Laurence Fishburne and Marg Helgenberger, <I>CSI</i> Laurence Fishburne and Marg Helgenberger, CSI

This Thursday, as repeats ran amok:

8 pm/ET
A special Thursday blast of American Idol was special indeed, topping the night with 24.27 million total viewers. Coming in fourth — and besting an Ugly Betty repeat — was Smallville, which at 4.18 mil was up 10 percent week-to-week.  

9 pm
With Grey's Anatomy on bed rest, CSI bounced back from last week's grim Grissom-less debut to deliver 20.08 million viewers (up 15 percent). Hell's Kitchen placed second with 11.08 mil. Supernatural's "After School Special" got excellent grades, scoring the series' second-best audience of the season — 3.58 mil (up 18 percent).

10 pm
Eleventh Hour won the hour with 12.7 million viewers, up 400K. Handicapped by the Grey's repeat/weak lead-in, Private Practice (7.67 mil) plunged 20 percent.