In week 12 of the 2008-9 season (December 8-14), CBS had the largest audience, the most adults 18-49 and the most adults 25-54. Boosted by Sunday Night Football, NBC had the most adults 18-18-34 for the week. ABC and Fox were well back in all demos for the week.

CBS’s average viewership of 11.92 million beat down second place NBC by over 3 million viewers, a huge margin. Fox and ABC were each another 2+ million behind. For demo adults 18-49 it was also CBS just over NBC by 4.39 million to 4.17 million. CBS also won demo adults 25-54 over NBC by 5.30 million to 4.45 million viewers, with Fox in third (3.01 million) and ABC (2.85 million) fourth. In adults 18-34, NBC lead with 1.87 million to 1.47 million for CBS.

Tiny Network Smackdown! This week MyNetworkTV almost beat the CW in every demo, topping it in average viewers, adults 18-49 and adults 25-54 and finishing behind in adults 18-34 by a mere 10,000. Could we see a MyNet tiny network sweep next week?

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Nielsen TV Ratings Data: ©2008 The Nielsen Company. All Rights Reserved.