Fast National ratings for Thursday, Feb. 5, 2009.

Facing repeats on CBS and drawing extra viewers with the possibility of a "Grey's Anatomy"/"Private Practice" crossover, ABC won Thursday night comfortably.

Among adults 18-49, ABC did a 4.5 rating, topping the 3.3 rating for FOX in the key demographic. NBC was a distant third with a 2.9 rating, while CBS' 2.2 rating and the 1.5 rating for The CW trailed.

Overall, ABC averaged an estimated 11.82 million viewers and a 7.7 rating/12 share. CBS and FOX tied for second with a 5.6/9, though FOX had the advantage in total viewers. NBC was fourth with a 4.3/7, while The CW's 2.2/3 was good for third.

FOX started the night in first with a robust 6.7/11 for "Bones." ABC's "Ugly Betty" was a distant second with a 5.0/8. CBS' repeats of "Big Bang Theory" and "How I Met You Mother" topped the 3.5/6 averaged by "My Name Is Earl" and "Kath & Kim" on NBC. The CW's "Smallville" had a 2.4/4.

At 9 p.m. ABC moved into first with a 9.8/15 for "Grey's Anatomy." CBS' repeat of "CSI: Crime Scene Investigation" was second. NBC was third with "The Office" (5.2/8) and "30 Rock" (4.1/6), while "Hell's Kitchen"  will to a 4.5/7 in its second week. The CW's "Supernatural" had a 2.1/3.

Because of the crossover, "Private Practice" gave ABC an 8.4/14 in the 10 p.m. hour. CBS' "Eleventh Hour" was second with a 5.5/9. NBC's "E.R." trailed.

All ratings information comes from preliminary Fast National Nielsen data, which includes live and same-day DVR viewing. All numbers are subject to change.