UNITED STATES
                       SECURITIES AND EXCHANGE COMMISSION
                             Washington, D.C. 20549

                                  SCHEDULE 13D

                    Under the Securities Exchange Act of 1934
                               (Amendment No. 4)*

                                Blockbuster Inc.
                                (Name of Issuer)

                              Class A Common Stock
                              Class B Common Stock
                         (Title of Class of Securities)

                               Class A: 093679108
                               Class B: 093679207
                                 (CUSIP Number)

                               Marc Weitzen, Esq.
                                 General Counsel
                  Icahn Associates Corp. & affiliated companies
                          767 Fifth Avenue, 47th Floor
                            New York, New York 10153
                                 (212) 702-4388

           (Name, Address and Telephone Number of Person Authorized to
                       Receive Notices and Communications)

                                 April 18, 2005
             (Date of Event which Requires Filing of this Statement)

If the filing person has previously  filed a statement on Schedule 13G to report
the  acquisition  that is the subject of this  Schedule  13D, and is filing this
schedule  because of "  240.13d-1(e),  240.13d-1(f) or  240.13d-1(g),  check the
following box / /.

NOTE:  Schedules  filed in paper format shall include a signed original and five
copies of the schedule, including all exhibits. See Rule 13d-7 for other parties
to whom copies are to be sent.

*The  remainder of this cover page shall be filled out for a reporting  person's
initial filing on this form with respect to the subject class of securities, and
for  any  subsequent   amendment   containing   information  which  would  alter
disclosures provided in a prior cover page.

The information required on the remainder of this cover page shall not be deemed
to be "filed" for the purpose of Section 18 of the  Securities  Exchange  Act of
1934 ("Act") or otherwise  subject to the liabilities of that section of the Act
but  shall be  subject  to all other  provisions  of the Act  (however,  see the
Notes).






                                  SCHEDULE 13D

Item 1.  Security and Issuer

         This  Statement  constitutes  Amendment  No.  4  to  the  Schedule  13D
previously filed on December 14, 2004 and amended on February 17, 2005, April 7,
2005 and April 8, 2005. All capitalized  terms not otherwise  defined shall have
the meaning ascribed to such terms in the previously filed statement on Schedule
13D.


Item 4.  Purpose of Transaction

         Item 4 is hereby amended to add the following:

         On April 18, 2005,  Mr. Icahn  expressed  his belief that Issuer should
put itself up for sale.

SECURITY  HOLDERS ARE ADVISED TO READ THE PROXY  STATEMENT  AND OTHER  DOCUMENTS
RELATED TO  SOLICITATION  OF PROXIES BY MR.  ICAHN AND HIS  AFFILIATES  FROM THE
STOCKHOLDERS  OF BLOCKBUSTER  INC. FOR USE AT ITS ANNUAL MEETING (A) WHEN AND IF
THEY  BECOME  AVAILABLE,   BECAUSE  THEY  WILL  CONTAIN  IMPORTANT  INFORMATION,
INCLUDING   INFORMATION   RELATING  TO  THE   PARTICIPANTS  IN  ANY  SUCH  PROXY
SOLICITATION,  AND (B) WHEN AND IF COMPLETED, A DEFINITIVE PROXY STATEMENT AND A
FORM OF PROXY WHICH WILL BE MAILED TO STOCKHOLDERS OF BLOCKBUSTER  INC. AND WILL
BE AVAILABLE AT NO CHARGE AT THE SECURITIES AND EXCHANGE COMMISSION'S WEBSITE AT
HTTP://WWW.SEC.GOV.








                                            SIGNATURE

         After  reasonable  inquiry  and to the best of each of the  undersigned
knowledge and belief, each of the undersigned certifies that the information set
forth in this statement is true, complete and correct.

Dated: April 19, 2005


                             HOPPER INVESTMENTS LLC

         By:   Barberry Corp.


          By:      /s/ Edward E. Mattner
          Name: Edward E. Mattner
          Title: Authorized Signatory

BARBERRY CORP.


         By:      /s/ Edward E. Mattner
         Name: Edward E. Mattner
         Title: Authorized Signatory


HIGH RIVER LIMITED PARTNERSHIP

By:      Hopper Investments LLC, General Partner

         By:  Barberry Corp., member


         By:      /s/ Edward E. Mattner
                  Name: Edward E. Mattner
                  Title: Authorized Signatory

ICAHN PARTNERS MASTER FUND L.P.

         By:      /s/ Edward E. Mattner
         Name: Edward E. Mattner
         Title: Authorized Signatory


       [Signature Page of Amendment #4 to Schedule 13D - Blockbuster Inc.]










ICAHN OFFSHORE L.P.

         By:      /s/ Edward E. Mattner
         Name: Edward E. Mattner
         Title: Authorized Signatory

CCI OFFSHORE LLC

         By:      /s/ Edward E. Mattner
         Name: Edward E. Mattner
         Title: Authorized Signatory

ICAHN PARTNERS L.P.

         By:      /s/ Edward E. Mattner
         Name: Edward E. Mattner
         Title: Authorized Signatory

ICAHN ONSHORE L.P.

         By:      /s/ Edward E. Mattner
         Name: Edward E. Mattner
         Title: Authorized Signatory

CCI ONSHORE LLC

         By:      /s/ Edward E. Mattner
         Name: Edward E. Mattner
         Title: Authorized Signatory


ICAHN & CO., INC.

         By:      /s/ Irene S. March
         Name: Irene S. March
         Title: Controller


/s/ Carl C. Icahn_____________
-----------------
CARL C. ICAHN


       [Signature Page of Amendment #4 to Schedule 13D - Blockbuster Inc.]