<SUBMISSION>
<ACCESSION-NUMBER>0000950123-02-005712
<TYPE>SC 13D/A
<PUBLIC-DOCUMENT-COUNT>2
<FILING-DATE>20020529
<SUBJECT-COMPANY>
<COMPANY-DATA>
<CONFORMED-NAME>ACTV INC /DE/
<CIK>0000854152
<ASSIGNED-SIC>3663
<IRS-NUMBER>942907258
<STATE-OF-INCORPORATION>DE
<FISCAL-YEAR-END>1231
</COMPANY-DATA>
<FILING-VALUES>
<FORM-TYPE>SC 13D/A
<ACT>34
<FILE-NUMBER>005-41394
<FILM-NUMBER>02664137
</FILING-VALUES>
<BUSINESS-ADDRESS>
<STREET1>1270 AVE OF THE AMERICAS
<CITY>NEW YORK
<STATE>NY
<ZIP>10020
<PHONE>2122622571
</BUSINESS-ADDRESS>
<MAIL-ADDRESS>
<STREET1>12270 AVE OF THE AMERICAS #2401
<STREET2>12270 AVE OF THE AMERICAS #2401
<CITY>NEW YORK
<STATE>NY
<ZIP>10020
</MAIL-ADDRESS>
</SUBJECT-COMPANY>
<FILED-BY>
<COMPANY-DATA>
<CONFORMED-NAME>LIBERTY MEDIA CORP /DE/
<CIK>0001082114
<ASSIGNED-SIC>4841
<IRS-NUMBER>841288730
<STATE-OF-INCORPORATION>DE
<FISCAL-YEAR-END>1231
</COMPANY-DATA>
<FILING-VALUES>
<FORM-TYPE>SC 13D/A
</FILING-VALUES>
<BUSINESS-ADDRESS>
<STREET1>9197 SOUTH PEORIA STREET
<CITY>ENGLEWOOD
<STATE>CO
<ZIP>80112
<PHONE>7208755400
</BUSINESS-ADDRESS>
<MAIL-ADDRESS>
<STREET1>9197 SOUTH PEORIA STREET
<CITY>ENGLEWOOD
<STATE>CO
<ZIP>80112
</MAIL-ADDRESS>
</FILED-BY>
<DOCUMENT>
<TYPE>SC 13D/A
<SEQUENCE>1
<FILENAME>y61109sc13dza.txt
<DESCRIPTION>AMENDMENT TO SCHEDULE 13D
<TEXT>
<PAGE>



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

                                 SCHEDULE 13D/A
                                (AMENDMENT NO. 3)
                    UNDER THE SECURITIES EXCHANGE ACT OF 1934


                                   ACTV, Inc.
--------------------------------------------------------------------------------
                                (Name of Issuer)

                          Common Stock, $.10 par value
--------------------------------------------------------------------------------
                         (Title of Class of Securities)

                                  000 88E 10 4
                      -------------------------------------
                                 (CUSIP Number)

                                Charles Y. Tanabe
                    Senior Vice President and General Counsel
                            Liberty Media Corporation
                  12300 Liberty Boulevard, Englewood, CO 80112
                                 (720) 875-5400
--------------------------------------------------------------------------------
                  (Name, Address and Telephone Number of Person
                Authorized to Receive Notices and Communications)

                                   May 8, 2002
             (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 Rule 13d-1(e), 13d-1(f) or 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(b) for
other parties to whom copies are to be sent.

                         (Continued on following pages)

                                Page 1 of 9 Pages

----------
*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).





<PAGE>

CUSIP No. 000 88E 10 4



--------------------------------------------------------------------------------
1      NAMES OF REPORTING PERSONS:
       I.R.S. IDENTIFICATION NOS. OF ABOVE PERSONS (ENTITIES ONLY):


       Liberty Media Corporation
       84-1288730
--------------------------------------------------------------------------------
2      CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP

       (a)   [ ]
       (b)   [ ]

--------------------------------------------------------------------------------
3      SEC USE ONLY

--------------------------------------------------------------------------------
4      SOURCE OF FUNDS WC

--------------------------------------------------------------------------------
5      CHECK IF DISCLOSURE OF LEGAL PROCEEDINGS IS REQUIRED PURSUANT TO
       ITEMS 2(d) or 2(e)                                               [ ]

--------------------------------------------------------------------------------
6      CITIZENSHIP OR PLACE OF ORGANIZATION:
       Delaware

--------------------------------------------------------------------------------
 NUMBER OF         7      SOLE VOTING POWER

   SHARES                 8,810,000 Shares
                   -------------------------------------------------------------
BENEFICIALLY       8      SHARED VOTING POWER

  OWNED BY                0 Shares
                   -------------------------------------------------------------
   EACH            9      SOLE DISPOSITIVE POWER

 REPORTING                 8,810,000 Shares
                   -------------------------------------------------------------
   PERSON          10      SHARED DISPOSITIVE POWER

    WITH:                  0 Shares
--------------------------------------------------------------------------------
11     AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON

       8,810,000 Shares
--------------------------------------------------------------------------------
12     CHECK IF THE AGGREGATE AMOUNT IN ROW (11) EXCLUDES CERTAIN SHARES

                                                                        [ ]
--------------------------------------------------------------------------------
13     PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (11)

       15.8%
--------------------------------------------------------------------------------
14     TYPE OF REPORTING PERSON

       CO
--------------------------------------------------------------------------------


                               Page 2 of 9 Pages

<PAGE>


CUSIP No. 000 88E 10 4


                       SECURITIES AND EXCHANGE COMMISSION
                             WASHINGTON, D.C. 20549



                                 SCHEDULE 13D/A
                                (AMENDMENT NO. 3)



                                  STATEMENT OF

                            LIBERTY MEDIA CORPORATION

        PURSUANT TO SECTION 13(D) OF THE SECURITIES EXCHANGE ACT OF 1934

                                  IN RESPECT OF

                                   ACTV, INC.

         The above Schedule 13D, filed on March 29, 1999, as heretofore amended
by Amendment No. 1 filed on October 28, 1999 and Amendment No. 2 filed on July
13, 2000, is hereby further amended as follows (terms not otherwise defined
herein have the meanings assigned thereto in the Schedule 13D):

ITEM 1.  SECURITY AND ISSUER.

         Liberty Media Corporation, a Delaware corporation ( "Liberty" or the
"Reporting Person") hereby amends its Statement on Schedule 13D (the
"Statement") with respect to shares (the "Shares") of the Common Stock, par
value $.10 per share (the "Common Stock"), of ACTV, Inc. (the "Issuer")
beneficially owned by the Reporting Person. The Issuer's principal executive
offices are located at 233 Park Avenue South, New York, New York 10003.

ITEM 2.  IDENTITY AND BACKGROUND

         Item 2 is hereby amended and restated to read in its entirety as
follows:

         On August 10, 2001, AT&T Corp. ("AT&T"), the former parent corporation
of Liberty, redeemed (the "Redemption") each outstanding share of Class A
Liberty Media Group common stock, par value $1.00 per share (the "Class A
Liberty Media Group Common Stock"), and Class B Liberty Media Group common
stock, par value $1.00 per share (the "Class B Liberty Media Group Common Stock"
and together with the Class A Liberty Media Group Common Stock, the "Liberty
Media Group Common Stock"), in exchange for one share of a corresponding series
of common stock of Liberty. Prior to the Redemption, the Liberty Media Group
Common Stock was a tracking stock of AT&T intended to reflect the economic
performance of the businesses and assets attributed to AT&T's Liberty Media
Group. Upon the redemption, Liberty became the holder of all of the businesses
and assets formerly attributed to AT&T's Liberty Media

                               Page 3 of 9 Pages


<PAGE>


CUSIP No. 000 88E 10 4


Group. As a result of the Redemption, Liberty became an independent, publicly
traded company.

         Liberty owns interests in a broad range of video programming and
communications businesses in the United States, Europe, South America and Asia.
Liberty Media's principal assets include interests in Starz Encore Group LLC,
Liberty Livewire Corporation, On Command Corporation, Discovery Communications,
Inc., AOL Time Warner Inc., QVC, Inc., USA Interactive, Inc., Telewest
Communications plc, Motorola, Inc., Sprint PCS Group, The News Corporation
Limited and Vivendi Universal, S.A.

         Liberty's principal business address is 12300 Liberty Boulevard,
Englewood, Colorado 80112. Schedule 1 attached to this Statement contains the
following information concerning each director, executive officer and
controlling person of Liberty: (i) name and residence or business address; (ii)
principal occupation or employment; and (iii) the name, principal business and
address of any corporation or other organization in which such employment is
conducted. Schedule 1 is incorporated herein by reference and amends and
restates Schedule 1 and Schedule 2 to this Statement in their entirety.

         To the knowledge of Liberty, each of the persons named on Schedule 1
(the "Schedule 1 Persons") is a United States citizen, except for David J.A.
Flowers, who is a Canadian citizen. During the last five years, neither Liberty
nor any of the Schedule 1 Persons (to the knowledge of Liberty) has been
convicted in a criminal proceeding (excluding traffic violations or similar
misdemeanors). During the last five years, neither Liberty nor any of the
Schedule 1 Persons (to the knowledge of Liberty) has been a party to a civil
proceeding of a judicial or administrative body of competent jurisdiction and,
as a result of such proceeding, is or was subject to a judgment, decree or final
order enjoining future violations of, or prohibiting or mandating activities
subject to, federal or state securities laws or finding any violation with
respect to such laws.

ITEM 4.  PURPOSE OF THE TRANSACTION.

         Item 4 is hereby amended and restated to read in its entirety as
follows:

         On May 8, 2002, the Issuer announced that it had entered into an
agreement with Liberty, dated as of May 3, 2002 (the "Letter Agreement"),
regarding the possible acquisition by Liberty of all of the outstanding shares
of Common Stock. Under the terms of the Letter Agreement and subject to the
conditions thereof, Liberty, directly or through one of its subsidiaries or
affiliates, would acquire all of the outstanding shares of Common Stock not
already owned by Liberty at a price per share equal to $2.00 (the "Proposed
Transaction"). The purchase price would be payable in either cash, shares of
Liberty Series A Common Stock, or, upon the mutual agreement of the Issuer and
Liberty, the publicly traded common stock of a subsidiary or affiliate of
Liberty.

         Pursuant to the Letter Agreement, the Issuer entered into a 65-day
exclusive negotiating period (the "Exclusive Period") with respect to the
Proposed Transaction, during which Liberty will conduct its due diligence and
Liberty and the Issuer will negotiate the definitive terms of the Proposed
Transaction. In the event the Exclusive Period ends without the execution of a

                               Page 4 of 9 Pages


<PAGE>


CUSIP No. 000 88E 10 4


definitive agreement, Liberty may elect, by the first business day following the
last day of the Exclusive Period, to require the Issuer to enter into a merger
agreement or other agreement providing for a business combination between the
Issuer and Liberty (or a Liberty subsidiary or affiliate) in which the
stockholders of the Issuer would receive consideration of $2.00 per share
payable, at Liberty's option, in cash or shares of Liberty Series A Common
Stock, or, upon the mutual agreement of the Issuer and Liberty, the publicly
traded common stock of a subsidiary or affiliate of Liberty.

         The execution of the Letter Agreement does not give rise to any
obligation on the part of Liberty to enter into a definitive agreement with
respect to the Proposed Transaction or to otherwise acquire (directly or
indirectly) any additional shares of Common Stock. If Liberty determines to
proceed with the Proposed Transaction, consummation thereof would be subject to
certain conditions, including obtaining certain regulatory approvals and the
approval of the Issuer's stockholders.

         Liberty has not reached any conclusion concerning its course of action
if it does not proceed with or ultimately consummate the Proposed Transaction as
contemplated by the Letter Agreement and Liberty reserves the right to take, in
such event, any lawful action which it deems desirable, including disposing of
all or a portion of the shares of the Common Stock beneficially owned by it,
continuing to hold all or a portion of such shares, or taking any other
available course of action, which could result in the occurrence of any or all
of the events listed in the last paragraph of this Item 4.

         In reaching any conclusion as to its future course of action, Liberty
will take into consideration various factors, including but not limited to, the
Issuer's business and prospects, developments concerning the Issuer, other
business opportunities available to it, developments with respect to its or the
Issuer's business, general economic conditions, and financial and stock market
conditions.

         Liberty reserves the right, subject to applicable law and its agreement
with the Issuer described in Item 6 of the Statement, to acquire additional
shares of Common Stock through open-market purchases, privately negotiated
transactions or otherwise.

         Except as described above in this Item 4, Liberty does not have any
present plans or proposals which relate to or would result in: (i) the
acquisition by any person of additional securities of the Issuer, or the
disposition of securities of the Issuer; (ii) an extraordinary corporate
transaction, such as a merger, reorganization or liquidation, involving the
Issuer or any of its subsidiaries; (iii) a sale or transfer of a material amount
of assets of the Issuer or any of its subsidiaries; (iv) any change in the
present Board of Directors or management of the Issuer, including any plans or
proposals to change the number or term of directors or to fill any existing
vacancies on the Issuer's board; (v) any material change in the present
capitalization or dividend policy of the Issuer; (vi) any other material change
in the Issuer's business or corporate structure; (vii) changes in the Issuer's
charter, by-laws or instruments corresponding thereto or other actions which may
impede the acquisition of control of the Issuer by any person; (viii) causing a
class of securities of the Issuer to be delisted from a national securities
exchange or to cease to be authorized to be quoted in an inter-dealer quotation
system of a registered national securities association; (ix) a class of equity
securities of the Issuer becoming eligible for termination

                                Page 5 of 9 Pages


<PAGE>


CUSIP No. 000 88E 10 4


of registration pursuant to Section 12(g)(4) of the Securities Exchange Act of
1934, as amended; or (x) any action similar to any of those enumerated above.

ITEM 5.  INTEREST IN SECURITIES OF THE ISSUER.

         Item 5(a) is hereby amended and restated to read in its entirety as
follows:

         (a) The Reporting Person presently beneficially owns 8,810,000 Shares
of Common Stock which represent approximately 15.8% of the 55,887,327 Shares of
Common Stock outstanding as of April 11, 2002. The total number of Shares
outstanding and the percentage held by the Reporting Person are based on the
representations of the Issuer contained in the Form 10-K for the year ended
December 31, 2001 filed with the Securities and Exchange Commission on April 12,
2000.

         To the best knowledge of the Reporting Person, none of the persons
listed in Schedule 1 to this Statement has any interest in any securities of the
Issuer.

ITEM 7.  MATERIAL TO BE FILED AS EXHIBITS.

         Item 7 is hereby amended to include the following Exhibit:

         (a) - Press Release dated May 8, 2002 announcing the execution of a
Letter Agreement by and between ACTV, Inc. and Liberty Media Corporation.


                                Page 6 of 9 Pages


<PAGE>


CUSIP No. 000 88E 10 4


                                    SIGNATURE

         After reasonable inquiry and to the best of my knowledge and belief, I
certify that the information set forth in this Statement is true, complete and
correct.

May 22, 2002                             LIBERTY MEDIA CORPORATION

                                         By: /s/Elizabeth M. Markowski
                                         -----------------------------------
                                         Name:     Elizabeth M. Markowski
                                         Title:    Senior Vice President



                                Page 7 of 9 Pages



<PAGE>


CUSIP No. 000 88E 10 4


Schedule 1 of the Schedule 13D is hereby amended and restated to read in its
entirety as follows:

                                   SCHEDULE 1

          DIRECTORS AND EXECUTIVE OFFICERS OF LIBERTY MEDIA CORPORATION

         The name and present principal occupation of each director and
executive officer of Liberty Media Corporation is set forth below. Unless
otherwise noted, the business address for each person listed below is c/o
Liberty Media Corporation, 12300 Liberty Boulevard, Englewood, Colorado 80112.
All executive officers and directors listed on this Schedule 1 are United States
citizens, except for David J.A. Flowers, who is a Canadian citizen.

<TABLE>
<CAPTION>
Name and Business Address              Principal Occupation
-------------------------              --------------------
<S>                                    <C>
John C. Malone                         Chairman of the Board and Director of Liberty

Robert R. Bennett                      President, Chief Executive Officer and Director
                                       of Liberty

Donne F. Fisher                        Director of Liberty; President of Fisher Capital
                                       Partners Ltd.

Gary S. Howard                         Executive Vice President, Chief Operating Officer
                                       and Director of Liberty; Chairman of the Board
                                       and Director of Liberty Satellite & Technology,
                                       Inc.

Paul A. Gould                          Director of Liberty; Managing Director of Allen &
     Allen & Company Incorporated      Company Incorporated
     711 5th Avenue, 8th Floor
     New York, NY 10022

Jerome H. Kern                         Director of Liberty; Consultant, Kern Consulting
     Kern Consulting LLC               LLC
     4600 S. Syracuse Street
     Denver, CO 80237

Larry E. Romrell                       Director of Liberty

David J.A. Flowers                     Senior Vice President and Treasurer of Liberty

Elizabeth M. Markowski                 Senior Vice President of Liberty

Charles Y. Tanabe                      Senior Vice President, General Counsel and
                                       Secretary of Liberty

Albert E. Rosenthaler                  Senior Vice President of Liberty

Christopher W. Shean                   Senior Vice President and Controller of Liberty
</TABLE>


                                Page 8 of 9 Pages



</TEXT>
</DOCUMENT>
<DOCUMENT>
<TYPE>EX-99.7.A
<SEQUENCE>3
<FILENAME>y61109exv99w7wa.txt
<DESCRIPTION>PRESS RELEASE
<TEXT>
<PAGE>


CUSIP No. 000 88E 10 4


                                                                    EXHIBIT 7(a)

                 ACTV SIGNS LETTER AGREEMENT WITH LIBERTY MEDIA

         NEW YORK, May 8 /PRNewswire-FirstCall/ -- ACTV, Inc. (Nasdaq: IATV)
reported today that it has signed a letter agreement with Liberty Media
Corporation (NYSE: L) regarding a possible acquisition of all outstanding shares
of ACTV common stock.

         Under the terms of the letter agreement, Liberty, which currently owns
approximately 16% of ACTV's outstanding shares, would purchase all remaining
shares at a price of $2.00 per share. Such purchase price would be payable in
either cash, shares of Liberty Series A common stock, or the publicly traded
common stock of a Liberty subsidiary or affiliate. ACTV has entered into a
65-day exclusive negotiating period with Liberty with respect to the possible
transaction, during which Liberty will conduct due diligence and negotiate
definitive terms with ACTV. Should the exclusive period end without either a
signed definitive agreement between the parties, or a decision by either party
not to proceed with the possible transaction, Liberty may elect, for a period of
one day following the end of the exclusive period, to acquire the remaining
outstanding shares of ACTV at a price of $2.00 per share.

         Neither Liberty nor ACTV can provide any assurances that a definitive
agreement will be reached, or that a transaction ultimately will be consummated.
Any potential transaction calling for the acquisition of all outstanding shares
of ACTV common stock would require board approval of Liberty Media and ACTV as
well as ACTV shareholder approval.

         ACTV is being advised in this matter by Friedman, Billings, Ramsey &
Co., Inc.

ABOUT ACTV, INC.

         ACTV, Inc. (Nasdaq: IATV) is a digital media company providing
proprietary technologies, tools, and technical and creative services for
interactive TV advertising, personalized programming applications and enhanced
media. For more information, visit www.actv.com.

         This news release contains forward-looking statements as defined by the
Private Securities Litigation Reform Act of 1995. Forward-looking statements
include statements concerning plans, objectives, goals, strategies, future
events or performance, and underlying assumptions and other statements which are
other than statements of historical facts. These statements are subject to
uncertainties and risks including, but not limited to, product and service
demand and acceptance, changes in technology, economic conditions, the impact of
competition and pricing, government regulation, and other risks defined in this
document and in statements filed from time to time with the Securities and
Exchange Commission. All such forward-looking statements, whether written or
oral, and whether made by or on behalf of the companies, are expressly qualified
by the cautionary statements and any other cautionary statements which may
accompany the forward-looking statements. In addition, the companies disclaim
any obligation to update any forward-looking statements to reflect events or
circumstances after the date hereof.



                                Page 9 of 9 Pages

</TEXT>
</DOCUMENT>
</SUBMISSION>
