Thursday's ratings rundown:
* 8 pm/ET
Survivor topped the hour with an audience of 12 million total viewers, on par with last week. Bones' surreal season-ender scored 8.7 mil, up a tick. Ugly Betty dropped 9 percent to claim third with 6.83 mil.
While NBC's Earl (4.8 mil) wrapped up its season with a 370K gain, Parks & Recreation (4.25 mil) concluded its freshman run with another (8 percent) drop. Smallville saw 3.16 mil (down 180 thou) pull up a chair for the [cough] "epic" clash.
* 9 pm
Grey's Anatomy's two-hour, two-jaw-dropper season finale drew 16.35 million viewers - marking the serial's largest audience since the Sept. 25 opener and a week-to-week gain of a mil. CSI's finale followed with 14.42 mil.
Supernatural's Dean and Sam had 2.9 mil (up 100K) at their side as they braved an apocalyptic finale.
* 10 pm
Placing second behind Grey's, CSI: NY's wacky little Thursday season-ender copped 12.84 mil, up 600 thou from its Wednesday outing. Facing outrageously stiff competition, NBC's Southland plummeted 29 percent, to 4.64 mil.