help establish a strategy that best fits your overall
goals and risk tolerance.

      The semi-annual  report  includes a summary of market  conditions over the
last six months,  a review of the strategy  employed by your  Trust's  portfolio
managers,  the  Trust's  unaudited  financial  statements  and a listing  of the
portfolio's  holdings.  We thank you for your continued  confidence in BlackRock
and the opportunity to help you achieve your long-term investment goals.

Sincerely,


/s/ Laurence D. Fink                         /s/ Ralph L. Schlosstein


Laurence D. Fink                            Ralph L. Schlosstein
Chief Executive Officer                     President
BlackRock Advisors, Inc.                    BlackRock Advisors, Inc.

*    The Lehman Brothers Municipal Bond Index measures the performance of the
     investment grade long-term tax-exempt bond market. The Index is unmanaged
     and cannot be purchased directly.

**   The Lehman Brothers Treasury Index measures the performance of the public
     obligations of the U.S. Treasury. The Index is unmanaged and cannot be
     purchased directly.

                                        1


                                                                   July 31, 2002
Dear Shareholder:

     We are  pleased  to  present  the  unaudited  semi-annual  report  for  The
BlackRock  Insured  Municipal  2008 Term Trust Inc.  (the  "Trust")  for the six
months ended June 30, 2002. We would like to take this opportunity to review the
Trust's   stock  price  and  net  asset  value  (NAV)   performance,   summarize
developments in the fixed income markets and discuss recent portfolio management
activity.

     The Trust is a diversified  closed-end bond fund whose shares are traded on
the New York Stock  Exchange  under the symbol  "BRM".  The  Trust's  investment
objectives  are to provide  current  income that is exempt from regular  Federal
income tax and to return $15 per share (an amount  equal to the Trust's  initial
public  offering  price) to investors on or about  December 31, 2008.  The Trust
seeks to achieve these  objectives by investing in high credit quality ("AAA" or
insured to "AAA")  tax-exempt  general  obligation  and revenue  bonds issued by
city, county and state municipalities throughout the United States.

     The table below summarizes the changes in the Trust's share price and NAV:

--------------------------------------------------------------------------------
                         06/30/02       12/31/01    Change       High       Low
--------------------------------------------------------------------------------
  Share Price             $16.30         $15.70      3.82%      $16.30    $15.57
--------------------------------------------------------------------------------
  Net Asset Value (NAV)   $17.23         $16.80      2.56%      $17.23    $16.71
--------------------------------------------------------------------------------

THE FIXED INCOME MARKETS

     Economic performance was mixed during the semi-annual period ended June 30,
2002, as volatility and instability were prevalent throughout all sectors of the
market.  The U.S. economy showed signs of recovery,  but mixed economic data and
dismal  performance  in the equity  markets  caused a massive  unwinding  of Fed
tightening  expectations.  Structural  imbalances  in the  U.S.  economy  became
evident  and  the  effects  of  the  short-term  stimulus  post  September  11th
diminished,  causing the Fed to remain on hold and leave the Federal  Funds rate
unchanged at 1.75%. Positive economic data included a rise in first quarter 2002
GDP of 6.1%, the fastest rate in two years,  strong  manufacturing data, an 8.4%
rise in first  quarter  2002  productivity  and the  Consumer  Confidence  Index
advancing   from  year-end   levels.   Low  inventory   levels  should   support
manufacturing  data,  but we are  skeptical  about  the  continued  strength  of
consumer  demand,  which is  essential  to a sustained  economic  recovery.  The
long-term  sustainability  of the highly  leveraged  consumer  remains a pivotal
issue to the strength of the economic recovery.  Although fundamentals support a
recovery,  declining equities and a plummeting dollar continue to erode investor
confidence.  We remain uncertain that a near-term business  investment  recovery
will  materialize,  as pricing power remains weak. While second quarter weakness
may be  overstated,  the likely  outcome is one of several  quarters  of sub-par
growth in the 2.5%-3.0% range.

     Year-to-date, rates have fallen across the yield curve. The Treasury market
returned 3.61% during the period,  posting  exceptionally strong months in April
and June as risk aversion dominated the markets.  Over the course of the period,
the yield curve steepened in reaction to mixed economic data and a proliferation
of negative headlines in the corporate sector. Looking ahead, the budget surplus
of 2001 is unlikely to be sustained  due to anemic tax revenues and a sharp rise
in defense spending,  which should result in larger auction sizes.  However, the
allowable debt limit set by Congress will soon be reached,  possibly leading the
Treasury  to pursue  additional  methods  of  financing  until it can  return to
regular  auctions.  As of June 30, 2002, the 10-year Treasury was yielding 4.80%
versus 5.05% on December 31, 2001.

     On a tax-adjusted basis,  municipal bonds outperformed the taxable domestic
bond market for the semi-annual period ended June 30, 2002,  returning 7.55% (as
measured by the LEHMAN  MUNICIPAL  BOND INDEX at a tax bracket of 38.6%)  versus
3.79% for the LEHMAN  AGGREGATE  INDEX.  Retail  investment  has reached  record
highs, as investors  searched for a lower  volatility asset class providing high
after-tax  returns.  Institutional  demand has also remained strong and is being
fueled by increased profitability on the part of insurance companies, the search
for stable income and asset  allocation  trades away from segments of the market
experiencing  higher  volatility.  Over the  period,  strong  demand  was met by
significant new issuance as the first quarter of

                                        2



2002  posted a 10%  increase  over the same  period in 2001 and was the  largest
first quarter total on record.  Through June, new bond issuance remained robust,
bringing total year-to-date  issuance to nearly $170 billion,  and is on pace to
be the largest  issuance  year in history.  The  municipal  yield curve  remains
historically  steep, as the short end of the curve has  outperformed  Treasuries
over the recent  months  while  longer  maturities  performed in line with their
Treasury counterparts.

THE TRUST'S PORTFOLIO AND INVESTMENT STRATEGY

     The Trust's portfolio is actively managed to diversify  exposure to various
sectors,  issuers,  revenue sources and security types.  BlackRock's  investment
strategy  emphasizes  a  relative  value  approach,  which  allows  the Trust to
capitalize upon changing  market  conditions by rotating  municipal  sectors and
coupons.  Additionally,  the Trust  emphasizes  securities  whose maturity dates
match the termination date of the Trust.

     Over the period,  trading activity in the Trust remained relatively low, as
many of the  securities  in the Trust's  portfolio  continued to trade at prices
above where they were purchased.  As trading  activity that results in the Trust
realizing a capital gain could require a taxable  distribution as well as reduce
its  income  generating  capacity,  we  continue  to  believe  that  waiting  to
restructure  the  portfolio in a higher  interest rate  environment  is the most
prudent portfolio  management  strategy.  At present,  we are confident that the
Trust is on schedule to achieve its primary  investment  objective  of returning
$15  per  share  upon   termination   and  will  continue  to  seek   investment
opportunities in the municipal market.

     Additionally, the Trust employs leverage to enhance its income by borrowing
at short-term  municipal  rates and  investing  the proceeds in longer  maturity
issues that have higher  yields.  The degree to which the Trust can benefit from
its use of leverage  may affect its ability to pay high monthly  income.  At the
end of the period,  the Trust's leverage amount was  approximately  36% of total
assets.

     The following chart shows the Trust's asset composition:

                               SECTOR BREAKDOWN
--------------------------------------------------------------------------------
     SECTOR                               JUNE 30, 2002  DECEMBER 31, 2001
--------------------------------------------------------------------------------
City, County & State                            25%          23%
--------------------------------------------------------------------------------
Power                                           22%          22%
--------------------------------------------------------------------------------
Education                                       11%          12%
--------------------------------------------------------------------------------
Hospital                                        10%          10%
--------------------------------------------------------------------------------
Transportation                                   9%           8%
--------------------------------------------------------------------------------
Tax Revenue                                      7%           6%
--------------------------------------------------------------------------------
Lease Revenue                                    6%           6%
--------------------------------------------------------------------------------
Water & Sewer                                    4%           4%
--------------------------------------------------------------------------------
District                                         2%           5%
--------------------------------------------------------------------------------
Housing                                          2%           2%
--------------------------------------------------------------------------------
Industrial & Pollution Control                   2%           2%
--------------------------------------------------------------------------------

                                       3




     We look  forward to managing  the Trust to benefit  from the  opportunities
available in the fixed income markets and to meet its investment objectives.  We
thank you for your investment in The BlackRock Insured Municipal 2008 Term Trust
Inc.  Please feel free to contact our marketing  center at (800) 227-7BFM (7236)
if you have specific questions which were not addressed in this report.

Sincerely,


/s/ Robert S. Kapito                   /s/ Kevin M. Klingert


Robert S. Kapito                       Kevin M. Klingert
Vice Chairman and Portfolio Manager    Managing Director and Portfolio Manager
BlackRock Advisors, Inc.               BlackRock Advisors, Inc.

-------------------------------------------------------------------------------
              THE BLACKROCK INSURED MUNICIPAL 2008 TERM TRUST INC.
-------------------------------------------------------------------------------
  Symbol on New York Stock Exchange:                             BRM
--------------------------------------------------------------------------------
  Initial Offering Date:                                  September 18, 1992
-------------------------------------------------------------------------------
  Closing Share Price as of 6/30/02:                          $16.30
-------------------------------------------------------------------------------
  Net Asset Value as of 6/30/02:                              $17.23
--------------------------------------------------------------------------------
  Yield on Closing Share Price as of 6/30/02 ($16.30)(1):       4.88%
--------------------------------------------------------------------------------
  Current Monthly Distribution per Common Share(2):           $ 0.06625
-------------------------------------------------------------------------------
  Current Annualized Distribution per Common Share(2):        $ 0.79500
-------------------------------------------------------------------------------

(1)  Yield on closing share price is calculated by dividing the current
     annualized distribution per share by the closing share price.

(2)  The distribution is not constant and is subject to change.


                         PRIVACY PRINCIPLES OF THE TRUST

     The Trust is committed to maintaining  the privacy of  shareholders  and to
safeguarding its non-public personal  information.  The following information is
provided to help you understand  what personal  information  the Trust collects,
how we  protect  that  information  and why,  in  certain  cases,  we may  share
information with select other parties.

     Generally,  the Trust does not receive any non-public personal  information
relating to its shareholders, although certain nonpublic personal information of
its  shareholders may become available to the Trust. The Trust does not disclose
any  non-public   personal   information   about  its   shareholders  or  former
shareholders  to anyone,  except as permitted by law or as is necessary in order
to service shareholder accounts (for example, to a transfer agent or third party
administrator).

     The Trust restricts  access to non-public  personal  information  about the
shareholders  to BlackRock  employees  with a legitimate  business  need for the
information. The Trust maintains physical,  electronic and procedural safeguards
designed to protect the non-public personal information of its shareholders.

                                       4


-------------------------------------------------------------------------------
THE BLACKROCK INSURED MUNICIPAL 2008 TERM TRUST INC.
PORTFOLIO OF INVESTMENTS JUNE 30, 2002 (UNAUDITED)
-------------------------------------------------------------------------------



          PRINCIPAL
           AMOUNT                                                                             OPTION CALL     VALUE
RATING*     (000)                                  DESCRIPTION                                PROVISIONS+   (NOTE 1)
-----------------------------------------------------------------------------------------------------------------------
                                                                                                
                     LONG-TERM INVESTMENTS--156.7%
                     ALABAMA--1.7%
AAA       $ 6,555    Birmingham Jefferson Civic, Ctr. Auth., Ser. A, 4.25%, 1/01/09, FSA ..  No Opt. Call $ 6,764,695
AAA         1,905++  Mobile Impvt. Wt., Zero Coupon, 8/15/02, MBIA ........................       N/A       1,309,935
                                                                                                          -----------
                                                                                                            8,074,630
                                                                                                          -----------
                     ALASKA--0.9%
AAA         4,000    Anchorage Alaska, Ser. B, 3.75%, 7/01/09, MBIA ......................   No Opt. Call   4,007,200
                                                                                                          -----------
                     ARIZONA--1.8%
AAA         4,000    Chandler, GO, Zero Coupon, 7/01/08, FGIC ............................   No Opt. Call   3,205,840
AAA         1,000    Phoenix Str. & Hwy. Rev., 4.25%, 7/01/09, FGIC .......................  No Opt. Call   1,036,740
AAA         4,200    Pima Cnty. Str. & Hwy. Rev., 4.125%, 7/01/09, FGIC ..................    7/08 @ 101    4,322,136
                                                                                                          -----------
                                                                                                            8,564,716
                                                                                                          -----------
                     CALIFORNIA--0.4%
AAA         1,890    California Hlth. Fac. Fin. Auth. Rev., Marin Gen. Hosp.,
                       Ser. A, 5.75%, 8/01/09, FSA 8/03 @ 102 .............................                 1,979,813
                                                                                                          -----------
                     COLORADO--11.5%
AAA         2,000    E-470 Pub. Hwy. Auth. Rev., Ser. B, Zero Coupon, 9/01/11, MBIA ......   No Opt. Call   1,333,860
AAA        30,205++  Jefferson Cnty. Sch. Dist. No. R-001, GO, 6.25%, 12/15/02, AMBAC ....        N/A      31,170,956
AAA         6,965    Regl. Transp. Dist., COP, Trans. Vehicles Proj.,
                       Ser. A, 5.00%, 6/01/08, MBIA ......................................    6/07 @ 101    7,505,414
AAA        13,285++  Univ. of Colorado Hosp. Auth. Rev., Ser. A, 6.25%, 11/15/02, AMBAC ..        N/A      13,793,019
                                                                                                          -----------
                                                                                                           53,803,249
                                                                                                          -----------
                     DISTRICT OF COLUMBIA--4.1%
                     Dist. of Columbia, GO,
AAA           195      Ser. B, 5.50%, 6/01/09, FSA .......................................        ETM         217,105
AAA         2,605      Ser. B, 5.50%, 6/01/09, FSA .......................................   No Opt. Call   2,871,935
AAA        10,000      Ser. B-1, 5.50%, 6/01/08, AMBAC ...................................   No Opt. Call  10,990,700
AAA           320++    Ser. E, 5.875%, 6/01/03, MBIA .....................................        N/A         338,931
AAA         2,750      Ser. E, 5.875%, 6/01/08, MBIA .....................................        ETM       2,900,205
AAA         2,000    Dist. of Columbia, Hosp. Rev., Children's Hosp.,
                       Ser. A, 6.25%, 7/15/08, FGIC                                           9/02 @ 102    2,042,660
                                                                                                          -----------
                                                                                                           19,361,536
                                                                                                          -----------
                     FLORIDA--1.0%
AAA         2,280    Broward Cnty., COP, Florida Sch. Brd., Ser. B, 4.25%, 7/01/09, FSA ..   No Opt. Call   2,359,504
AAA         2,080    Tampa Fla. Wtr. & Swr. Rev., 5.50%, 10/01/08, FSA ...................   No Opt. Call   2,310,048
                                                                                                          -----------
                                                                                                            4,669,552
                                                                                                          -----------
                     GEORGIA--4.9%
AAA         7,000++  Atlanta, COP, Pretrial Det. Ctr., 6.25%, 12/01/02, MBIA .............        N/A       7,279,860
AAA         5,000    Georgia St., GO, Ser. E, 5.25%, 2/01/10 .............................   No Opt. Call   5,460,200
AAA        10,000    Monroe Cnty., PCR, Pwr. Co. Plant Vogtle Proj.,
                       4.20%, 1/01/12, AMBAC .............................................   No Opt. Call  10,287,600
                                                                                                          -----------
                                                                                                           23,027,660
                                                                                                          -----------
                     HAWAII--1.4%
AAA         6,510    Hawaii St., GO, Ser. CY, 4.00%, 2/01/09, FSA .........................  No Opt. Call   6,611,035
                                                                                                          -----------
                     ILLINOIS--13.2%
AAA        14,205    Chicago O'Hare Intl. Arprt. Rev., Ser. A, 6.25%, 1/01/08, MBIA .......   1/05 @ 102   15,465,978
AAA         3,105    Chicago Pub. Bldg. Comm. Bldg. Rev., Ser. A,
                       Zero Coupon, 1/01/07, MBIA .........................................       ETM       2,661,358
                     Chicago Sch. Fin. Auth., GO, Ser. A, FGIC,
AAA        13,000      6.25%, 6/01/07 .....................................................   8/02 @ 102   13,313,300
AAA         9,150      6.25%, 6/01/09 .....................................................   8/02 @ 102    9,370,515
Aaa         5,980    Cook Cnty. High Sch. Dist. No. 201, J. Sterling Morton Twnshp.,
                       Zero Coupon, 12/01/09, FGIC ........................................  No Opt. Call   4,403,134
AAA         8,985    Du Page Cnty. Fst. Presv. Dist., Zero Coupon, 11/01/08 ...............  No Opt. Call   7,025,551
Aaa         1,455    Kane & Du Page Cntys. Cmnty. Unit Sch., Dist. No. 303
                       St. Charles, Ser. A,  3.75%, 1/01/09, FSA .........................   No Opt. Call   1,453,181



                       See Notes to Financial Statements.

                                       5






---------------------------------------------------------------------------------------------------------------------
          PRINCIPAL
           AMOUNT                                                                             OPTION CALL     VALUE
RATING*     (000)                                  DESCRIPTION                                PROVISIONS+   (NOTE 1)
---------------------------------------------------------------------------------------------------------------------
                                                                                                


                     ILLINOIS--(CONTINUED)
                     Met. Pier & Expo. Auth. Ded. St. Tax Rev. Auth., Ser. A, FGIC,
AAA       $ 1,570      Zero Coupon, 6/15/08 ...............................................       ETM     $ 1,256,424
AAA         8,600      Zero Coupon, 6/15/08 ...............................................  No Opt. Call   6,823,498
                                                                                                          -----------
                                                                                                           61,772,939
                                                                                                          -----------
                     INDIANA--2.3%
                     Indiana Hlth. Fac. Fin. Auth., Hosp. Rev. & Impvt.,
                       Ancilla Sys. Inc., MBIA,
AAA         1,805++    Ser. A, 6.25%, 7/01/02 .............................................       N/A       1,841,100
AAA         3,860      Ser. A, 6.25%, 7/01/08 .............................................   8/02 @ 102    4,181,538
AAA         1,385++    Ser. B, 6.25%, 7/01/02 .............................................       N/A       1,412,700
AAA         2,965      Ser. B, 6.25%, 7/01/08 .............................................   8/02 @ 102    3,211,984
                                                                                                          -----------
                                                                                                           10,647,322
                                                                                                          -----------
                     IOWA--0.9%
AAA         4,195    Muscatine Elec. Rev., 5.00%, 1/01/08, FSA ...........................    8/02 @ 100    4,229,902
                                                                                                          -----------
                     KANSAS--0.2%
AAA         1,000    Kansas St. Dev. Fin. Auth. Rev., Pub. Wtr.
                       Sply., 4.00%, 4/01/09, AMBAC ......................................  No Opt. Call    1,017,060
                                                                                                          -----------
                     KENTUCKY--0.7%
AAA         3,890    Owensboro Elec. Lt. & Pwr. Rev., Ser. B,
                       Zero Coupon, 1/01/09, AMBAC .......................................  No Opt. Call    3,004,830
                                                                                                          -----------
                     LOUISIANA--1.1%
AAA         5,000++  Louisiana Pub. Fac. Auth. Hosp. Rev., Lafayette Gen. Med. Ctr. Proj.,
                       6.30%, 10/01/02, FSA ..............................................        N/A       5,160,350
                                                                                                          -----------
                     MASSACHUSETTS--4.6%
AAA         4,465++  Chelsea Sch. Proj. Loan, 6.00%, 6/15/04, AMBAC ......................        N/A       4,896,185
                     Massachusetts Bay Trans. Auth. Rev., Ser. B, MBIA,
AAA           200++    6.00%, 3/01/03 ....................................................        N/A         209,896
AAA         5,800      6.00%, 3/01/10 ....................................................    3/03 @ 102    6,063,204
AAA        10,000    Massachusetts St. Hsg. Fin. Agcy. Hsg. Proj.,
                       Ser. A, 5.95%, 10/01/08, AMBAC ....................................    4/03 @ 102   10,331,400
                                                                                                          -----------
                                                                                                           21,500,685
                                                                                                          -----------
                     MICHIGAN--5.0%
                     Lake Orion, Cmnty. Sch. Dist., AMBAC,
AAA         3,290++    6.60%, 5/01/05 ....................................................        N/A       3,701,053
AAA         3,285++    6.70%, 5/01/05 ....................................................        N/A       3,704,363
AAA         8,920++  Michigan St. Bldg. Auth. Rev., Fac. Proj.,
                       Ser. IIA, 6.25%, 10/01/02, AMBAC ..................................        N/A       9,206,599
AAA         3,000    Michigan St. Trunk Line, Ser. A, 4.125%, 11/01/08, FSA ..............   No Opt. Call   3,108,630
AAA         3,400    Wyandotte, Elec. Rev., 6.25%, 10/01/08, MBIA ........................   No Opt. Call   3,831,086
                                                                                                          -----------
                                                                                                           23,551,731
                                                                                                          -----------
                     MISSOURI--1.6%
AAA         7,255    Kansas City, Sch. Dist. Bldg. Corp. Leasehold Rev., Cap. Impvts. Proj.,
                       Ser. A, 6.50%, 2/01/08, FGIC ......................................    7/02 @ 102    7,336,981
                                                                                                          -----------
                     NEVADA--3.1%
                     Director St. Dept. Business & Ind. Rev. Las Vegas Monorail Proj., AMBAC,
AAA         2,085      Zero Coupon, 1/01/09 ..............................................   No Opt. Call   1,589,124
AAA         3,585      Zero Coupon, 1/01/10 ..............................................   No Opt. Call   2,582,706
                     Washoe Cnty. Arpt. Auth., Sys. Impvt. Rev., Ser. B, MBIA,
AAA         3,135      5.70%, 7/01/07 ....................................................    7/03 @ 102    3,283,129
AAA         2,645      5.75%, 7/01/08 ....................................................    7/03 @ 102    2,778,520
AAA         4,135++  Washoe Cnty. Sch. Dist., GO, Ser. A, 6.20%, 10/01/02, AMBAC .........        N/A       4,225,887
                                                                                                          -----------
                                                                                                           14,459,366
                                                                                                          -----------
                     NEW JERSEY--12.9%
AAA        30,275++  New Jersey Econ. Dev. Auth., Mkt. Trans. Fac. Rev.,
                       Ser. A, 5.80%, 7/01/04, MBIA ......................................        N/A      33,114,189
AAA         1,750    New Jersey St. Transp. Trust Fund Auth., Transp. Sys., Ser. C,
                       5.25%, 12/15/08, AMBAC ............................................   No Opt. Call   1,929,603



                       See Notes to Financial Statements.


                                        6







---------------------------------------------------------------------------------------------------------------------
          PRINCIPAL
           AMOUNT                                                                             OPTION CALL     VALUE
RATING*     (000)                                  DESCRIPTION                                PROVISIONS+   (NOTE 1)
---------------------------------------------------------------------------------------------------------------------
                                                                                                
                     NEW JERSEY (CONTINUED)
                     New Jersey St., GO, Ser. D, MBIA,
AAA       $ 8,370++    6.00%, 2/15/03 ....................................................        N/A     $ 8,766,068
AAA        16,125      6.00%, 2/15/09 ....................................................    2/03 @ 102   16,834,500
                                                                                                          -----------
                                                                                                           60,644,360
                                                                                                          -----------
                     NEW MEXICO--0.7%
AAA         3,385    New Mexico Fin. Auth. Rev., Pub. Proj. Ser. A, 3.80%, 6/01/08 .......   No Opt. Call   3,432,695
                                                                                                          -----------
                     NEW YORK--12.5%
                     New York City, GO, MBIA,
AAA         5,000      Ser. E, 6.125%, 8/01/06 ...........................................   No Opt. Call   5,605,450
AAA        15,500      Ser. E, 6.20%, 8/01/07 ............................................   No Opt. Call  17,635,745
AAA         5,000      Ser. G, 5.75%, 2/01/08 ............................................   2/06 @ 101.5   5,423,700
                     New York St. Env. Fac. Corp., Ser. D, PCR,
AAA         5,945      6.50%, 5/15/07 ....................................................    11/04 @ 102   6,591,281
AAA         2,245      6.50%, 11/15/07 ...................................................    11/04 @ 102   2,489,054
AAA        15,915    New York St., GO, Ser. F, 5.25%, 9/15/09, MBIA                           9/08 @ 101   17,404,326
AAA         3,395    New York St. Thruway Auth. Svc. Contract Rev.,
                       Local Hwy. & Brdg., Ser. A, 5.40%, 1/01/09, MBIA ...................   1/05 @ 102    3,599,990
                                                                                                          -----------
                                                                                                           58,749,546
                                                                                                          -----------
                     NORTH CAROLINA--8.4%
AAA         1,000++  Cumberland Cnty., COP, Civic Ctr. Proj.,
                       Ser. A, 6.375%, 12/01/04, AMBAC ...................................        N/A       1,122,790
                     North Carolina Eastn. Mun. Pwr. Agcy. Sys. Rev., Ser. B,
AAA        13,500      6.125%, 1/01/09, FGIC .............................................   No Opt. Call  15,349,365
AAA         5,000      7.00%, 1/01/08, CAPMAC ............................................   No Opt. Call   5,845,250
AAA        14,675      7.25%, 1/01/07, CAPMAC ............................................   No Opt. Call  17,086,249
                                                                                                          -----------
                                                                                                           39,403,654
                                                                                                          -----------
                     OHIO--2.2%
AAA         2,410++  Cleveland, GO, 6.40%, 11/15/04, MBIA ................................        N/A       2,701,634
AAA         6,095    Hamilton City, Elec. Sys. Rev., Ser. A, 6.125%, 10/15/08, FGIC ......    10/02 @ 102   6,286,566
AAA         1,000++  Ohio St. Bldg. Auth. Fac. Rev., Juvenile Correctional
                       Proj., 6.50%, 10/01/04, AMBAC .....................................        N/A       1,118,080
                                                                                                          -----------
                                                                                                           10,106,280
                                                                                                          -----------
                     OREGON--1.1%
AAA         2,905    Oregon St. Dept. Admin. Svcs., COP,
                       Ser. A, 5.00%, 11/01/08, FSA .......................................   No Opt. Call  3,102,395
Aaa         2,000    Washington & Clackamas Cntys. Sch. Dist. No. 23,
                       GO, 3.75%, 6/15/08, MBIA ..........................................    No Opt. Call  2,033,820
                                                                                                          -----------
                                                                                                            5,136,215
                                                                                                          -----------
                     PENNSYLVANIA--13.0%
AAA         4,000    Allegheny Cnty. Hosp. Dev. Auth. Rev., Magee Women's Hosp.,
                       6.25%, 10/01/08, FGIC 10/02 @ 102                                                    4,119,040
                     Dauphin Cnty. Gen. Auth. Hosp. Rev., HAPSCO-Western
                       Pennsylvania Hosp. Proj., MBIA,
AAA         5,000      6.25%, 7/01/08 ....................................................        ETM       5,540,200
AAA        10,000      6.25%, 7/01/08 ....................................................    8/02 @ 102   10,208,600
AAA         6,600    Erie Cnty. Hosp. Auth. Rev., St. Vincent Hlth. Ctr. Proj.,
                       Ser. A, 6.25%, 7/01/08, MBIA ......................................    8/02 @ 102    6,753,912
AAA         3,500    Indiana Cnty. Indl. Dev. Auth. PCR, New York St. Elec. & Gas Corp.,
                       Ser. A, 6.00%, 6/01/06, MBIA ......................................    No Opt. Call  3,898,335
AAA         6,500    Pennsylvania Hsg. Fin. Agcy. Rev., Rental Hsg.,
                       Ser. C, 6.25%, 7/01/07, FNMA ......................................    7/02 @ 102    6,649,630
                     Pennsylvania St., Dept. Gen. Svcs., COP, FSA,
AAA         2,075      4.50%, 5/01/08 ....................................................   No Opt. Call   2,185,328
AAA         2,120      4.50%, 11/01/08 ...................................................   No Opt. Call   2,241,603
AAA         2,165      4.50%, 5/01/09 ....................................................   No Opt. Call   2,272,535
AAA         2,220      4.50%, 11/01/09 ...................................................   No Opt. Call   2,337,505
AAA         3,175    Philadelphia, GO, 4.10%, 9/15/08, FSA ...............................   No Opt. Call   3,283,426
AAA        10,930++  Pittsburgh, GO, Ser. D, 6.00%, 9/01/02, AMBAC .......................        N/A      11,230,247
                                                                                                          -----------
                                                                                                           60,720,361
                                                                                                          -----------



                       See Notes to Financial Statements.




                                       7





----------------------------------------------------------------------------------------------------------------------
          PRINCIPAL
           AMOUNT                                                                             OPTION CALL     VALUE
RATING*     (000)                                  DESCRIPTION                                PROVISIONS+   (NOTE 1)
----------------------------------------------------------------------------------------------------------------------
                                                                                                
                     TENNESSEE--0.2%
Aaa       $ 1,000    Clarksville Wtr., Swr. & Gas Rev., 4.30%, 2/01/09, FSA ...............  No Opt. Call $ 1,035,840
                                                                                                          -----------
                     TEXAS--23.6%
AAA        13,000++  Austin Pub. Impvt., GO, AMBAC, 6.10%, 9/01/02 ........................       N/A      13,100,880
                     Austin Util. Sys. Rev.,
AAA        11,515      Ser. A, Zero Coupon, 11/15/08, MBIA ................................  No Opt. Call   8,962,124
AAA         5,000      Ser. A, Zero Coupon, 11/15/09, AMBAC ...............................  No Opt. Call   3,669,650
AAA         5,000      Ser. A, Zero Coupon, 11/15/09, MBIA ................................  No Opt. Call   3,669,650
AAA         7,000      6.25%, 11/15/08, AMBAC .............................................   11/02 @ 102   7,246,890
AAA         5,000      6.625%, 11/15/08, AMBAC ............................................  No Opt. Call   5,875,200
                     Coppell Indpt. Sch. Dist., MBIA,
AAA         1,430      6.10%, 8/15/09 .....................................................       ETM       1,655,697
AAA         2,495      6.10%, 8/15/09 .....................................................   8/02 @ 100    2,506,926
AAA         4,390    Houston Indpt. Sch. Dist., Zero Coupon, 8/15/09, AMBAC ...............  No Opt. Call   3,255,844
AAA        16,135    Houston Wtr. & Swr. Sys. Rev., Jr. Lien,
                       Ser. C, 6.25%, 12/01/09, MBIA .....................................   12/02 @ 102   16,778,625
AAA         6,000    San Antonio Elec. & Gas Rev., Ser. B, Zero Coupon, 2/01/10, FGIC .....       ETM       4,355,520
                     Texas Mun. Pwr. Agcy. Rev.,
AAA           590      Zero Coupon, 9/01/08, AMBAC ........................................       ETM         468,437
AAA        14,410      Zero Coupon, 9/01/08, AMBAC ........................................  No Opt. Call  11,306,086
AAA           630      Zero Coupon, 9/01/09, AMBAC ........................................       ETM         475,089
AAA        15,545      Zero Coupon, 9/01/09, AMBAC ........................................  No Opt. Call  11,507,497
AAA         7,000      5.00%, 9/01/10, FGIC ...............................................   9/04 @ 100    7,156,310
AAA         5,900    Texas St. Pub. Fin. Auth. Bldg. Rev.,
                       Ser. B, 6.25%, 2/01/09, AMBAC ......................................  No Opt. Call   6,759,984
AAA         2,275    Ysleta Indpt. Sch. Dist. GO, Zero Coupon, 8/15/08, PSFG ..............  No Opt. Call   1,788,082
                                                                                                          -----------
                                                                                                          110,538,491
                                                                                                          -----------
                     UTAH--3.5%
                     Intermountain Pwr. Agcy. Pwr. Supply Rev., Ser. B, MBIA,
AAA         2,215      6.00%, 7/01/07 .....................................................       ETM       2,503,548
AAA         1,285      6.00%, 7/01/07 .....................................................  No Opt. Call   1,444,468
AAA         1,550++  Salt Lake Cnty. Mun. Bldg. Auth. Lease Rev.,
                       Ser. A, 6.05%, 10/01/04, MBIA .....................................        N/A       1,701,156
AAA        10,300    Utah St., GO, Ser. F, 5.00%, 7/01/10 .................................   7/07 @ 100   10,849,402
                                                                                                          -----------
                                                                                                           16,498,574
                                                                                                          -----------
                     WASHINGTON--14.0%
AAA        12,850    King Cnty., GO, Ser. D, 5.55%, 12/01/08, MBIA ........................   12/07 @ 102  14,326,722
                     Snohomish Cnty. Sch. Dist., GO, MBIA,
AAA         2,235++    6.10%, 12/01/03 ....................................................       N/A       2,413,509
AAA         1,765      6.10%, 12/01/08 ....................................................   12/03 @ 102   1,896,369
                     Washington St. Hlth. Care Fac. Auth. Rev., MBIA,
AAA         1,010      Catholic Hlth. Initiatives A, 5.30%, 12/01/08 ......................  No Opt. Call   1,105,617
AAA         1,000      Catholic Hlth. Initiatives A, 5.40%, 12/01/10 ......................   6/10 @ 101    1,098,370
AAA         9,000      Virginia Mason Oblig. Group, 6.30%, 2/15/09 ........................   2/03 @ 102    9,399,240
                     Washington St. Pub. Pwr. Supply Sys. Rev.,
AAA         3,000      Nuclear Proj. No. 2, 5.55%, 7/01/10, FGIC ..........................   7/03 @ 102    3,105,570
AAA        13,635      Nuclear Proj. No. 2, Ser. A, 6.25%, 7/01/09, MBIA ..................  No Opt. Call  13,907,700
AAA         5,550      Nuclear Proj. No. 3, Zero Coupon, 7/01/07, BIGI ....................  No Opt. Call   4,623,539
AAA         2,000      Nuclear Proj. No. 3, Zero Coupon, 7/01/08, BIGI ....................  No Opt. Call   1,576,680
AAA        11,000      Ser. A, 5.80%, 7/01/07, FSA ........................................  No Opt. Call  12,237,610
                                                                                                          -----------
                                                                                                           65,690,926
                                                                                                          -----------
                     WEST VIRGINIA--2.9%
AAA         1,550    West Virginia Econ. Dev. Auth. Rev., Correctional Juvenile & Pub., Ser. A,
                       4.25%, 6/01/08, MBIA ...............................................  No Opt. Call   1,600,406
AAA        11,600    West Virginia St. Pkwys. Econ. Dev. & Tourism Auth.,
                       5.70%, 5/15/09, FGIC ..............................................    5/03 @ 102   12,181,160
                                                                                                          -----------
                                                                                                           13,781,566
                                                                                                          -----------
                     WISCONSIN--1.3%
AAA         6,080    Wisconsin St., GO, Ser. C, 4.00%, 5/01/09, MBIA .....................   No Opt. Call   6,166,640
                                                                                                          -----------
                     TOTAL LONG-TERM INVESTMENTS (COST $682,768,511)                                      734,685,705
                                                                                                          -----------





                       See Notes to Financial Statements.

                                       8





----------------------------------------------------------------------------------------------------------------------
          Principal
           Amount                                                                             Option Call     Value
Rating*     (000)                                  Description                                Provisions+   (Note 1)
---------------------------------------------------------------------------------------------------------------------
                                                                                                


                     SHORT-TERM INVESTMENTS**--0.4%
                     CALIFORNIA--0.4%
A-1          $800    Orange Cnty. Spec. Fin. Auth., Teeter Plan Rev.,
                       Ser. D, 1.15%, 7/03/02, AMBAC, FRDD ...............................        N/A       $ 800,000
VMIG1         890    Santa Clara Elec. Rev., Ser. A, 1.10%, 7/04/02, AMBAC, FRDD .........        N/A         890,000
                                                                                                        -------------
                     TOTAL SHORT-TERM INVESTMENTS (COST $1,690,000) ......................                  1,690,000
                                                                                                        -------------
                     TOTAL INVESTMENTS--157.1% (COST $684,458,511) .......................                736,375,705
                     Other assets in excess of liabilities--0.7% .........................                  3,449,275
                     Preferred shares at redemption value, including
                       dividends payable--(57.8)% ........................................               (271,094,532)
                                                                                                        -------------
                     Net Assets Applicable to Common Shareholders--100% ...................             $ 468,730,448
                                                                                                        =============


----------------

 *  Using the higher of Standard & Poor's, Moody's or Fitch's rating.

**  For  purposes  of  amortized  cost  valuation,  the  maturity  date of these
    instruments  is  considered  to be the earlier of the next date on which the
    security  can be  redeemed  at par,  or the next  date on which  the rate of
    interest is adjusted.

 +  Date  (month/year)  and prices of the earliest  optional call or redemption.
    There may be other call provisions at varying prices at later dates.

++  This bond is prefunded. See Glossary for definition.



-----------------------------------------------------------------------------------------------------------
                          KEY TO ABBREVIATIONS
                                                       
AMBAC  -- American Municipal Bond Assurance Corporation   FRDD -- Floating Rate Daily Demand
BIGI   -- Bond Investors Guaranty Insurance Company       FSA  -- Financial Security Assurance
CAPMAC -- Capital Markets Assurance Company               GO   -- General  Obligation
COP    -- Certificate of  Participation                   MBIA -- Municipal Bond Insurance  Association
ETM    -- Escrowed  to  Maturity                          PCR  --  Pollution  Control  Revenue
FGIC   -- Financial  Guaranty Insurance Company           PSFG -- Permanent School Fund Guaranty
FNMA   -- Federal National Mortgage Association
-----------------------------------------------------------------------------------------------------------


                       See Notes to Financial Statements.

                                        9


-------------------------------------------------------------------------------
THE BLACKROCK INSURED
MUNICIPAL 2008 TERM TRUST INC.
STATEMENT OF ASSETS AND LIABILITIES
JUNE 30, 2002 (UNAUDITED)
-------------------------------------------------------------------------------


ASSETS
Investments, at value (cost $684,458,511) (Note 1) ...........      $736,375,705
Cash .........................................................           518,558
Interest receivable ..........................................        10,673,691
Other assets .................................................            79,447
                                                                    ------------
                                                                     747,647,401
                                                                    ------------

LIABILITIES
Dividends payable--common shares .............................         1,802,470
Payable for securities purchased .............................         5,561,239
Investment advisory fee payable (Note 2) .....................           212,300
Administration fee payable (Note 2) ..........................            60,657
Deferred Directors fees (Note 1) .............................            53,466
Other accrued expenses .......................................           132,289
                                                                    ------------
                                                                       7,822,421
                                                                    ------------

PREFERRED SHARES AT REDEMPTION VALUE
$.01 par value per share and $25,000 liquidation
  value per share applicable to 10,840 shares,
  including dividends payable (Note 1 & 4) ...................       271,094,532
                                                                    ------------

NET ASSETS APPLICABLE TO
COMMON SHAREHOLDERS ..........................................      $468,730,448
                                                                    ============
Composition of Net Assets Applicable to
  Common Shareholders:
  Par value (Note 4) .........................................      $    272,071
  Paid-in capital in excess of par ...........................       377,589,494
  Undistributed net investment income (Note 1) ...............        38,497,331
  Accumulated net realized gain ..............................           454,358
  Net unrealized appreciation (Note 1) .......................        51,917,194
                                                                    ------------
Net assets applicable to common shareholders,
  June 30, 2002 ..............................................      $468,730,448
                                                                    ============
Net asset value per common share:
  ($468,730,448 / 27,207,093 shares of
  common stock issued and outstanding) .......................            $17.23
                                                                          ======



-------------------------------------------------------------------------------
THE BLACKROCK INSURED
MUNICIPAL 2008 TERM TRUST INC.
STATEMENT OF OPERATIONS
SIX MONTHS ENDED JUNE 30, 2002 (UNAUDITED)
-------------------------------------------------------------------------------


NET INVESTMENT INCOME
Income
  Interest (Note 1) ......................................         $ 19,950,899
                                                                   ------------
Expenses
  Investment advisory ....................................            1,273,746
Administration ...........................................              363,927
  Auction agent ..........................................              355,941
  Custodian ..............................................               78,812
  Reports to shareholders ................................               38,642
  Directors ..............................................               38,581
  Legal ..................................................               25,769
  Independent accountants ................................               25,201
  Registration ...........................................               15,621
  Transfer agent .........................................               13,783
  Miscellaneous ..........................................               11,927
                                                                   ------------
    Total expenses .......................................            2,241,950
  Less fees paid indirectly (Note 2) .....................               (8,799)
                                                                   ------------
  Net expenses ...........................................            2,233,151
                                                                   ------------
Net investment income ....................................           17,717,748
                                                                   ------------

REALIZED AND UNREALIZED GAIN
ON INVESTMENTS
Net realized gain on investments .........................              764,883
Net change in unrealized appreciation
  on investments .........................................            5,829,742
                                                                   ------------
Net gain on investments ..................................            6,594,625
                                                                   ------------

DIVIDENDS TO PREFERRED SHAREHOLDERS
FROM NET INVESTMENT INCOME ...............................           (1,837,134)
                                                                   ------------

NET INCREASE IN NET ASSETS APPLICABLE
TO COMMON SHAREHOLDERS
RESULTING FROM OPERATIONS ................................         $ 22,475,239
                                                                   ============

                       See Notes to Financial Statements.

                                       10


-------------------------------------------------------------------------------
THE BLACKROCK INSURED MUNICIPAL 2008 TERM TRUST INC.
STATEMENTS OF CHANGES IN NET ASSETS (UNAUDITED)
-------------------------------------------------------------------------------



                                                                                                   SIX MONTHS        YEAR ENDED
                                                                                                      ENDED         DECEMBER 31,
                                                                                                  JUNE 30, 2002        2001(1)
                                                                                                  -------------     ------------
                                                                                                             

INCREASE (DECREASE) IN NET ASSETS APPLICABLE TO COMMON SHAREHOLDERS:

OPERATIONS:
  Net investment income ..................................................................       $  17,717,748        $  36,198,617
  Net realized gain on investments .......................................................             764,883              188,050
  Net change in unrealized appreciation (depreciation) on investments ....................           5,829,742           (2,296,483)
  Dividends to preferred shareholders from net investment income .........................          (1,837,134)          (7,367,624)
  Distributions to preferred shareholders from net realized gain on investments ..........                --                (50,283)
                                                                                                 -------------        -------------
    Net increase in net assets resulting from operations .................................          22,475,239           26,672,277
                                                                                                 -------------        -------------

DIVIDENDS AND DISTRIBUTIONS TO COMMON SHAREHOLDERS:
  FROM NET INVESTMENT INCOME .............................................................         (10,814,538)         (21,642,306)
  From net realized gain on investments ..................................................                --               (125,534)
                                                                                                 -------------        -------------
    Total dividends and distributions ....................................................         (10,814,538)         (21,767,840)
                                                                                                 -------------        -------------

CAPITAL SHARE TRANSACTIONS:
  Unused offering costs relating to issuance of preferred shares .........................                --                107,874
                                                                                                 -------------        -------------
    Total increase .......................................................................          11,660,701            5,012,311
                                                                                                 -------------        -------------

NET ASSETS APPLICABLE TO COMMON SHAREHOLDERS
Beginning of period ......................................................................         457,069,747          452,057,436
                                                                                                 -------------        -------------
End of period (including undistributed net investment income of
  $38,497,331 and $33,431,255, respectively) .............................................       $ 468,730,448        $ 457,069,747
                                                                                                 =============        =============


------------
(1) Prior year  amounts  have been  restated to conform to the current  period's
    presentation under the provisions of EITF D-98 (Note 1).


                       See Notes to Financial Statements.



                                       11


--------------------------------------------------------------------------------
THE BLACKROCK INSURED MUNICIPAL 2008 TERM TRUST INC.
FINANCIAL HIGHLIGHTS (UNAUDITED)
--------------------------------------------------------------------------------




                                                            SIX MONTHS ENDED,               YEAR ENDED DECEMBER 31,(1)
                                                             JUNE 30, 2002  ------------------------------------------------------
                                                                            2001        2000     1999         1998        1997
                                                            --------------  ----     --------- --------    ---------   ---------
                                                                                                           

PER COMMON SHARE OPERATING PERFORMANCE:
Net asset value, beginning of the period(2)................ $  16.80    $  16.62     $  16.00  $  17.06    $   16.80   $   15.90
                                                            --------    --------     --------  --------    ---------   ---------
Investment operations:
  Net investment income(3) ................................     0.65        1.33         1.30      1.21         1.20        1.18
  Net realized and unrealized gain (loss) on investments(3)     0.25       (0.08)        0.54     (1.23)        0.11
                                                                                                                            0.78
Dividends and distributions to preferred shareholders from:
  Net investment income ...................................    (0.07)      (0.27)       (0.38)    (0.24)       (0.25)      (0.27)
  Net realized gain on investments ........................     --          0.00(4)      --        --           --          --
  In excess of net realized gain on investments ...........     --            --         --        --           0.00(5)     0.00(5)
                                                            --------    --------     --------  --------    ---------   ---------
Net increase (decrease) from investment operations ........     0.83        0.98         1.46     (0.26)        1.06        1.69
                                                            --------    --------     --------  --------    ---------   ---------
Dividends and distributions to common shareholders from:
  Net investment income ...................................    (0.40)      (0.80)       (0.80)    (0.80)       (0.80)      (0.79)
  Net realized gain on investments ........................     --          0.00(4)      --        --           --          --
  In excess of net realized gain on investments ...........     --          --           --        --          0.00(5)      0.00(5)
                                                            --------    --------     --------  --------    ---------   ---------
Total dividends and distributions .........................    (0.40)      (0.80)       (0.80)    (0.80)       (0.80)      (0.79)
                                                            --------    --------     --------  --------    ---------   ---------
Capital charge with respect to issuance of preferred shares     --          --          (0.04)       --          --          --
                                                            --------    --------     --------  --------    ---------   ---------
Net asset value, end of period(2).......................... $  17.23    $  16.80     $  16.62  $  16.00    $   17.06   $   16.80
                                                            ========    ========     ========  ========    =========   =========
Market value, end of period(2)............................. $  16.30    $  15.70     $  14.88  $  13.75    $   16.13   $   15.25
                                                            ========    ========     ========  ========    =========   =========
TOTAL INVESTMENT RETURN(6) ................................     6.43%      11.06%       14.40%   (10.14)%      11.21%      10.97%
                                                            ========    ========     ========  ========    =========   =========
RATIOS TO AVERAGE NET ASSETS OF COMMON
SHAREHOLDERS(7):
Expenses paid before fees paid indirectly .................   0.98%(8)      1.02%        1.05%     0.93%        0.88%       0.92%
Expenses after fees paid indirectly .......................   0.97%(8)      1.01%        1.05%     0.93%        0.88%       0.92%
Net investment income before preferred share dividends(3)..   7.72%(8)      7.87%        8.06%     7.30%        7.10%       7.19%
Preferred share dividends .................................   0.80%(8)      1.60%        2.40%     1.47%        1.49%       1.62%
Net investment income available to common shareholders(3)..   6.92%(8)      6.27%        5.66%     5.83%        5.61%       5.57%
SUPPLEMENTAL DATA:
Average net assets of common shareholders (000) ........... $462,887    $460,153     $438,958  $452,317    $ 458,993   $ 444,895
Portfolio turnover ........................................        5%          3%           3%        1%           0%         11%
Net assets of common shareholders, end of period (000) .... $468,730    $457,070     $452,057  $435,314    $ 464,236   $ 457,192
Preferred shares outstanding (000) ........................ $271,000    $271,000     $271,000  $206,000    $ 206,000   $ 206,000
Asset coverage per preferred share, end of period ......... $ 68,250    $ 67,178     $ 66,735  $ 77,857    $  81,361   $  80,508


----------

(1)  Prior periods have been restated to conform to the current period's
     presentation under the provision of EITF D-98 (Note 1).

(2)  Net asset value and market value are published in BARRON'S on Saturday and
     THE WALL STREET JOURNAL on Monday.


(3)  As required, January 1, 2001, the Trust adopted the provisions of the AICPA
     Audit and Accounting Guide for Investment Companies and began accreting
     market discount on debt securities. The effect of this accounting policy
     change had no impact on the total net assets of the Trust. Per share,
     ratios and supplement data for years prior to 2001 have not been restated
     to reflect this change.

(4)  Actual amount paid to common shareholders was $0.004614 for the year ended
     December 31, 2001. Actual amount paid to preferred shareholders was
     $0.001848 per common share for the year ended December 31, 2001.

(5)  Actual amount paid to common shareholders was $0.005235 and $0.004814 for
     the years ended December 31, 1998 and 1997, respectively. Actual amount
     paid to preferred shareholders was $0.001696 and $0.00154 per common share
     for the years ended December 31, 1998 and 1997, respectively.

(6)  Total investment return is calculated assuming a purchase of a common share
     at the current market price on the first day and a sale at the current
     market price on the last day of each period reported. Dividends and
     distributions, if any, are assumed for purposes of this calculation to be
     reinvested at prices obtained under the Trust's dividend reinvestment plan.
     Total investment return does not reflect brokerage commissions. Total
     investment returns for less than a full year are not annualized. Past
     performance is not a guarantee of future results.

(7)  Ratios are calculated on the basis of income and expenses applicable to
     both the common and preferred shares relative to the average net assets of
     common shareholders.

(8)  Annualized

The information above represents the unaudited operating  performance data for a
common share outstanding,  total investment return, ratios to average net assets
and other supplemental data for each period indicated. This information has been
determined based upon financial information provided in the financial statements
and market value data for the Trust's common shares.


                       See Notes to Financial Statements.


                                       12


-------------------------------------------------------------------------------
THE BLACKROCK INSURED
MUNICIPAL 2008 TERM TRUST INC.
NOTES TO FINANCIAL STATEMENTS (UNAUDITED)
-------------------------------------------------------------------------------

NOTE 1. ORGANIZATION & ACCOUNTING POLICIES

The  BlackRock  Insured  Municipal  2008 Term  Trust  Inc.  (the  "Trust"),  was
organized in Maryland on June 30, 1992 as a  diversified  closed-end  management
investment  company  under  the  Investment  Company  Act of 1940.  The  Trust's
investment  objectives are to provide current income exempt from regular Federal
income tax and to return $15 per share to  investors  on or about  December  31,
2008. The ability of issuers of debt  securities held by the Trust to meet their
obligations may be affected by economic developments in the specific industry or
region. No assurance can be given that the Trust's investment objectives will be
achieved.

The following is a summary of significant  accounting  policies  followed by the
Trust.

SECURITIES VALUATION:  Municipal securities  (including  commitments to purchase
such  securities  on a  "when-issued"  basis)  are valued on the basis of prices
provided by dealers or pricing  services  selected under the  supervision of the
Trust's Directors.  In determining the value of a particular  security,  pricing
services  may use  certain  information  with  respect to  transactions  in such
securities,  quotations  from bond dealers,  market  transactions  in comparable
securities and various relationships between securities.  Short-term investments
may be valued at amortized  cost.  Any securities or other assets for which such
current market  quotations are not readily available are valued at fair value as
determined in good faith under  procedures  established by and under the general
supervision and responsibility of the Trust's Board of Directors.

SECURITIES  TRANSACTIONS  AND INVESTMENT  INCOME:  Securities  transactions  are
recorded on trade date.  Realized and unrealized gains and losses are calculated
on the  identified  cost basis.  The Trust also  records  interest  income on an
accrual basis and amortizes  premium and accretes discount to interest income on
securities purchased using the interest method.

SEGREGATION:  In cases in which the  Investment  Company Act of 1940, as amended
and the interpretive positions of the Securities and Exchange Commission ("SEC")
require  that the  Trust  segregate  assets in  connection  with  certain  Trust
investments  (e.g., when issued  securities,  reverse  repurchase  agreements or
futures contracts), the Trust will, consistent with certain interpretive letters
issued by the SEC,  designate on its books and records cash or other liquid debt
securities  having a  market  value at least  equal  to the  amount  that  would
otherwise be required to be physically segregated.

FEDERAL  INCOME  TAXES:  It is the  Trust's  intention  to  continue to meet the
requirements  of the Internal  Revenue Code  applicable to regulated  investment
companies  and to distribute  sufficient  net income to  shareholders.  For this
reason and because  substantially  all of the Trust's  gross income  consists of
tax-exempt interest, no Federal income tax provision is required.

DIVIDENDS  AND  DISTRIBUTIONS:   The  Trust  declares  and  pays  dividends  and
distributions to common  shareholders  monthly,  from net investment income, net
realized short-term capital gains and other sources, if necessary. Net long-term
capital  gains,  if any,  in excess  of loss  carryforwards  may be  distributed
annually.  Dividends and  distributions  are recorded on the  ex-dividend  date.
Dividends and distributions to preferred shareholders are accrued and determined
as described in Note 4.

ESTIMATES: The preparation of financial statements in conformity with accounting
principles   generally  accepted  in  the  United  States  of  America  requires
management to make estimates and assumptions that affect the reported amounts of
assets and  liabilities  and disclosure of contingent  assets and liabilities at
the date of the financial  statements  and the reported  amounts of revenues and
expenses  during the reporting  period.  Actual  results could differ from these
estimates.

DEFERRED  COMPENSATION PLAN: Under a deferred  compensation plan approved by the
Board of Directors on February 24, 2000,  non-interested  Directors may elect to
defer receipt of all or a portion of their annual compensation.

   Deferred amounts earn a return as though  equivalent  dollar amounts had been
invested in common shares of other  BlackRock  Trusts selected by the Directors.
This has the same  economic  effect for the  Directors as if the  Directors  had
invested the deferred amounts in such other BlackRock Trusts.

   The  deferred  compensation  plan is not  funded and  obligations  thereunder
represent  general unsecured claims against the general assets of the Trust. The
Trust may, however, elect to invest in common shares of those Trusts selected by
the Directors in order to match its deferred compensation obligations.

CHANGE IN FINANCIAL  STATEMENT  CLASSIFICATION  FOR AMPS: In accordance with the
provisions  of  EITF  D-98,   "Classification   and  Measurement  of  Redeemable
Securities,"  effective for the current period,  the Trust has  reclassified its
Auction Market  Preferred Shares ("AMPS") outside of permanent equity in the net
assets  section  of the  Statement  of  Assets  and  Liabilities.  In  addition,
distributions  to AMPS  shareholders  are now  classified  as a component of net
assets  resulting from  operations on the Statement of Operations and Changes in
Net Assets and as a component  of the  investment  operations  in the  Financial
Highlights.  Prior year amounts  presented have been restated to conform to this
period's presentation. This change has no impact on the net assets applicable to
common shares of the Trust.


                                       13



NOTE 2. AGREEMENTS

The Trust has an Investment  Advisory Agreement with BlackRock  Advisors,  Inc.,
(the "Advisor"), a wholly owned subsidiary of BlackRock,  Inc., which in turn is
an indirect majority owned subsidiary of PNC Financial  Services Group, Inc. The
Trust has an Administration Agreement with Princeton  Administrators,  L.P. (the
"Administrator"),  an indirect  wholly owned  affiliate of Merrill  Lynch & Co.,
Inc.

   The  investment  advisory  fee paid to the  Advisor  is  computed  weekly and
payable  monthly at an annual  rate of 0.35% of the Trust's  average  weekly net
asset value.  The liquidation  value of any outstanding  preferred shares of the
Trust is not taken into  account in  determining  the  Trust's  weekly net asset
value.  The total  dollar  amounts  paid to the  Advisor by the Trust  under the
Investment  Advisory  Agreement  for the six months  ended June 30, 2002 and the
years  ended  December  31,  2001,  2000 and 1999 were  $1,273,746,  $2,559,177,
$2,449,544 and  $2,304,109,  respectively.  The  administration  fee paid to the
Administrator  is also computed  weekly and payable monthly at an annual rate of
0.10% of the Trust's  average  weekly net asset value.  The total dollar amounts
paid to the  Administrator by the Trust under the  Administration  Agreement for
the six months ended June 30, 2002 and the years ended  December 31, 2001,  2000
and 1999 were $363,927, $733,162, $699,870 and $658,317, respectively.

   Pursuant to the agreements,  the Advisor provides  continuous  supervision of
the investment  portfolio and pays the compensation of officers of the Trust who
are  affiliated  persons of the Advisor.  The  Administrator  pays occupancy and
certain  clerical and accounting  costs of the Trust.  The Trust bears all other
costs and  expenses,  which  include  reimbursements  to the Advisor for certain
operational support services provided to the Trust.

   Pursuant to the terms of the custody  agreement,  the Trust receives earnings
credits from its custodian when positive cash balances are maintained, which are
used to offset custody fees. The earnings  credits for the period ended June 30,
2002, were approximately $8,799.

NOTE 3. PORTFOLIO SECURITIES

Purchases and sales of investment securities, other than short-term investments,
for the six months ended June 30, 2002, aggregated  $41,146,941 and $37,729,600,
respectively.

   The Federal income tax basis of the Trust's  investments at June 30, 2002 was
$684,187,142,  and  accordingly,  net unrealized  appreciation  was  $52,188,563
(gross  unrealized  appreciation--$52,193,545,   gross  unrealized  depreciation
--$4,982).

NOTE 4. CAPITAL

There are 200 million common shares of $.01 par value authorized.  The Trust may
classify or  reclassify  any unissued  common  shares into one or more series of
preferred shares. Of the 27,207,093 common shares  outstanding at June 30, 2002,
the Advisor owned 7,093 shares. As of June 30, 2002, there were 10,840 preferred
shares  outstanding as follows:  Series T28--2,060,  Series  R28--2,060,  Series
T7--4,660, and Series R7--2,060. Dividends on Series T7 shares and R7 shares are
cumulative  at a rate  which is reset  every 7 days  based on the  results of an
auction.

     Dividends  on Series  T28 shares  are  cumulative  at a rate which is reset
every 28 days  based on the  results  of an  auction.  Series  R28  shares  paid
dividends  monthly at a rate established at the initial offering through May 17,
1994.  Thereafter,  rates on Series R28 shares  reset every 28 days based on the
results of an auction.  Dividend rates ranged from 1.00% to 1.85% during the six
months  ended June 30, 2002.

     The Trust may not declare  dividends or make other  distributions on common
shares  or  purchase  any  such  shares  if,  at the  time  of the  declaration,
distribution  or  purchase,  asset  coverage  with  respect  to the  outstanding
preferred stock would be less than 200%.

     The preferred shares are redeemable at the option of the Trust, in whole or
in part, on any dividend  payment date at $25,000 per share plus any accumulated
or unpaid  dividends  whether or not  declared.  The  preferred  shares are also
subject to mandatory  redemption  at $25,000 per share plus any  accumulated  or
unpaid dividends,  whether or not declared if certain  requirements  relating to
the  composition of the assets and  liabilities of the Trust as set forth in the
Articles of  Incorporation  are not satisfied.

     The holders of preferred  shares have voting rights equal to the holders of
common shares (one vote per share) and will vote together with holders of shares
of common stock as a single class. However, holders of preferred shares are also
entitled to elect two of the Trust's  Directors.  In  addition,  the  Investment
Company Act of 1940 requires that along with approval by stockholders that might
otherwise  be  required,  the  approval  of the  holders  of a  majority  of any
outstanding  preferred shares, voting separately as a class would be required to
(a) adopt any plan of  reorganization  that would adversely affect the preferred
shares, and (b) take any action requiring a vote of security holders, including,
among other  things,  changes in the Trust's  subclassification  as a closed-end
investment  company  or  changes  in its  fundamental  investment  restrictions.

NOTE 5. DIVIDENDS

Subsequent  to June 30, 2002,  the Board of  Directors  of the Trust  declared a
dividend of $0.06625 per common share payable, August 1, 2002 to shareholders of
record on July 15, 2002.  For the period July 1, 2002 to July 31, 2002 dividends
declared  on  preferred  shares  totaled  $314,271,  in  aggregate  for the four
outstanding preferred share series.

                                       14


-------------------------------------------------------------------------------
              THE BLACKROCK INSURED MUNICIPAL 2008 TERM TRUST INC.
                           DIVIDEND REINVESTMENT PLAN
-------------------------------------------------------------------------------

      Pursuant to the Trust's Dividend  Reinvestment  Plan (the "Plan"),  common
shareholders may elect to have all  distributions of dividends and capital gains
reinvested by EquiServe  Trust Company,  N.A. (the "Plan Agent") in Trust shares
pursuant  to the  Plan.  Shareholders  who do not  participate  in the Plan will
receive  all  distributions  in cash paid by check and  mailed  directly  to the
shareholders  of record (or if the  shares  are held in street or other  nominee
name, then to the nominee) by the Plan Agent.

      The Plan Agent serves as agent for the shareholders in  administering  the
Plan.  After the Trust  declares a dividend or determines to make a capital gain
distribution, the Plan Agent will acquire shares for the participants' accounts,
by  the  purchase  of  outstanding  shares  on the  open  market  ("open  market
purchases")  on the New York Stock  Exchange  or  elsewhere.  The Trust will not
issue any new shares under the Plan.

      Participants in the Plan may withdraw from the Plan upon written notice to
the Plan Agent and will receive  certificates  for whole Trust shares and a cash
payment for any fraction of a Trust share.

      The Plan Agent's fees for the  handling of the  reinvestment  of dividends
and distributions will be paid by the Trust.  However, each participant will pay
a pro rata share of  brokerage  commissions  incurred  with  respect to the Plan
Agent's open market  purchases.  The  automatic  reinvestment  of dividends  and
distributions  will not relieve  participants of any Federal income tax that may
be payable on such dividends or distributions.

      The Trust  reserves the right to amend or terminate the Plan.  There is no
direct service charge to participants in the Plan;  however,  the Trust reserves
the  right  to  amend  the Plan to  include  a  service  charge  payable  by the
participants.  All correspondence  concerning the Plan should be directed to the
Plan Agent at (800) 699-1BFM or 150 Royall Street, Canton, MA 02021.


                                       15



-------------------------------------------------------------------------------
              THE BLACKROCK INSURED MUNICIPAL 2008 TERM TRUST INC.
                             ADDITIONAL INFORMATION
-------------------------------------------------------------------------------

      There have been no material changes in the Trust's  investment  objectives
or policies that have not been approved by the shareholders or to its charter or
by-laws or in the  principal  risk factors  associated  with  investment  in the
Trust.  There have been no changes in the persons who are primarily  responsible
for the day-to-day management of the Trust's portfolio.

      Quarterly  performance  and other  information  regarding the Trust may be
found    on    BlackRock's     website,     which    can    be    accessed    at
http://www.blackrock.com/funds/cefunds.html.   This   reference  to  BlackRock's
website is intended to allow  investors  public access to quarterly  information
regarding the Trust and is not intended to incorporate  BlackRock's website into
this report.

The Annual  Meeting of Trust  Shareholders  was held May 23, 2002 to vote on the
following matter:

To elect three Directors as follows:

Directors:                           Class        Term          Expiring
-------                             ------        -----         --------
Andrew F. Brimmer ...............     III        3 years          2005
Kent Dixon ......................     III        3 years          2005
Laurence D. Fink* ...............     III        3 years          2005

Directors  whose term of office  continues  beyond  this  meeting are Richard E.
Cavanagh,  James Clayburn La Force, Jr., Frank J. Fabozzi, Walter F. Mondale and
Ralph Schlosstein.

Shareholders  elected  the three  Directors.  The  results of the voting were as
follows:

                                  Votes for**   Votes Against**  Abstentions**
                                  ----------     -------------   ------------
Andrew F. Brimmer ..............  26,269,920          --            322,235
Kent Dixon .....................  26,274,774          --            317,381
Laurence D. Fink* ..............  26,274,260          --            317,895

-----------

 *   Laurence D. Fink has resigned his positions as Director and Chairman of the
     Board  effective  August 22, 2002. The Board of Directors  elected Ralph L.
     Schlosstein  as the new  Chairman  of the Board,  and  appointed  Robert S.
     Kapito as the new President of the Trust and as a new Director of the Board
     effective August 22, 2002.

**   The votes represent  common and preferred  shareholders  voting as a single
     class.

      Certain  of the  officers  of the Trust  listed on the back  cover of this
Report to  Shareholders,  are also  officers of the  Advisor.  They serve in the
following  capacities  for the  Advisor:  Robert  S.  Kapito--Director  and Vice
Chairman,   Kevin   M.   Klingert--Director   and   Managing   Director,   Henry
Gabbay--Managing Director and Anne Ackerley--Managing Director.


                                       16



-------------------------------------------------------------------------------
              THE BLACKROCK INSURED MUNICIPAL 2008 TERM TRUST INC.
                               INVESTMENT SUMMARY
-------------------------------------------------------------------------------

THE TRUST'S INVESTMENT OBJECTIVE:

The BlackRock Insured Municipal 2008 Term Trust's  investment  objectives are to
provide  current income exempt from regular Federal income tax and to return $15
per share (the initial public offering price per share) to investors on or about
December 31, 2008.

WHO MANAGES THE TRUST?

BlackRock  Advisors,  Inc. (the "Advisor")  manages the Trust.  The Advisor is a
wholly owned subsidiary of BlackRock,  Inc.  ("BlackRock"),  which is one of the
largest  publicly traded  investment  management firms in the United States with
$250 billion of assets under management as of June 30, 2002.  BlackRock  manages
assets on behalf of institutional and individual  investors  worldwide through a
variety of equity, fixed income,  liquidity and alternative investment products,
including the BLACKROCK FUNDS and BLACKROCK  PROVIDENT  INSTITUTIONAL  FUNDS. In
addition, BlackRock provides risk management and investment system services to a
growing number of  institutional  investors under the BLACKROCK  SOLUTIONS name.
Clients are served from the Company's  headquarters in New York City, as well as
offices in Boston,  Edinburgh,  Hong Kong, San Francisco,  Tokyo and Wilmington.
BlackRock is a member of The PNC Financial  Services  Group (NYSE:  PNC), and is
majority-owned by PNC and by BlackRock employees.

WHAT CAN THE TRUST INVEST IN?

The Trust  intends to invest at least 80% of its total  assets in a  diversified
portfolio  of  municipal  obligations  insured as to the timely  payment of both
principal  and  interest.  The Trust may invest up to 20% of its total assets in
uninsured  municipal  obligations  which are rated  "Aaa" by Moody's or "AAA" by
S&P,  or are  determined  by the  Advisor  to be of  comparable  credit  quality
(guaranteed, escrowed or backed in trust).

WHAT IS THE ADVISOR'S INVESTMENT STRATEGY?

The Advisor will seek to meet the Trust's  investment  objective by managing the
assets of the Trust so as to return the initial  offering  price ($15 per share)
on or about  December 31, 2008.  The Advisor will implement a strategy that will
seek to  closely  match the  maturity  or call  provisions  of the assets of the
portfolio  with the future return of the initial  investment at the end of 2008.
At the Trust's  termination,  BlackRock expects that the value of the securities
which have matured,  combined with the value of the securities  that are sold or
called,  if any,  will be  sufficient  to return the initial  offering  price to
investors.  On a continuous basis, the Trust will seek its objective by actively
managing its portfolio of municipal  obligations  and retaining a portion of its
income each year.

In addition to seeking the return of the  initial  offering  price,  the Advisor
also seeks to provide  current income exempt from regular  Federal income tax to
investors.  The  portfolio  managers  will attempt to achieve this  objective by
investing in securities that provide competitive  income. In addition,  leverage
will be used to  enhance  the  income  of the  portfolio.  In order to  maintain
competitive  yields as the Trust  approaches  maturity  and  depending on market
conditions, the Advisor will attempt to purchase securities with call protection
or maturities as close to the Trust's maturity date as possible. Securities with
call  protection  should  provide the  portfolio  with some degree of protection
against reinvestment risk during times of lower prevailing interest rates. Since
the Trust's  primary goal is to return the initial  offering  price at maturity,
any cash that the Trust receives prior to its maturity date may be reinvested in
securities with maturities  which coincide with the remaining term of the Trust.
Since shorter-term  securities typically yield less than longer-term securities,
this strategy  will likely result in a decline in the Trust's  income over time.
It is  important  to note that the Trust will be managed so as to  preserve  the
integrity of the return of the initial  offering  price.  If market  conditions,
such as interest rate  volatility,  force a choice  between  current  income and
risking the return of the initial offering price, it is likely the return of the
initial offering price will be emphasized.


                                       17



HOW ARE THE TRUST'S  SHARES  PURCHASED  AND SOLD?  DOES THE TRUST PAY  DIVIDENDS
REGULARLY?

The  Trust's  common  shares  are traded on the New York  Stock  Exchange  which
provides investors with liquidity on a daily basis. Orders to buy or sell shares
of the Trust must be placed  through a registered  broker or financial  advisor.
The Trust pays monthly  dividends which are typically paid on the first business
day of the month. For shares held in the  shareholder's  name,  dividends may be
reinvested  in  additional  shares  of the Trust  through  its  transfer  agent,
EquiServe Trust Company,  N.A.  Investors who wish to hold shares in a brokerage
account  should check with their  financial  advisor to determine  whether their
brokerage firm offers dividend reinvestment services.

LEVERAGE CONSIDERATIONS IN THE TRUST

The Trust employs leverage  primarily  through the issuance of preferred shares.
Leverage permits the Trust to borrow money at short-term rates and reinvest that
money in longer-term  assets,  which typically offer higher interest rates.  The
difference  between the cost of the borrowed  funds and the income earned on the
proceeds  that are  invested in  longer-term  assets is the benefit to the Trust
from leverage.

Leverage  increases  the duration (or price  sensitivity  of the net assets with
respect  to change  in  interest  rates) of the  Trust,  which can  improve  the
performance of the Trust in a declining interest rate environment, but can cause
net assets to decline faster in a rapidly rising interest rate environment.  The
Advisor's  portfolio  managers  continuously  monitor and  regularly  review the
Trust's  use of  leverage  and the Trust may  reduce,  or unwind,  the amount of
leverage  employed should the Advisor  consider that reduction to be in the best
interests of the shareholders.

SPECIAL CONSIDERATIONS AND RISK FACTORS RELEVANT TO THE TRUST

THE TRUST IS  INTENDED  TO BE A  LONG-TERM  INVESTMENT  AND IS NOT A  SHORT-TERM
TRADING VEHICLE.

INVESTMENT  OBJECTIVES.  Although  the  objectives  of the Trust are to  provide
current  income  exempt from  regular  Federal  income tax and to return $15 per
share to investors on or about December 31, 2008, there can be no assurance that
these objectives will be achieved.

DIVIDEND  CONSIDERATIONS.  The income and dividends paid by the Trust are likely
to  decline  to some  extent  over the term of the Trust due to the  anticipated
shortening of the dollar-weighted average maturity of the Trust's assets.

LEVERAGE.  The Trust utilizes leverage through the issuance of preferred shares,
which involves  special risks.  The Trust's net asset value and market value may
be more volatile due to its use of leverage.

MARKET PRICE OF SHARES.  The shares of closed-end  investment  companies such as
the Trust trade on the New York Stock  Exchange  (NYSE symbol:  BRM) and as such
are subject to supply and demand influences.  As a result, shares may trade at a
discount or a premium to their net asset value.

MUNICIPAL  OBLIGATIONS.  The value of municipal debt securities generally varies
inversely with changes in prevailing  market  interest  rates.  Depending on the
amount of call  protection  that the securities in the Trust have, the Trust may
be subject to certain  reinvestment  risks in environments of declining interest
rates.

ILLIQUID  SECURITIES.  The Trust may  invest in  securities  that are  illiquid,
although  under current  market  conditions the Trust expects only to do so to a
limited extent. These securities involve special risks.

ANTITAKEOVER  PROVISIONS.  Certain antitakeover provisions will make a change in
the Trust's  business or management  more difficult  without the approval of the
Trust's Board of Directors and may have the effect of depriving  shareholders of
an  opportunity  to sell their shares at a premium above the  prevailing  market
price.

ALTERNATIVE  MINIMUM TAX (AMT).  The Trust may invest in  securities  subject to
alternative minimum tax.

                                       18




-------------------------------------------------------------------------------
              THE BLACKROCK INSURED MUNICIPAL 2008 TERM TRUST INC.
                                    GLOSSARY
-------------------------------------------------------------------------------


CLOSED-END FUND:    Investment  vehicle which initially offers a fixed number of
                    shares and trades on a stock exchange.  The Trust invests in
                    a portfolio  of  securities  in  accordance  with its stated
                    investment objectives and policies.

DISCOUNT:           When a Trust's  net asset  value is greater  than its market
                    price, the Trust is said to be trading at a discount.

DIVIDEND:           Income   generated  by   securities   in  a  portfolio   and
                    distributed to shareholders after the deduction of expenses.
                    The Trust declares and pays dividends to common shareholders
                    on a monthly basis.

DIVIDEND
REINVESTMENT:       Common shareholders may have all dividends and distributions
                    of capital gains  automatically  reinvested  into additional
                    shares of the Trust.

MARKET PRICE:       Price  per  share of a  security  trading  in the  secondary
                    market.  For a closed-end  Trust, this is the price at which
                    one share of the Trust trades on the stock exchange.  If you
                    were to buy or sell  shares,  you would pay or  receive  the
                    market price.

NET ASSET
VALUE (NAV):        Net asset value is the total market value of all  securities
                    and other assets held by the Trust, including income accrued
                    on its investments,  minus any liabilities including accrued
                    expenses,  divided by the total number of outstanding common
                    shares.  It is the underlying value of a single common share
                    on a given day. Net asset value for the Trust is  calculated
                    weekly and  published  in BARRON'S on Saturday  and THE WALL
                    STREET JOURNAL on Monday.

PREMIUM:            When a Trust's  market  price is greater  than its net asset
                    value, the Trust is said to be trading at a premium.


PREREFUNDED BONDS:  These  securities  are  collateralized  by  U.S.  Government
                    securities  which  are  held in  escrow  and are used to pay
                    principal and interest on the tax-exempt issue and to retire
                    the  bond in  full at the  date  indicated,  typically  at a
                    premium to par.

                                       19

--------------------------------      -----------------------------------------
[LOGO BLACKROCK]
--------------------------------      -----------------------------------------

DIRECTORS
Ralph L. Schlosstein, CHAIRMAN*                   ------------------------------
Andrew F. Brimmer                                 THE [LOGO BLACKROCK]
Richard E. Cavanagh                               INSURED MUNICIPAL
Kent Dixon                                        2008 TERM
Frank J. Fabozzi                                  TRUST INC.
Robert S. Kapito*                                 ------------------------------
James  Clayburn La Force,  Jr.                    SEMI-ANNUAL REPORT
Walter F.  Mondale                                JUNE 30, 2002

OFFICERS                                          [LOGO (SM) BLACKROCK]
Robert S.  Kapito, PRESIDENT*
Kevin M. Klingert, VICE PRESIDENT
Richard M. Shea, VICE PRESIDENT/TAX
Henry Gabbay, TREASURER
James Kong, ASSISTANT TREASURER
Anne Ackerley, SECRETARY

INVESTMENT ADVISOR
BlackRock Advisors, Inc.
100 Bellevue Parkway
Wilmington,  DE 19809
(800) 227-7BFM

ADMINISTRATOR
Princeton Administrators,  L.P.
P.O. Box 9095
Princeton,  NJ 08543-9095
(800) 543-6217

CUSTODIAN
State Street Bank and Trust Company
1 Heritage Drive
North Quincy,  MA 02171

TRANSFER AGENT
EquiServe Trust Company,  N.A.
150 Royall Street
Canton,  MA 02021
(800) 699-1BFM

AUCTION AGENT
Deutsche  Bank
4  Albany  Street
New  York,  NY 10006

INDEPENDENT  ACCOUNTANTS
Deloitte  & Touche  LLP
200  Berkeley  Street
Boston,  MA 02116

LEGAL  COUNSEL
Skadden, Arps, Slate, Meagher & Flom LLP
4 Times Square New York, NY 10036

LEGAL COUNSEL -- INDEPENDENT DIRECTORS
Debevoise & Plimpton
919 Third Avenue
New York, NY 10022

   The  accompanying  financial  statements as of June 30, 2002 were not audited
and accordingly, no opinion is expressed on them.

   This report is for shareholder information. This is not a prospectus intended
for use in the purchase or sale of Trust shares.

   Statements  and other  information  contained in this report are as dated and
are subject to change.

*    Laurence D. Fink has resigned his positions as Director and Chairman of the
     Board  effective  August 22, 2002. The Board of Directors  elected Ralph L.
     Schlosstein  as the new  Chairman  of the Board,  and  appointed  Robert S.
     Kapito as the new President of the Trust and as a new Director of the Board
     effective August 22, 2002.

                              The BlackRock Insured
                           Municipal 2008 Term Trust
                     Inc. c/o Princeton Administrators, L.P.
                                  P.O. Box 9095
                            Princeton, NJ 08543-9095
                                 (800) 543-6217

                                                                     09247K-10-9
                                                                     09247K-20-8
                                                                     09247K-30-7
                                                                     09247K-40-6

[RECYCLE LOGO]     Printed on recycled paper                         09247K-50-5
-------------------------------------------------------------------------------