Anchor changes at ABC's two biggest newscasts did nothing during the week of Dec. 21-27 to shake NBC's dominance in the ratings. NBC's "Nightly News" with Brian Williams averaged 9.37 million viewers on the first week Diane Sawyer anchored ABC's "World News." The ABC broadcast averaged 8.56 million viewers. Sawyer had just under 9 million viewers for her first newscast, while Williams had 9.7 million viewers that day, the Nielsen Co. said. Katie Couric's CBS newscast averaged 6.2 million viewers. During Sawyer's debut week, ABC had its biggest lead over CBS in more than a year.

NBC's "Today" show won easily during the first week for ABC's new "Good Morning America" team of George Stephanopoulos and Robin Roberts. "Today," which hasn't lost a week in the ratings in more than a decade, averaged just under 6 million viewers, during Stephanopoulos' first week, while "Good Morning America" had 4.6 million.

It was a different story in prime time, where CBS dominated a holiday week stuffed primarily with reruns and seasonal specials. NBC's telecast of Sunday night's NFL game between Dallas and Washington was the week's most watched program.

For the week, network averages were: CBS, 11.8 million viewers (7.3 rating, 12 share); ABC, 9.3 million (5.9, 10); Fox, 8.8 million (5.2, 8); NBC, 7.8 million (4.9, 8); CW, 2.2 million (1.5, 2); ION, 940,000 (0.6, 1).

ASSOCIATED PRESS

1 NFL Football: Dallas at Washington (NBC)

2 60 Minutes (CBS)

3 NCIS (CBS)

4 Sunday Night NFL Pre-Kick (NBC)

5 NCIS: Los Angeles (CBS)

6 Movie: "Jesse Stone: Thin Ice" (CBS)

7 Two and a Half Men (CBS)

8 Criminal Minds (CBS)

9 CSI: NY (CBS)

10 The Big Bang Theory (CBS)

11 Football Night in America (NBC)

12 The Good Wife (CBS)

13 CSI: Miami (CBS)

14 The Mentalist (CBS)

15 Sing Off (NBC)

16 Cold Case (CBS)

17 CSI: Crime Scene Investigation (CBS)

18 How the Grinch Stole Christmas (ABC)

19 Movie "The Sound of Music" (ABC)

20 Home For the Holidays (CBS)