Fast National ratings for Tuesday, December 1, 2009.
A primetime speech from President Obama forced NBC to squeeze out "The Jay Leno Show" for the first time this fall. The result, not so coincidently, was a demographic win for the network. 
Meanwhile, CBS dominated the night overall and the return of a reconstituted "Scrubs" drew ratings very similar to those of the old "Scrubs" (i.e. "low").
Among adults 18-49, NBC won the night with a 3.2 rating. CBS was second with a 2.4 rating, nipping the 2.1 rating for FOX. ABC's 1.6 rating and the 0.9 rating for The CW followed.
Overall, though, CBS averaged an estimated 10.54 million viewers to go with a 6.9 rating/11 share. NBC was a solid second with a 5.9/9, with ABC's 3.5/6 and FOX's 3.4/5 following. The CW trailed with a 1.3/2.
In the 8 p.m. hour, CBS led the way with the Obama speech, plus the start of a "NCIS" episode, which averaged a 6.8/11. NBC was second with the speech and an NBC News follow-up, which had a 5.2/8 and won the hour with a 2.1 demo rating. ABC's speech coverage and a "Modern Family" repeat were third, beating the 3.2/4 for FOX's speech coverage and the start of "So You Think You Can Dance." The CW's "90210" was fifth with a 1.5/2.
CBS stayed in front at 9 p.m. with the end of "NCIS" and "Two and a Half Men," which averaged an 8.7/13. NBC's "The Biggest Loser" was second with a 6.0/9 and averaged a 3.6 rating in the 18-49 demo to win the hour. FOX's "So You Think You Can Dance" was third. Fourth place went to ABC's "Scrubs," which premiered its ninth season with a 2.8/4 overall and a 2.0 in the demo. The CW's "Melrose Place" continued to lack that elusive Heather Locklear bounce, doing a 1.0/2 and a 0.7 in the demo.
NBC won weeknight 10 p.m. hour for the first time in many a week, getting a 6.5/11 from "The Biggest Loser," which also won the demo with a 3.9 rating. CBS' "Victoria's Secret Fashion Show" was second with a 5.2/9 overall and a 2.9 demo rating. ABC's "The Forgotten" trailed with a 3.6/6 and a dismal 1.2 demo rating.
All ratings information comes from preliminary Fast National Nielsen data, which includes live and same-day DVR viewing. All numbers are subject to change, particularly in the case of live events.
A long-time member of the TCA Board and a longer-time blogger of "American Idol," Dan Fienberg writes about TV, except for when he writes about movies or sometimes writes about the Red Sox. But never music. He would sound stupid talking about music.