Although CBS was again the most-watched network last week, thus claiming its 11^th consecutive weekly triumph among total viewers, NBC was boosted by the popular Sunday night football game between the New York Giants and Dallas Cowboys and managed to top the prime-time ratings, according to figures released on Tuesday by Nielsen Media Research.

CBS averaged 11.9 million viewers throughout the week ended December 14 and was followed by NBC with 8.8 million viewers, ABC with 6.3 million viewers and Fox with 6 million viewers.

Not only was NBC’s “Sunday Night Football” the week’s most-watched show, as 23.1 million people tuned in for the game, but it also drew the best audiences in the three-year history of the much-loved franchise.

With seven programs in the Top 10 of the week’s most successful shows, CBS gained even more power. “CSI: Crime Scene Investigation” lured 20.86 million viewers and was the second most-watched program of the week, while “60 Minutes,” “Two and a Half Men” and “Criminal Minds” claimed the following positions in the Top 5.

“House” was Fox’s most popular show last week with 14.05 million viewers, while ABC’s ratings were boosted by “A Charlie Brown Christmas,” which lured 11.02 million viewers.

NBC saw a good result from “The Office” as well, which was watched by 8.8 million people, probably because ABC broadcast a previously-aired episode of hit medical drama “Grey’s Anatomy.”

NBC’s “Nightly News” led the evening newscasts with an average of 10 million viewers, ABC’s “World News” came in second with 8.6 million viewers and the “CBS Evening News” drew 7.1 million viewers.