Thursday's ratings recap:
Survivor: Gabon dropped nearly a million total viewers week-to-week, topping the hour with 12.18 mil. Ugly Betty placed second with 8.95 mil, up 400 thou. In third, both NBC's Earl (6.62 mil, +450K) and Kath & Kim (5.57 mil, +110K) saw increases.
Smallville hit a season high of 4.5 mil, its biggest audience since Nov. 15, 2007.
Grey's Anatomy dominated the demos, but at 15.63 million viewers (up 580K) again fell shy of unseating CSI (18.1 mil, down 540 thou) as the hour's most-watched program. With NBC's The Office dropping 10 percent to match its season low (8.35 mil), 30 Rock (eight mil) in turn dipped 530K from its week-ago series high.
With the Denver affiliates factored out, Supernatural actually dipped 330K, to 3.2 mil.
Eleventh Hour continued its run at No. 1 with 10.97 million viewers, sliding 500K. Life on Mars stole second with 8.9 mil (up 520 thou), to ER's 8.64 mil.