Fast National ratings for Monday, February 1, 2010.

Led by its 9 p.m. comedies, CBS was able to hold off FOX and ABC for overall and key demographic wins on Monday night.

Among adults 18-49, CBS averaged a 4.1 rating, topping FOX's 3.9 rating and the 3.5 rating for ABC in the all-important demographic. NBC was a distant fourth with a 1.9 rating, with The CW's 1.0 rating trailing.

Overall, CBS averaged an estimated 12.74 million viewers to go with a 7.8 rating/12 share. FOX was second with a 6.8/10 and 11.55 million viewers on average, beating the 6.7/10 for ABC. NBC was fourth with a 3.0/5, still holding off the 1.4/2 for The CW.

FOX started the night in first with a 7.8/12 for "House," which also won its hour in the key demo with a 4.8 rating. ABC's "The Bachelor" was second with a 7.1/11. CBS' "How I Met Your Mother" (5.8/9) and "Accidentally on Purpose" (5.3/8) took third. On NBC, "Chuck" had a 3.9/6, averaging more than 6.7 million viewers and a 2.4 demo rating. The CW's "One Tree Hill" was fifth.

CBS moved into first at 9 p.m. with a 9.5/14 for "Two and a Half Men" and "The Big Bang Theory," which also averaged a 5.2 demo rating. ABC's "The Bachelor" improved to a 7.8/12 in its second hour. FOX's "24" fell to a 5.8/9. On NBC, "Heroes" did a 2.7/4 for fourth. The third week of The CW's "Life Unexpected" had a 1.3/2 for fifth.

In the 10 p.m. hour, CBS' "CSI: Miami" did an 8.5/14, averaging a 3.6 rating in the demo. ABC's "Castle" repeat was a solid second. On NBC, "The Jay Leno Show" did a particularly woeful 2.5/4 and a 1.1 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.

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.