First Amendment to the Credit Agreement

Exhibit 10.21

FIRST AMENDMENT

     FIRST AMENDMENT (this “Amendment”), dated as of December 31, 2005, to the Credit Agreement dated as of November 4, 2005 (the “Credit Agreement”), among LIN Television Corporation, a Delaware corporation (the “Borrower”), Televicentro of Puerto Rico, LLC, a Delaware limited liability company (the “Permitted Borrower”), the several banks and other institutions from time to time parties thereto (the “Lenders”), JPMorgan Chase Bank, N.A., as administrative agent (in such capacity, the “Administrative Agent”), as an issuing lender (in such capacity, an “Issuing Lender”), and as swingline lender (in such capacity, the “Swingline Lender”), Deutsche Bank Trust Company Americas, as syndication agent (in such capacity, the “Syndication Agent”) and as an Issuing Lender, Goldman Sachs Credit Partners, L.P., Bank of America, N.A. and Wachovia Bank, National Association as documentation agents (in such capacity, each a “Documentation Agent”), and The Bank of Nova Scotia and SunTrust Bank, as co-documentation agents (in such capacity, each a “Co-Documentation Agent”), and J.P. Morgan Securities Inc. and Deutsche Bank Securities Inc., as joint lead arrangers and joint bookrunners.

W I T N E S S E T H:

     WHEREAS, pursuant to the Credit Agreement, the Lenders have agreed to make, and have made, certain loans and other extensions of credit to the Borrowers;

     WHEREAS, the Borrowers have requested that certain provisions of the Credit Agreement be amended as set forth herein; and

     WHEREAS, the Lenders are willing to agree to such amendment on the terms set forth herein;

     NOW THEREFORE, in consideration of the premises and mutual covenants contained herein, the undersigned hereby agree as follows:

     I. Defined Terms. Terms defined in the Credit Agreement and used herein shall have the meanings given to them in the Credit Agreement.

     II. Amendments to Section 2.1.

     (a) Section 2.1(a) is hereby amended by adding thereto, at the end thereof, two new sentences reading in their entirety as follows:

“Such apportionment of the Delayed-Draw Term Loans may be changed at any time, and from time to time, by the Borrower by its giving notice of such change to the Administrative Agent, which shall promptly notify the Delayed-Draw Term Lenders thereof. It is understood and agreed that nothing in the definition of “Borrower Delayed-Draw Term Loan Commitments” or “Permitted Borrower Delayed-Draw Term Loan Commitments” shall be construed to prohibit the apportionment of the Delayed-Draw Term Loans in accordance with the previous sentence.”

     (b) Section 2.1(b) is hereby amended by adding thereto, at the end thereof, a new sentence reading in its entirety as follows:

“The apportionment of any Incremental Term Loans between the Borrower and the Permitted Borrower may be changed at any time, and from time to time, by the Borrower by its giving notice of such change to the Administrative Agent, which shall promptly notify the Incremental Term Lenders.”

     III. Amendment to Section 2.3(a). Section 2.3(a) is hereby amended by adding thereto, at the end thereof, two new sentences reading in their entirety as follows:

“Any partial payment of principal will be allocated by the Borrower between the Delayed-Draw Term Loans made to the Borrower and the Delayed-Draw Term Loans made to the Permitted Borrower as directed by the Borrower in a notice to the Administrative Agent prior to any such payment, or in the absence of any such notice ratably between them. The Administrative Agent shall promptly notify each Delayed-Draw Term Lender of such direction.”

     IV. Amendment to Section 2.3(b). Section 2.3(b) is hereby amended by adding thereto, at the end thereof, two new sentences reading in their entirety as follows:

“Any partial payment of principal will be allocated by the Borrower between the Incremental Term Loans made to the Borrower and the Incremental Term Loans made to the Permitted Borrower as directed by the Borrower in a notice to the Administrative Agent prior to any such payment, or in the absence of any such notice ratably between them. The Administrative Agent shall promptly notify each Incremental Term Lender of such direction.”

     V. Amendment to Section 2.8. Section 2.8 is hereby amended by deleting the phrase “Delayed-Draw” each time it appears in the last sentence thereof.

     VI. Amendment to Section 10.6(a). Section 10.6(a) is hereby amended by adding immediately following “(i)” the words “other than as provided in the last two sentences of Section 2.1(a) and in the last sentence of Section 2.1(b).”

     VII. Effective Date. This Amendment shall become effective as of and with effect from the date hereof, on the date on which the Borrower, the Permitted Borrower and each of the Lenders under the Credit Agreement shall have duly executed and delivered to the Administrative Agent this Amendment.

     VIII. Representations and Warranties. The Borrowers hereby represent and warrants that after giving effect to this Amendment, no Default or Event of Default shall have occurred and be continuing.

     IX. No Other Amendments; Confirmation. Except as expressly amended hereby, the provisions of the Credit Agreement, as amended and restated, are and shall remain in full force and effect.

     X. Governing Law. This Amendment and the rights and obligations of the parties hereto shall be governed by, and construed and interpreted in accordance with, the laws of the State of New York.

     XI. Counterparts. This Amendment may be executed by one or more of the parties hereto on any number of separate counterparts, and all of said counterparts taken together shall be deemed

to constitute one and the same instrument. This Amendment may be delivered by facsimile transmission of the relevant signature pages hereof.

     IN WITNESS WHEREOF, the undersigned have caused this Amendment to be executed and delivered by their duly authorized officers as of the date first above written.

The Guarantors hereby consent and agree to this Amendment as of the date hereof and reaffirm their obligations under the Guarantee and Collateral Agreement, the Guarantee and the other Loan Documents to which they are party.