CBS racked up another Thursday-night ratings win, but NBC's "30 Rock" grabbed its biggest audience ever following Tina Fey's star turn as Sarah Palin on " Saturday Night Live."

CBS led the night with a 9.0 rating/14 share, beating out ABC's 7.1/11. NBC came in third with a 4.9/8. FOX took fourth with a 2.5/4, edging The CW's 2.4/4 (the two finished virtually tied in total viewers.

The adults 18-49 race was closer, but CBS' 3.9 rating still won the night, topping ABC's 3.6 and NBC's 3.4. FOX and The CW tied for fourth at 1.6.

" Survivor: Gabon," 7.9/13, put CBS on top at 8 p.m. ABC's "Ugly Betty" drew a 5.6/9 to finish second. "My Name Is Earl," 3.9/6, and " Kath & Kim," 3.4/5, were third for NBC. "Smallville" earned a 2.6/4 for The CW, edging a " Kitchen Nightmares" rerun on FOX.

CBS stayed on top at 9 p.m. with " CSI," the night's most-watched show at 11.5/17. " Grey's Anatomy," 9.9/15, however, grabbed the evening's best adults 18-49 rating. " The Office," 5.3/8, and "30 Rock," 5.0/7, which hit series highs in viewers and adults 18-49, kept NBC in third. A new "Kitchen Nightmares," 2.5/4, moved FOX slightly ahead of " Supernatural" on The CW.

" Eleventh Hour," 7.7/13, completed the CBS sweep at 10 p.m. NBC's " ER," 5.9/10, which led the hour in the 18-49 demo, beat out ABC's " Life on Mars," 5.7/10.