Overnight TV Ratings -- "30 Rock" Fall

Despite facing repeats on CBS, NBC's "30 Rock" proved the weak link in the channel's attempt to revive Must-See TV on Thursday. "Scrubs" faced super-tough competition with "Grey's Anatomy" and the repeat "CSI," and certainly struggled. But "30 Rock" lost almost 2 million of "Scrub's" viewers. If NBC had any replacement comedies, they'd probably start planning to replace it. The full rundown per MediaWeek's Marc Berman:

8 p.m.
1. Survivor: Cook Islands (CBS) -- 15.54 million viewers
2. Ugly Betty (ABC) -- 13.33 million
3. My Name Is Earl (NBC) -- 10.03 million/The Office (NBC) -- 9.07 million
4. Til Death (FOX) -- 4.77 million/Til Death rerun (FOX) -- 4.78 million
5. Smallville rerun (CW) -- 3.13 million

9 p.m.
1. Grey's Anatomy (ABC) -- 24.27 million
2. CSI rerun (CBS) -- 15.88 million
3. Scrubs (NBC) -- 8.45 million/30 Rock (NBC) -- 6.56 million
4. The OC (FOX) -- 3.65 million
5. Supernatural (CW) -- 2.62 million

10 p.m.
1. ER (NBC) -- 13.86 million
2. Men In Trees (ABC) -- 11.85 million
3. Shark rerun (CBS) -- 10.36 million