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

                                                                   July 31, 2001

Dear Shareholder:

      The semi-annual period has been marked by the Federal Reserve's aggressive
response to the dramatic U.S. led global economic  slowdown.  Year-to-date,  the
Federal Open Market Committee (FOMC) has cut interest rates six times,  easing a
total of 275 basis  points.  Currently,  the  overnight  lending  rate is at its
lowest level since May 1994.  Investors  are  beginning to turn their  attention
away from past interest rate cuts and are  re-focusing on the potential  actions
of this  year's  accommodative  Fed.  In recent  FOMC  minutes,  investors  were
somewhat  surprised to see a degree of discord among committee members as to the
severity and timing of the final 50 basis point ease on May 15th. Coupled with a
more  cautious 25 basis point cut in late June,  it appears that the Fed will be
adopting a less aggressive posture.

      Recently,  released data has led some investors to conclude that the worst
may be behind us. U.S. factory orders, a figure specifically cited by the Fed as
a  driver  behind  recent  rate  cuts,   rebounded  by  2.5%  in  May.  Personal
consumption,  another important factor in the U.S. consumer-driven economy, rose
by 0.5%, and both  construction  spending and  manufacturing  activity have been
stronger than expected.  Finally,  despite aggressively  lowering interest rates
over the past six months,  inflation concerns appear benign.  Going forward,  we
look  to  employment  data  as  a  leading   indicator  of  economic   recovery.
Corporations  have  been  forced  to layoff  employees  as demand  for goods and
services  has  lagged in the  first two  quarters  of the year.  While  consumer
activity  has  been  reasonably  resilient  in  the  face  of  the  weakness  in
employment,  further  deterioration on the jobs front will most likely derail an
early recovery.

      The Treasury  yield  curve,  which began the year  inverted,  with shorter
maturity issues yielding more than longer  maturities,  steepened  significantly
over the semi-annual period. However, the yield curve flattened slightly in June
in response to benign inflationary  pressures and talks of a possible end to the
Fed's rate  reduction  program.  Disappointment  caused by the Fed's election to
dispense  only 25 basis points of easing,  coupled with  stronger  than expected
economic data,  caused yields on short and intermediate  maturity  Treasuries to
rise.  Short-term  yields  were  especially  hard-hit  with yields on 2-year and
5-year maturities rising 25 and 21 basis points, respectively.

      This semi-annual report contains a summary of market conditions during the
semi-annual  period and a review of portfolio  strategy by your Trust's managers
in addition to the Trust's unaudited financial statements and a detailed list of
the portfolio's holdings.  Continued thanks for your confidence in BlackRock. We
appreciate 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
Chairman                                        President

                                        1


                                                                   July 31, 2001

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, 2001. 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,  actively  managed  closed-end  bond fund whose
shares are traded on the New York Stock  Exchange  under the symbol  "BRM".  The
Trust's  investment  objective  is to  manage  a  portfolio  of  municipal  debt
securities  that  will  return  $15 per share (an  amount  equal to the  Trust's
initial public offering price) to investors on or about December 31, 2008, while
providing current income exempt from regular Federal income tax. The Trust seeks
to achieve this  objective 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 stock price and NAV
over the period:

                           -----------------------------------------------------
                             6/30/01    12/31/00    CHANGE     HIGH      LOW
--------------------------------------------------------------------------------
  STOCK PRICE                $15.60      $14.875     4.87%    $15.875   $15.00
--------------------------------------------------------------------------------
  NET ASSET VALUE (NAV)      $16.79      $16.62      1.02%    $16.94    $16.61
--------------------------------------------------------------------------------

THE FIXED INCOME MARKETS

     Economic  performance  continued  to  deteriorate  in the U.S.  and  abroad
through the second quarter as  corporations  continued to steadily unwind excess
inventories and capacity. While there has been some decline in consumption,  the
bulk of the weakness has manifested  itself in the business sector where capital
spending continues to plunge. Consequently, year-over-year industrial production
has turned  negative  for the first time since 1991.  Weakness in the  corporate
sector  has  begun to  spread to the labor  market.  The  unemployment  rate has
drifted up to 4.5% from a low of 3.9% in October of last year, and the four-week
average of initial  jobless claims rose to its highest level in nearly a decade.
Despite the  weakness  in the labor  market and overall  economy,  the  consumer
remains  relatively  upbeat.  While  many  economic  indicators  are at  1990-91
recessionary levels,  consumer confidence remains well above its readings of the
early  nineties.  The consumer  seems buoyed by a faith in the Federal  Reserve,
which  has  lowered  its funds  target  rate by 275 basis  points  during  2001.
Sluggish growth combined with a benign  inflationary  environment  should prompt
the Federal Reserve to maintain a low interest rate  environment  well into next
year.

     Over the  semi-annual  period,  the level and shape of the  Treasury  yield
curve were driven by  expectations of Fed activity and the issuance of corporate
debt.  Treasury  yields  steepened  significantly  in 2001 with yields on longer
maturity  issues rising relative to yields on shorter  maturities,  but began to
flatten slightly in June due to expectations that the Fed was nearing the end of
its  easing  cycle.  Yields  on short  and  intermediate  Treasuries  rose  with
short-term  yields  increasing  most  dramatically.  Yields on 2-year and 5-year
maturities rose 25 and 21 basis points  respectively for the second quarter.  In
addition,  corporate  issuance of long-term debt  represented a net sale of more
interest rate sensitive  bonds.  This further  pressured longer dated securities
and the  market in  general.  As of June 30,  2001,  the  10-year  Treasury  was
yielding 5.41% versus 5.11% on December 31, 2000.

     On a tax-adjusted basis,  municipal bonds outperformed the taxable domestic
bond market for the semi-annual period ending June 30, 2001, returning 4.76% (as
measured by the LEHMAN  MUNICIPAL  BOND INDEX at a tax bracket of 39.6%)  versus
3.62% for the LEHMAN AGGREGATE  INDEX.  Strong retail demand for municipal bonds
allowed the sector to show significant  outperformance  versus Treasuries across
the entire  curve.  In a dramatic  reversal from most of 2000,  the  semi-annual
period finally saw municipal  mutual fund  portfolios  experience  positive cash
flows.  The positive  cash flow into  municipal  mutual funds  continued for the
second  quarter with year to date inflows  totaling  $3.45  billion.  Municipals
benefited from retail's  continued efforts to diversify out of equities and into
fixed income investments.  Total supply year to date has increased by 39% versus
last year, with the

                                        2


majority of the  increase  coming  from the surge in  refinancing  activity.  We
expect to see continued  strong  performance from the municipal market as retail
continues  to  express  interest  in the lower  volatility  of the fixed  income
markets and attractive tax equivalent yields of municipal bonds.

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 may result in the
Trust  realizing a capital gain could require a taxable  distribution as well as
reduce the Trust's  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 via auction rate preferred stock
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 June 30, 2001, the Trust's  leverage amount was 37%
of total assets.

     The  following  chart  compares  the Trust's  current and December 31, 2000
asset composition:

--------------------------------------------------------------------------------
                                SECTOR BREAKDOWN
--------------------------------------------------------------------------------
  SECTOR                                 JUNE 30, 2001       DECEMBER 31, 2000
--------------------------------------------------------------------------------
  County, City & State                        25%                  25%
--------------------------------------------------------------------------------
  Utility/Power                               21%                  22%
--------------------------------------------------------------------------------
  Hospital                                    12%                  12%
--------------------------------------------------------------------------------
  Education                                   11%                  11%
--------------------------------------------------------------------------------
  Transportation                               7%                   7%
--------------------------------------------------------------------------------
  Tax Revenue                                  6%                   5%
--------------------------------------------------------------------------------
  Lease Revenue                                5%                   5%
--------------------------------------------------------------------------------
  Water & Sewer                                5%                   5%
--------------------------------------------------------------------------------
  Special District                             5%                   5%
--------------------------------------------------------------------------------
  Housing                                      2%                   2%
--------------------------------------------------------------------------------
  Industrial & Pollution Control               1%                   1%
--------------------------------------------------------------------------------


                                       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


--------------------------------------------------------------------------------
              THE BLACKROCK INSURED MUNICIPAL 2008 TERM TRUST INC.
--------------------------------------------------------------------------------
  Symbol on New York Stock Exchange:                                BRM
--------------------------------------------------------------------------------
  Initial Offering Date:                                      September 18, 1992
--------------------------------------------------------------------------------
  Closing Stock Price as of 6/30/01:                               $15.60
--------------------------------------------------------------------------------
  Net Asset Value as of 6/30/01:                                   $16.79
--------------------------------------------------------------------------------
  Yield on Closing Stock Price as of 6/30/01 ($15.60)(1):            5.10%
--------------------------------------------------------------------------------
  Current Monthly Distribution per Common Share(2):                $ 0.06625
--------------------------------------------------------------------------------
  Current Annualized Distribution per Common Share(2):             $ 0.79500
--------------------------------------------------------------------------------

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

(2) 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, 2001 (UNAUDITED)
--------------------------------------------------------------------------------


          PRINCIPAL
           AMOUNT                                                                           OPTION CALL      VALUE
 RATING*    (000)                                  DESCRIPTION                              PROVISIONS+     (NOTE 1)
-----------------------------------------------------------------------------------------------------------------------
                                                                                              
                     LONG-TERM INVESTMENTS--157.1%
                     ALABAMA--0.3%
   AAA    $ 1,905    Mobile Impvt. Wt., Zero Coupon, 8/15/08, MBIA ......................  8/02 @ 71.587  $ 1,300,334
                                                                                                          -----------
                     ARIZONA--0.6%
   AAA      4,000    Chandler, G.O., Zero Coupon, 7/01/08, FGIC .........................    No Opt. Call   2,960,080
                                                                                                          -----------
                     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    1,995,349
                                                                                                          -----------
                     COLORADO--12.0%
   AAA      2,000    E-470 Pub. Hwy. Auth. Rev., Ser. B, Zero Coupon, 9/01/11, MBIA .....    No Opt. Call   1,226,840
   AAA     30,205++  Jefferson Cnty. Sch. Dist. No. R-001, G.O., 6.25%, 12/15/02, AMBAC .         N/A      31,950,849
   AAA      6,965    Regl. Transp. Dist., C.O.P., Trans. Vehicles Proj.
                      Ser. A, 5.00%, 6/01/08, MBIA ......................................     6/07 @ 101    7,325,439
   AAA     13,285++  Univ. of Colorado Hosp. Auth. Rev., Ser. A, 6.25%, 11/15/02, AMBAC .         N/A      14,144,539
                                                                                                          -----------
                                                                                                           54,647,667
                                                                                                          -----------
                     DISTRICT OF COLUMBIA--8.3%
                     Dist. of Columbia, G.O.,
   AAA        195     Ser. B, 5.50%, 6/01/09, FSA .......................................         ETM         211,622
   AAA      2,605     Ser. B, 5.50%, 6/01/09, FSA .......................................    No Opt. Call   2,793,029
   AAA     17,950++   Ser. B, 6.30%, 6/01/02, MBIA ......................................         N/A      18,882,323
   AAA     10,000     Ser. B-1, 5.50%, 6/01/08, AMBAC ...................................    No Opt. Call  10,728,400
   AAA        115++   Ser. E, 5.875%, 6/01/03, MBIA .....................................         N/A         122,915
   AAA      2,955     Ser. E, 5.875%, 6/01/08, MBIA .....................................     6/03 @ 102    3,109,813
   AAA      2,000    Dist. of Columbia, Hosp. Rev., Children's Hosp., Ser. A, 6.25%,
                      7/15/08, FGIC .....................................................     7/02 @ 102    2,083,040
                                                                                                          -----------
                                                                                                           37,931,142
                                                                                                          -----------
                     FLORIDA--0.5%
   AAA      2,080    Tampa Fla. Wtr. & Swr. Rev., 5.50%, 10/01/08, FSA (WI) .............    No Opt. Call   2,169,003
                     GEORGIA--2.8%
   AAA      7,000++  Atlanta, C.O.P., Pretrial Det. Ctr., 6.25%, 12/01/02, MBIA .........         N/A       7,462,980
   AAA      5,000    Georgia St., G.O., Ser. E, 5.25%, 2/01/10 ..........................    No Opt. Call   5,331,150
                                                                                                          -----------
                                                                                                           12,794,130
                                                                                                          -----------
                     ILLINOIS--15.2%
   AAA     14,205    Chicago O' Hare Intl. Arprt. Rev., Ser. A, 6.25%, 1/01/08, MBIA ....     1/05 @ 102   15,362,423
   AAA      3,105    Chicago Pub. Bldg. Comm. Bldg. Rev., Ser. A, Zero Coupon,
                      1/01/07, MBIA .....................................................         ETM       2,464,966
                     Chicago Sch. Fin. Auth., G.O., Ser. A, FGIC,
   AAA     13,000     6.25%, 6/01/07 ....................................................     6/02 @ 102   13,532,740
   AAA      9,150     6.25%, 6/01/09 ....................................................     6/02 @ 102    9,519,935
   Aaa      5,980    Cook Cnty. High Sch. Dist. No. 201 J. Sterling Morton Twnshp.,
                      Zero Coupon, 12/01/09, FGIC .......................................    No Opt. Call   4,039,311
   AAA      8,985    Du Page Cnty. Fst. Presv. Dist., Zero Coupon, 11/01/08 .............    No Opt. Call   6,465,875
   AAA     10,300++  Illinois Hlth. Fac. Auth. Rev., Alexian Med. Ctr. Proj.,
                      Ser. A, 6.35%, 1/01/02, MBIA ......................................         N/A      10,687,177
                     Met. Pier & Expo. Auth. Ded. St. Tax Rev. Auth., FGIC,
   AAA      1,570     Ser. A, Zero Coupon, 6/15/08 ......................................         ETM       1,160,481
   AAA      8,600     Ser. A, Zero Coupon, 6/15/08 ......................................    No Opt. Call   6,294,426
                                                                                                          -----------
                                                                                                           69,527,334
                                                                                                          -----------
                     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       1,902,253
   AAA      3,860     Ser. A, 6.25%, 7/01/08 ............................................     7/02 @ 102    4,162,161
   AAA      1,385++   Ser. B, 6.25%, 7/01/02 ............................................         N/A       1,459,624
   AAA      2,965     SER. B, 6.25%, 7/01/08 ............................................     7/02 @ 102    3,197,100
                                                                                                          -----------
                                                                                                           10,721,138
                                                                                                          -----------


                       See Notes to Financial Statements.

                                        5




-----------------------------------------------------------------------------------------------------------------------
          PRINCIPAL
           AMOUNT                                                                           OPTION CALL      VALUE
 RATING*    (000)                                  DESCRIPTION                              PROVISIONS+     (NOTE 1)
-----------------------------------------------------------------------------------------------------------------------
                                                                                              
                     IOWA--0.9%
   AAA     $   85    Iowa Fin. Auth., Sngl. Fam. Mtg. Rev., Ser. F, 6.35%,
                      7/01/09, AMBAC ....................................................     1/03 @ 102    $  88,081
   AAA      4,195    Muscatine, Elec. Rev., 5.00%, 1/01/08, FSA .........................     8/01 @ 100    4,217,108
                                                                                                          -----------
                                                                                                            4,305,189
                                                                                                          -----------
                     KENTUCKY--0.6%
   AAA      3,890    Owensboro, Elec. Lt. & Pwr. Rev., Ser. B, Zero Coupon,
                      1/01/09, AMBAC ....................................................   No Opt. Call    2,776,526
                                                                                                          -----------
                     LOUISIANA--1.2%
   AAA      5,000++  Louisiana Pub. Fac. Auth. Hosp. Rev., Lafayette Gen.
                      Med. Ctr. Proj., 6.30%, 10/01/02, FSA .............................         N/A       5,298,450
                                                                                                         ------------
                     MASSACHUSETTS--4.7%
   AAA      4,465++  Chelsea, Sch. Proj. Loan, 6.00%, 6/15/04, AMBAC ....................         N/A       4,869,752
                     Massachusetts Bay Trans. Auth. Rev., Ser. B, MBIA,
   AAA        200++   6.00%, 3/01/03 ....................................................         N/A         213,014
   AAA      5,800     6.00%, 3/01/10 ....................................................     3/03 @ 102    6,099,976
   AAA     10,000    Massachusetts St. Hsg. Fin. Agcy. Hsg. Proj., Ser. A, 5.95%,
                      10/01/08, AMBAC ...................................................     4/03 @ 102   10,415,700
                                                                                                          -----------
                                                                                                           21,598,442
                                                                                                          -----------
                     MICHIGAN--4.5%
                     Lake Orion, Cmnty. Sch. Dist., AMBAC,
   AAA      3,290++   6.60%, 5/01/05 ....................................................         N/A       3,670,521
   AAA      3,285++   6.70%, 5/01/05 ....................................................         N/A       3,676,572
   AAA      8,920++  Michigan St. Bldg. Auth. Rev., Fac. Proj., Ser. IIA, 6.25%,
                      10/01/02, AMBAC ...................................................         N/A       9,461,801
   AAA      3,400    Wyandotte, Elec. Rev., 6.25%, 10/01/08, MBIA .......................   No Opt. Call    3,754,314
                                                                                                          -----------
                                                                                                           20,563,208
                                                                                                          -----------
                     MISSOURI--1.6%
   AAA      7,315    Kansas City, Sch. Dist. Bldg. Corp. Leasehold Rev.,
                      Cap. Impvts. Proj., Ser. A, 6.50%, 2/01/08, FGIC ..................     8/01 @ 102    7,472,273
                                                                                                          -----------
                     NEVADA--4.6%
   AAA      6,490++  Clark Cnty. Fld. Ctrl., 6.30%, 11/01/01, AMBAC .....................         N/A       6,629,016
                     Director St. Dept. Las Vegas Monorail, AMBAC,
   AAA      2,085     Zero Coupon, 1/01/09 ..............................................   No Opt. Call    1,471,906
   AAA      3,585     Zero Coupon, 1/01/10 ..............................................   No Opt. Call    2,396,214
                     Washoe Cnty. Arpt. Auth. Rev., Ser. B, MBIA,
   AAA      3,135     5.70%, 7/01/07 ....................................................     7/03 @ 102    3,301,280
   AAA      2,645     5.75%, 7/01/08 ....................................................     7/03 @ 102    2,787,804
   AAA      4,135++  Washoe Cnty. Sch. Dist., G.O., Ser. A, 6.20%, 10/01/02, AMBAC ......         N/A       4,341,129
                                                                                                          -----------
                                                                                                           20,927,349
                                                                                                          -----------
                     NEW JERSEY--12.8%
   AAA     30,275    New Jersey Econ. Dev. Auth., Mkt. Trans. Fac. Rev., Ser. A,
                      5.80%, 7/01/08, MBIA ..............................................     7/04 @ 102   32,377,902
                     New Jersey St., G.O., Ser. D, MBIA,
   AAA      8,370++   6.00%, 2/15/03 ....................................................         N/A       8,904,843
   AAA     16,125     6.00%, 2/15/09 ....................................................     2/03 @ 102   16,966,725
                                                                                                          -----------
                                                                                                           58,249,470
                                                                                                          -----------
                     NEW YORK--12.7%
                     New York City, G.O., MBIA,
   AAA      5,000     Ser. E, 6.125%, 8/01/06 ...........................................   No Opt. Call    5,539,900
   AAA     15,500     Ser. E, 6.20%, 8/01/07 ............................................   No Opt. Call   17,355,505
   AAA      5,000     Ser. G, 5.75%, 2/01/08 ............................................   2/06 @ 101.5    5,414,100
                     New York St. Env. Fac. Corp., P.C.R., Ser. D,
   AAA      5,945     6.50%, 5/15/07 ....................................................    11/04 @ 102    6,553,412
   AAA      2,245     6.50%, 11/15/07 ...................................................    11/04 @ 102    2,474,753
   AAA     15,915    New York St., G.O., Ser. F, 5.25%, 9/15/09, MBIA ...................     9/08 @ 101   17,050,694
   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    3,583,524
                                                                                                          -----------
                                                                                                           57,971,888
                                                                                                          -----------


                       See Notes to Financial Statements.

                                        6




-----------------------------------------------------------------------------------------------------------------------
          PRINCIPAL
           AMOUNT                                                                           OPTION CALL      VALUE
 RATING*    (000)                                  DESCRIPTION                              PROVISIONS+     (NOTE 1)
-----------------------------------------------------------------------------------------------------------------------
                                                                                              
                     NORTH CAROLINA--8.5%
   AAA    $ 1,000++  Cumberland Cnty., C.O.P., Civic Ctr. Proj., Ser. A, 6.375%,
                      12/01/04, AMBAC ...................................................        N/A      $ 1,113,040
                     North Carolina Eastn. Mun. Pwr. Agcy. Sys. Rev., Ser. B,
   AAA     13,500     6.125%, 1/01/09, FGIC .............................................   No Opt. Call   14,964,210
   AAA      5,000     7.00%, 1/01/08, CAPMAC ............................................   No Opt. Call    5,736,150
   AAA     14,675     7.25%, 1/01/07, CAPMAC ............................................   No Opt. Call   16,815,789
                                                                                                         ------------
                                                                                                           38,629,189
                                                                                                         ------------
                     OHIO--2.2%
   AAA      2,410++  Cleveland, G.O., 6.40%, 11/15/04, MBIA .............................         N/A       2,681,535
   AAA      6,095    Hamilton City, Elec. Sys. Rev., Ser. A, 6.125%, 10/15/08, FGIC .....    10/02 @ 102    6,400,786
   AAA      1,000++  Ohio St. Bldg. Auth. Fac. Rev., Juvenile Correctional Proj.,
                      6.50%, 10/01/04, AMBAC ............................................         N/A       1,112,510
                                                                                                         ------------
                                                                                                           10,194,831
                                                                                                         ------------
                     PENNSYLVANIA--13.1%
   AAA      4,000    Allegheny Cnty. Hosp. Dev. Auth. Rev., Magee Women's Hosp.,
                      6.25%, 10/01/08, FGIC .............................................    10/02 @ 102    4,204,080
                     Dauphin Cnty. Gen. Auth. Hosp. Rev., HAPSCO-Western
                      Pennsylvania Hosp. Proj., MBIA,
   AAA      5,000     6.25%, 7/01/08 ....................................................         ETM       5,452,200
   AAA     10,000     6.25%, 7/01/08 ....................................................     7/02 @ 102   10,449,200
   AAA      6,600    Erie Cnty. Hosp. Auth. Rev., St. Vincent Hlth. Ctr. Proj.,
                      Ser. A, 6.25%, 7/01/08, MBIA ......................................     7/02 @ 102    6,896,472
   AAA      3,500    Indiana Cnty. Indl. Dev. Auth., P.C.R., New York St.
                      Elec. & Gas Corp., Ser. A,
                      6.00%, 6/01/06, MBIA ..............................................   No Opt. Call    3,825,675
   AAA      6,500    Pennsylvania Hsg. Fin. Agcy. Rev., Rental Hsg., Ser. C, 6.25%,
                      7/01/07, FNMA .....................................................     7/02 @ 102    6,712,940
   AAA      7,450++  Pennsylvania St., G.O., Ser. A, 6.50%, 11/01/01, FGIC ..............         N/A       7,651,746
   AAA      3,175    Philadelphia, G.O., 4.10%, 9/15/08, FSA ............................   No Opt. Call    3,163,030
   AAA     10,930++  Pittsburgh, G.O., Ser. D, 6.00%, 9/01/02, AMBAC ....................         N/A      11,523,281
                                                                                                         ------------
                                                                                                           59,878,624
                                                                                                         ------------
                     TEXAS--26.9%
   AAA     13,000++  Austin Pub. Impvt., G.O., 6.10%, 9/01/02, AMBAC ....................         N/A      13,476,320
                     Austin Util. Sys. Rev.,
   AAA     11,515     Ser. A, Zero Coupon, 11/15/08, MBIA ...............................   No Opt. Call    8,314,060
   AAA      5,000     Ser. A, Zero Coupon, 11/15/09, AMBAC ..............................   No Opt. Call    3,403,799
   AAA      5,000     Ser. A, Zero Coupon, 11/15/09, MBIA ...............................   No Opt. Call    3,403,800
   AAA      7,000     6.25%, 11/15/08, AMBAC ............................................    11/02 @ 102    7,376,250
   AAA      5,000     6.625%, 11/15/08, AMBAC ...........................................   No Opt. Call    5,754,350
                     Baytown, G.O., AMBAC,
   AAA      2,385++   6.40%, 2/01/02 ....................................................         N/A       2,435,395
   AAA      2,840     6.40%, 2/01/08 ....................................................     2/02 @ 100    2,882,430
   AAA      9,930    Circle C Mun. Util. Dist. No. 3 Rev., 6.50%, 11/15/09, FGIC ........    11/01 @ 100   10,026,420
                     Coppell Indpt. Sch. Dist., MBIA,
   AAA      1,430     6.10%, 8/15/09 ....................................................         ETM       1,613,269
   AAA      2,495     6.10%, 8/15/09 ....................................................     8/02 @ 100    2,555,903
   AAA      4,390    Houston Indpt. Sch. Dist., Zero Coupon, 8/15/09, AMBAC .............   No Opt. Call    3,022,998
   AAA     16,135    Houston Wtr. & Swr. Sys. Rev., Jr. Lien, Ser. C, 6.25%,
                      12/01/09, MBIA ....................................................    12/02 @ 102   16,992,414
   AAA      6,000    San Antonio Elec. & Gas Rev., Ser. B, Zero Coupon, 2/01/10, FGIC ...         ETM       4,018,380
                     Texas Mun. Pwr. Agcy. Rev.,
   AAA     15,000     Zero Coupon, 9/01/08, AMBAC .......................................   No Opt. Call   10,928,848
   AAA     16,175     Zero Coupon, 9/01/09, AMBAC .......................................   No Opt. Call   11,115,622
   AAA      7,000     5.00%, 9/01/10, FGIC ..............................................     9/04 @ 100    7,117,950
   AAA      5,900    Texas St. Pub. Fin. Auth. Bldg. Rev., Ser. B, 6.25%,
                      2/01/09, AMBAC ....................................................   No Opt. Call    6,621,157
   AAA      2,275    Ysleta Indpt. Sch. Dist. Rev., Zero Coupon, 8/15/08, PSFG ..........   No Opt. Call    1,660,795
                                                                                                         ------------
                                                                                                          122,720,160
                                                                                                         ------------


                       See Notes to Financial Statements.

                                        7




-----------------------------------------------------------------------------------------------------------------------
          PRINCIPAL
           AMOUNT                                                                           OPTION CALL      VALUE
 RATING*    (000)                                  DESCRIPTION                              PROVISIONS+     (NOTE 1)
-----------------------------------------------------------------------------------------------------------------------
                                                                                            
                     UTAH--3.5%
                     Intermountain Pwr. Agcy. Pwr. Supply Rev., Ser. B, MBIA,
   AAA    $ 2,215     6.00%, 7/01/07 ....................................................         ETM   $   2,455,062
   AAA      1,285     6.00%, 7/01/07 ....................................................   No Opt. Call    1,411,881
   AAA      1,550++  Salt Lake Cnty. Mun. Bldg. Auth. Lease Rev., Ser. A, 6.05%,
                      10/01/04, MBIA ....................................................         N/A       1,656,717
   AAA     10,300    Utah St., G.O., Ser. F, 5.00%, 7/01/10 .............................     7/07 @ 100   10,620,330
                                                                                                        -------------
                                                                                                           16,143,990
                                                                                                        -------------
                     WASHINGTON--14.2%
   AAA     12,850    King Cnty., G.O., Ser. D, 5.55%, 12/01/08, MBIA ....................    12/07 @ 102   13,936,210
                     Snohomish Cnty. Sch. Dist., G.O., MBIA,
   AAA      2,235++   6.10%, 12/01/03 ...................................................         N/A       2,427,970
   AAA      1,765     6.10%, 12/01/08 ...................................................    12/03 @ 102    1,884,579
                     Washington St. Hlth. Care Fac. Auth. Rev., MBIA,
   AAA      1,010     Catholic Hlth. Initiatives A, 5.30%, 12/01/08 .....................   No Opt. Call    1,067,580
   AAA      1,000     Catholic Hlth. Initiatives A, 5.40%, 12/01/10 .....................     6/10 @ 101    1,061,590
   AAA      9,000     Virginia Mason Oblig. Group, 6.30%, 2/15/09 .......................     2/03 @ 102    9,475,200
                     Washington St. Pub. Pwr. Supply Sys. Rev.,
   AAA      3,000     Nuclear Proj. No. 2, 5.55%, 7/01/10, FGIC .........................     7/03 @ 102    3,085,350
   AAA     13,635     Nuclear Proj. No. 2, Ser. A, 6.25%, 7/01/09, MBIA .................     7/02 @ 102   14,229,759
   AAA      5,550     Nuclear Proj. No. 3, Zero Coupon, 7/01/07, BIGI ...................   No Opt. Call    4,264,564
   AAA      2,000     Nuclear Proj. No. 3, Zero Coupon, 7/01/08, BIGI ...................   No Opt. Call    1,456,920
   AAA     11,000     Ser. A, 5.80%, 7/01/07, FSA .......................................   No Opt. Call   11,939,950
                                                                                                        -------------
                                                                                                           64,829,672
                                                                                                        -------------
                     WEST VIRGINIA--2.7%
   AAA     11,600    West Virginia St. Pkwys. Econ. Dev. & Tourism Auth., 5.70%,
                      5/15/09, FGIC .....................................................     5/03 @ 102   12,128,844
                                                                                                        -------------
                     TOTAL LONG-TERM INVESTMENTS (COST $667,336,520) ....................                 717,734,282
                                                                                                        -------------
                     SHORT-TERM INVESTMENTS**--0.9%
KANSAS--0.3%
  A-1+      1,100    Kansas St. Dept. Trans. Hwy. Rev., Ser. B-2, 3.30%,
                      7/02/01, FRDD .....................................................         N/A       1,100,000
                                                                                                        -------------
                     NEW YORK--0.4%
  A-1+      1,890    New York City, G.O., Ser. B-2, 3.15%, 7/02/01, FRDD ................         N/A       1,890,000
                                                                                                        -------------
                     TEXAS--0.2%
  A-1+      1,000    Harris Cnty. Hlth. Fac. Dev. Corp. Rev., St. Lukes
                      Episcopal Hosp., Ser. A, 3.30%, 7/02/01, FRDD .....................         N/A       1,000,000
                                                                                                        -------------
                     TOTAL SHORT-TERM INVESTMENTS (COST $3,990,000) .....................                   3,990,000
                                                                                                        -------------
                     TOTAL INVESTMENTS--158.0% (COST $671,326,520) ......................                 721,724,282
                     Other assets in excess of liabilities--1.3% ........................                   6,113,003
                     Liquidation value of preferred stock--(59.3)% ......................                (271,000,000)
                                                                                                        -------------
                     NET ASSETS APPLICABLE TO COMMON SHAREHOLDERS--100% .................               $ 456,837,285
                                                                                                        =============


----------
 *  Using the higher of Standard & Poor's, Moody's or Fitch's rating.
**  For  purposes of  amortized  cost  valuation,  the  maturity  dates 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.
 +  Option call provisions: date (month/year) and price of the earliest optional
    call or redemption.  There may be other call provisions at varying prices at
    later dates.
++  This bond is prerefunded. See glossary for definition.

                       See Notes to Financial Statements.

                                        8


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

                              KEY TO ABBREVIATIONS:

     AMBAC -- American Municipal Bond Assurance Corporation
      BIGI -- Bond Investors Guaranty Insurance Company
    CAPMAC -- Capital Markets Assurance Company
    C.O.P. -- Certificate of Participation
       ETM -- Escrowed to Maturity
      FGIC -- Financial Guaranty Insurance Company
      FNMA -- Federal National Mortgage Association
      FRDD -- Floating Rate Daily Demand
       FSA -- Financial Security Assurance
      G.O. -- General Obligation
      MBIA -- Municipal Bond Insurance Association
    P.C.R. -- Pollution Control Revenue
      PSFG -- Permanent School Fund Guaranty
        WI -- When Issued

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



                       See Notes to Financial Statements.

                                        9


--------------------------------------------------------------------------------
THE BLACKROCK INSURED
MUNICIPAL 2008 TERM TRUST INC.
STATEMENT OF ASSETS AND LIABILITIES
JUNE 30, 2001 (UNAUDITED)
--------------------------------------------------------------------------------
ASSETS
Investments, at value (cost $671,326,520)
  (Note 1) ................................................       $ 721,724,282
Cash ......................................................              73,780
Interest receivable .......................................          10,755,436
Receivable for investments sold ...........................              55,000
Other assets ..............................................               6,266
                                                                  -------------
                                                                    732,614,764
                                                                  -------------
LIABILITIES
Payable for securities purchased ..........................           2,178,135
Dividends payable--common stock ...........................           1,802,470
Dividends payable--preferred stock ........................             191,750
Investment advisory fee payable (Note 2) ..................             210,141
Administration fee payable (Note 2) .......................              60,040
Deferred directors fees (Note 1) ..........................              26,270
Other accrued expenses ....................................             308,673
                                                                  -------------
                                                                      4,777,479
                                                                  -------------
NET INVESTMENT ASSETS .....................................       $ 727,837,285
                                                                  =============
Net investment assets were comprised of:
Common stock:
    Par value (Note 4) ....................................       $     272,071
    Paid-in capital in excess of par ......................         377,481,620
  Preferred stock (Note 4) ................................         271,000,000
                                                                  -------------
                                                                    648,753,691
  Undistributed net investment income (Note 1) ............          29,010,770
  Accumulated net realized loss (Note 1) ..................            (324,938)
  Net unrealized appreciation (Note 1) ....................          50,397,762
                                                                  -------------
Net investment assets, June 30, 2001 ......................       $ 727,837,285
                                                                  =============
Net assets applicable to common shareholders ..............       $ 456,837,285
                                                                  =============
Net asset value per share:
  ($456,837,285 / 27,207,093 shares of
  common stock issued and outstanding) ....................              $16.79
                                                                         ======

--------------------------------------------------------------------------------
THE BLACKROCK INSURED
MUNICIPAL 2008 TERM TRUST INC.
STATEMENT OF OPERATIONS
SIX MONTHS ENDED JUNE 30, 2001 (UNAUDITED)
--------------------------------------------------------------------------------

NET INVESTMENT INCOME
Income
  Interest (Note 1) .......................................          $20,447,716
                                                                     -----------
Expenses
  Investment advisory .....................................            1,267,304
  Administration ..........................................              362,087
  Auction agent ...........................................              354,500
  Custodian ...............................................               67,500
  Reports to shareholders .................................               41,500
  Directors ...............................................               38,500
  Independent accountants .................................               19,500
  Registration ............................................               16,500
  Transfer agent ..........................................               14,000
  Legal ...................................................               11,500
  Miscellaneous ...........................................               97,402
                                                                     -----------
  Total expenses ..........................................            2,290,293
                                                                     -----------
Net investment income .....................................           18,157,423
                                                                     -----------
REALIZED AND UNREALIZED GAIN
ON INVESTMENTS
Net realized gain on investments ..........................               33,948
Net change in unrealized appreciation
  on investments ..........................................            1,977,257
                                                                     -----------
Net gain on investments ...................................            2,011,205
                                                                     -----------
NET INCREASE IN NET INVESTMENT
ASSETS RESULTING FROM OPERATIONS ..........................          $20,168,628
                                                                     ===========

                       See Notes to Financial Statements.

                                       10


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



                                                                                       SIX MONTHS ENDED    YEAR ENDED
                                                                                           JUNE 30,       DECEMBER 31,
                                                                                             2001             2000
                                                                                        ------------      ------------
                                                                                                    
INCREASE (DECREASE) IN NET INVESTMENT ASSETS

OPERATIONS:
  Net investment income ............................................................    $ 18,157,423      $ 35,381,235
  Net realized gain (loss) on investments ..........................................          33,948           (19,108)
  Net change in unrealized appreciation on investments .............................       1,977,257        14,541,901
                                                                                        ------------      ------------
    Net increase in net investment assets resulting from operations ................      20,168,628        49,904,028
                                                                                        ------------      ------------
DIVIDENDS:
  To common shareholders from net investment income ................................     (10,814,559)      (21,629,152)
  To preferred shareholders from net investment income .............................      (4,574,220)      (10,564,692)
                                                                                        ------------      ------------
    Total dividends ................................................................     (15,388,779)      (32,193,844)
                                                                                        ------------      ------------
CAPITAL STOCK TRANSACTIONS:
  Net proceeds from additional issuance of preferred shares ........................              --        64,032,840
                                                                                        ------------      ------------
    Total increase .................................................................       4,779,849        81,743,024
                                                                                        ------------      ------------
NET INVESTMENT ASSETS
Beginning of period ................................................................     723,057,436       641,314,412
                                                                                        ------------      ------------
End of period (including undistributed net investment income of
  $29,010,770 and $25,792,372, respectively) .......................................    $727,837,285      $723,057,436
                                                                                        ============      ============


                       See Notes to Financial Statements.

                                       11


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



                                                                                      YEAR ENDED DECEMBER 31,
                                                      SIX MONTHS ENDED ----------------------------------------------------
                                                        JUNE 30, 2001    2000       1999       1998       1997      1996
                                                      ---------------- --------   --------   --------   --------   --------
                                                                                                
PER COMMON SHARE OPERATING PERFORMANCE:
Net asset value, beginning of the period .............     $ 16.62     $ 16.00    $ 17.06    $ 16.80   $ 15.90    $ 16.08
                                                           --------    --------   --------   --------   --------   --------
  Net investment income (a) ..........................         .67        1.30       1.21       1.20      1.18       1.17
  Net realized and unrealized gain (loss)
    on investments (a) ...............................         .07        .54       (1.23)      .11        .78       (.27)
                                                           --------    --------   --------   --------   --------   --------
Net increase (decrease) from investment operations ...         .74        1.84       (.02)      1.31      1.96        .90
                                                           --------    --------   --------   --------   --------   --------
Dividends and distributions:
Dividends from net investment income to:
    Common shareholders ..............................        (.40)       (.80)      (.80)      (.80)     (.79)      (.79)
    Preferred shareholders ...........................        (.17)       (.38)      (.24)      (.25)     (.27)      (.25)
Distributions from net realized gain on
  investments to:
    Common shareholders ..............................       --          --         --         --        --          (.03)
    Preferred shareholders ...........................       --          --         --         --        --          (.01)
Distributions in excess of net realized gain on
  investments to:
    Common shareholders ..............................       --          --         --           **        **         **
    Preferred shareholders ...........................       --          --         --           **        **         **
                                                           --------    --------   --------   --------   --------  --------
Total dividends and distributions ....................        (.57)      (1.18)     (1.04)     (1.05)    (1.06)     (1.08)
                                                           --------    --------   --------   --------   --------  --------
Capital charge with respect to issuance of
  preferred shares ...................................       --           (.04)        --         --        --        --
                                                           --------    --------   --------   --------   --------  --------
Net asset value, end of period* ......................     $ 16.79     $ 16.62    $ 16.00    $ 17.06   $ 16.80    $ 15.90
                                                           ========    ========   ========   ========  ========   ========
Market value, end of period* .........................     $ 15.60     $ 14.88    $ 13.75    $ 16.13   $ 15.25    $ 14.50
                                                           ========    ========   ========   ========  ========   ========
TOTAL INVESTMENT RETURN+ .............................         7.58%     14.40%    (10.14)%    11.21%    10.97%     13.56%
                                                           ========    ========   ========   ========  ========   ========
RATIOS TO AVERAGE NET ASSETS OF COMMON
  SHAREHOLDERS:++
Expenses .............................................         1.01%+++    1.05%       .93%       .88%      .92%        .95%
Net investment income before preferred
  stock dividends (a) ................................         8.01%+++    8.06%      7.30%      7.10%      7.19%      7.32%
Preferred stock dividends ............................         2.02%+++    2.40%      1.47%      1.49%      1.03%      1.64%
Net investment income available to common
  shareholders (a) ...................................         5.99%+++    5.66%      5.83%      5.61%      5.56%      5.68%

SUPPLEMENTAL DATA:
Average net assets of common shareholders (000) ......     $457,174    $438,958   $452,317   $458,993   $444,895   $434,692
Portfolio turnover                                                1%          3%         1%         0%        11%         8%
Net assets of common shareholders,
  end of period (000) ................................     $456,837    $452,057   $435,314   $464,236   $457,192   $432,609
Preferred stock outstanding (000)                          $271,000    $271,000   $206,000   $206,000   $206,000   $206,000
Asset coverage per share of preferred stock,
  end of period ......................................     $ 67,161    $ 66,735   $ 77,857   $ 81,361   $ 80,508   $ 77,525


----------
  * Net asset value and market  value are  published in BARRON'S on Saturday and
    THE WALL STREET JOURNAL on Monday.
 ** Actual  amount paid to common  shareholders  was  $0.005235,  $0.004814  and
    $0.00271  for  the  years  ended   December  31,  1998,   1997,   and  1996,
    respectively.  Actual amount paid to preferred  shareholders  was $0.001696,
    $0.00154  and  $0.00084  per common  share for the years ended  December 31,
    1998, 1997 and 1996, respectively.
  + Total investment return is calculated assuming a purchase of common stock 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,
    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
    periods less than one full year are not annualized.  Past performance is not
    a guarantee of future results.
 ++ Ratios are calculated on the basis of income and expenses applicable to both
    the common and preferred stock, relative to the average net assets of common
    shareholders.
+++ Annualized.

(a) As required,  effective January 1, 2001, the Fund had adopted the provisions
    of the AICPA Audit and Accounting  Guide for Investment  Companies and began
    amortizing  market  discount on debt  securities.  The change in  accounting
    policy had no impact on the total net assets of the  Trust.  The  reclass of
    this  change for the six months  ended June 30,  2001 to the net  investment
    income from net  realized and  unrealized  gains and losses per common share
    were less than  $0.005  per  share.  The ratio of net  investment  income to
    average net assets on common shares  increased  from 5.97% to 5.99% and from
    7.99% to 8.01% on net investment  income before  preferred stock  dividends.
    Per share,  ratios and  supplemental  data for prior  periods  have not been
    restated to reflect this change in presentation.

The information above represents the unaudited operating  performance data for a
share of common stock outstanding,  total investment  return,  ratios to average
net  assets  and  other  supplemental  data  for  the  periods  indicated.  This
information has been determined based upon financial information provided in the
financial statements and market value data for 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          The BlackRock  Insured  Municipal  2008 Term Trust
& ACCOUNTING                  Inc. (the  "Trust"),  was organized in Maryland on
POLICIES                      August  7,  1992  as  a  diversified,   closed-end
                              management   investment   company.   The   Trust's
investment  objective  is to  manage a  diversified  portfolio  of high  quality
securities  that will return $15 per share to investors on or about December 31,
2008 while providing  current income exempt from regular Federal income tax. 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  objective 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  approved  by the  Trust's  Board of
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 in  determining  values.  Short-term
investments  are 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 the 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,  respectively,
to interest income on securities purchased using the interest method.

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 those
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 for the Directors as though  equivalent dollar
amounts had been invested in common shares of other  BlackRock funds 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 funds.

   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 funds selected by
the Directors in order to match its deferred compensation obligations.

NEW ACCOUNTING  POLICIES:  Effective  January 1, 2001, the Trust has adopted the
provisions of the AICPA Audit and Accounting Guide for Investment Companies,  as
revised,  and began  amortizing  market  discount on debt  securities.  Prior to
January 1, 2001,  the Trust  amortized  premiums and original  issue discount on
debt securities.  The cumulative  effect of this accounting policy change had no
impact  on the total  net  assets of the  Trust.  This  resulted  in a  $449,754
increase  to   undistributed   net   investment   income  of  securities  and  a
corresponding decrease in net unrealized appreciation,  based on securities held
by the Trust on January 1, 2001.

   The  effect of this  change for the six  months  ended  June 30,  2001 was to
increase net investment income by $45,248:decrease  net unrealized  appreciation
by $18,480 and decrease net realized gains by $26,768.  The Statement of Changes
in Net  Investment  Assets and the  Financial  Highlights of the Trust for prior
periods have not been restated to reflect this change.

                                       13


NOTE 2. AGREEMENTS            The Trust  has an  Investment  Advisory  Agreement
                              with BlackRock  Advisors,  Inc., (the  "Advisor"),
which is 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
investment  assets.  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 investment assets.

   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.

NOTE 3. PORTFOLIO             Purchases  and sales of  investments,  other  than
SECURITIES                    short-term  investments,  for the six months ended
                              June   30,   2001,   aggregated   $5,348,848   and
$4,594,000, respectively.

   The Federal income tax basis of the Trust's  investments at June 30, 2001 was
$671,164,070,  and  accordingly,  net unrealized  appreciation  was  $50,560,212
(gross  unrealized  appreciation--$50,577,245,   gross  unrealized  depreciation
--$17,033).

   For Federal income tax purposes, the Trust had a capital loss carryforward at
December 31, 2000 of approximately  $53,000 of which $34,000 will expire in 2007
and $19,000 will expire in 2008.  Accordingly,  no capital gain  distribution is
expected to be paid to shareholders until net gains have been realized in excess
of such amounts.

NOTE 4. CAPITAL               There  are 200  million  shares  of $.01 par value
                              common stock authorized. The Trust may classify or
reclassify  any  unissued  shares of  common  stock  into one or more  series of
preferred stock. Of the 27,207,093  common shares  outstanding at June 30, 2001,
the Advisor owned 7,093 shares. As of June 30, 2001, 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, which includes 2,600 shares of Series T7 issued
on March 10, 2000.

   On March 10, 2000,  the Trust  reclassified  2,600 shares of common stock and
issued an additional 2,600 shares of Series T7 preferred shares.  The additional
shares  issued have  identical  rights and  features of the  existing  Series T7
preferred  shares.   Estimated  offering  costs  of  $317,160  and  underwriting
discounts of $650,000  have been charged to paid-in  capital in excess of par of
the common shares.

   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 2.40% to 5.10% during the six months ended June 30,
2001.

   The Trust may not declare dividends or make other  distributions on shares of
common  stock 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  stock is 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 stock is 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  stock have voting  rights  equal to the holders of
common stock (one vote per share) and will vote  together with holders of shares
of common stock as a single class. However,  holders of preferred stock 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 stock,  voting separately as a class would be required to
(a) adopt any plan of  reorganization  that would adversely affect the preferred
stock, 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,  2001,   the  Board  of
                              Directors  of the Trust  declared a dividend  from
                              undistributed  earnings  of  $0.06625  per  common
                              share payable,  August 1, 2001 to  shareholders of
                              record on July 16, 2001.

   For the period July 1, 2001 to July 31, 2001 dividends  declared on preferred
shares totalled  $591,555 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 State Street Bank and Trust  Company (the "Plan  Agent") in Trust
shares  pursuant to the Plan.  Shareholders  who elect not to participate in the
Plan will  receive  all  distributions  in cash  paid by check in United  States
dollars 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 transfer agent, as
dividend disbursing 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, as agent for the  participants,  receive the
cash  payment and use it to buy Trust  shares in the open market on the New York
Stock Exchange or elsewhere for the participants'  accounts.  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 in connection with the  reinvestment of dividends
and  distributions.  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 as applied to
any dividend or  distribution  paid  subsequent to written  notice of the change
sent to all  shareholders  of the Trust at least 90 days  before the record date
for the dividend or distribution.  The Plan also may be amended or terminated by
the Plan Agent upon at least 90 days written notice to all  shareholders  of the
Trust.  All  correspondence  concerning  the Plan should be directed to the Plan
Agent at (800) 699-1BFM. The address is on the front of this report.

                                       15


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

      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.

      ANNUAL MEETING OF TRUST SHAREHOLDERS.  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.

      The Annual Meeting of Trust  Shareholders was held May 24, 2001 to vote on
      the following matter: (1) To elect three Directors as follows:

         DIRECTOR:                    CLASS           TERM            EXPIRING
         -------                      -----           -----            -------
         Frank J. Fabozzi ........     II            3 years            2004
         Walter F. Mondale .......     II            3 years            2004
         Ralph L. Schlosstein ....     II            3 years            2004

         Directors whose term of office continues beyond this meeting are Andrew
         F. Brimmer, Richard E. Cavanagh, Kent Dixon, Laurence D. Fink and James
         Clayburn La Force, Jr.

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

                                      VOTES FOR*    VOTES AGAINST*  ABSTENTIONS*
                                       --------      ------------    ----------
         Frank J. Fabozzi ........        10,609          --                 3
         Walter F. Mondale .......    25,662,596          --           534,341
         Ralph L. Schlosstein ....    25,742,327          --           454,610

----------
* The votes  represent  common  and  preferred  shareholders  voting as a single
  class,  except  for  Frank J.  Fabozzi  who was  voted on and  elected  by the
  preferred shareholders only.

                                       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  objective is 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
$213 billion of assets under management as of June 30, 2001.  BlackRock  manages
assets on  behalf  of more  than  3,300  institutions  and  200,000  individuals
worldwide, including nine of the ten largest companies in the U.S. as determined
by Fortune Magazine,  through a variety of equity,  fixed income,  liquidity and
alternative  investment  separate  accounts  and  mutual  funds,  including  the
BLACKROCK  FUNDS and  BLACKROCK  PROVIDENT  INSTITUTIONAL  FUNDS.  In  addition,
BlackRock  provides risk management and technology  services to a growing number
of  institutional  investors  under the BLACKROCK  SOLUTIONS  name.  Clients are
served from  BlackRock's  headquarters  in New York City,  as well as offices in
Wilmington, DE, Edinburgh, Scotland, Tokyo, Japan, and Hong Kong. BlackRock is a
member of The PNC Financial  Services Group,  Inc.  ("PNC"),  one of the largest
diversified  financial  services  organizations  in the  United  States,  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)
at maturity.  The Advisor will implement a conservative  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 small 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 will be reinvested
in securities  with  maturities  which  coincide with the remaining  term of the
Trust.  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 the Trust's transfer agent,
State  Street  Bank and Trust  Company.  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 A TERM TRUST

Under current  market  conditions,  leverage  increases the income earned by the
Trust.  The Trust employs leverage  primarily  through the issuance of preferred
stock.  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 also increases the duration (or price  volatility of the net assets) of
the Trust,  which can improve the  performance  of the Trust in a declining rate
environment,  but can cause net  assets to decline  faster  than the market in a
rapidly rising 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 TERM TRUSTS

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

RETURN OF INITIAL  INVESTMENT.  Although the objective of the Trust is to return
its initial offering price upon termination, there can be no assurance that this
objective will be achieved.

DIVIDEND CONSIDERATION. 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 stock,
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.

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. An investment in these securities involves 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.

MUNICIPAL OBLIGATIONS.  Municipal obligations include debt obligations issued by
states,  cities, and local authorities,  and possessions and certain territories
of the United States to obtain funds for various public purposes,  including the
construction of public  facilities,  the refinancing of outstanding  obligations
and the obtaining of funds for general operating expenses and for loans to other
public  institutions  and  facilities.  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.

ALTERNATIVE  MINIMUM TAX (AMT).  The Trust may invest in  securities  subject to
AMT. The Trust currently holds no securities that are subject to AMT.

                                       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 fund invests in a portfolio of
                                   securities  in  accordance  with  its  stated
                                   investment objectives and policies.

DISCOUNT:                          When a fund's net asset value is greater than
                                   its  stock  price  the  fund  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:             Shareholders   may  have  all  dividends  and
                                   distributions of capital gains  automatically
                                   reinvested into additional shares of a fund.

MARKET PRICE:                      Price per share of a security  trading in the
                                   secondary market. For a closed-end fund, this
                                   is the  price at which  one share of the fund
                                   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,    plus   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 fund's stock price is greater than its
                                   net  asset  value,  the  fund  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 retire
                                   the  bond  in  full  at the  date  indicated,
                                   typically at a premium to par.

                                       19

BLACKROCK [LOGO]

DIRECTORS
Laurence D. Fink, CHAIRMAN
Andrew F. Brimmer
Richard E. Cavanagh
Kent Dixon
Frank J. Fabozzi
James Clayburn La Force, Jr.
Walter F. Mondale
Ralph L. Schlosstein

OFFICERS
Ralph L. Schlosstein, PRESIDENT
Keith T. Anderson, VICE PRESIDENT
Michael C. Huebsch, VICE PRESIDENT
Robert S. Kapito, VICE 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 AND TRANSFER AGENT
State Street Bank and Trust Company
One Heritage Drive
North Quincy, MA 02171
(800) 699-1BFM

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

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

LEGAL COUNSEL
Skadden, Arps, Slate, Meagher & Flom LLP
Four 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, 2001 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 any securities.

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

                             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-30-7
                                                                     09247K-40-6
[Logo] Printed on recycled paper                                     09247K-50-5


THE BLACKROCK
INSURED MUNICIPAL
2008 TERM
TRUST INC.
==========================
SEMI-ANNUAL REPORT
JUNE 30, 2001



BLACKROCK [LOGO]