Michael Emerson Michael Emerson

CBS drama Person of Interest hit an all-time high in the ratings on Thursday night.

The freshman series garnered 15.8 million viewers with a 3.4 rating in the adults 18-to-49 demographic, aided by the lead-in of a Big Bang Theory repeat, which easily outperformed the last new episode of Rob! 

Fox, again, won the 8 o'clock hour in the demo with the American Idol results show raking in 17 million viewers and a 4.8 rating. The competition series edged out Big Bang Theory, a repeat Wipeout and new episodes of 30 Rock and Parks and Recreation.

NBC's new series Awake, meanwhile, fell 20 percent in its second week against a fresh episode of The Mentalist (13.8 million viewers, 2.8 rating).

8 p.m.
CBS: The Big Bang Theory 15.2 million viewers (5.2 demo rating); The Big Bang Theory (R) 12.9 million (4.0)
ABC: Wipeout (R) 4.5 million (1.3)
Fox: American Idol 17 million (4.8)
NBC: 30 Rock 3.5 million (1.4); Parks & Recreation 3.77 million (1.9)
CW: The Vampire Diaries (R) 1.2 million (0.4)

9 p.m.
Person of Interest 15.8 million (3.4)
ABC: Grey's Anatomy (R) 4.1 million (1.5)
NBC: The Office 5 million (2.6); Up All Night 3.5 million (1.7)
CW: Supernatural (R) .9 million (0.3)

10 p.m.
The Mentalist 13.8 million (2.8)
ABC: GCB (R) 3.8 million (1.3)
NBC: Awake 4.3 million (1.6)