Jane Krakowski and Tina Fey

The Big Bang Theory claimed another victory Thursday, while 30 Rock kicked off its final season on a low note.

Leading off NBC's night, 30 Rock nabbed 3.4 million viewers and a 1.3 in the adults 18-to-49 demographic, off of what Community's season premiere (3.9 million, 1.7) delivered in the slot last year. Up All Night (3.1 million, 1.4) and The Office (4.1 million, 2.1) held steady, while Parks and Recreation (3.5 million, 1.9) jumped 19 percent.

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Big Bang (15.4 million, 4.9) dipped a tenth on CBS, but both Two and a Half Men (12.7 million, 3.5) and Person of Interest (14.6 million, 3.1) rose from last week. Elementary (11.2 million, 2.6), whose series premiere built on Person of Interest last week, this time dropped 16 percent.

ABC's Last Resort (7.9 million, 1.8) took a big dive as well, falling 18 percent from last week. Grey's Anatomy (10.6 million, 3.7) dropped seven tenths, while Scandal (6.8 million, 2.1) was flat.

On Fox, The X Factor (9.1 million, 3.1) was down a tad and Glee (6.2 million, 2.6) saw an 8 percent boost for its Kleenex-reaching break-up episode.

8 p.m.
CBS:
The Big Bang Theory 15.4 million (4.9); Two and a Half Men 12.7 million (3.5)
ABC: Last Resort 7.9 million (1.8)
Fox: The X Factor 9.1 million (3.1)
NBC: 30 Rock 3.4 million (1.3); Up All Night 3.1 million (1.4)
CW: The Next 0.9 million (0.3) [8-10 p.m.]

9 p.m.
CBS:
Person of Interest 14.6 million (3.1)
ABC: Grey's Anatomy 10.6 million (3.7)
Fox: Glee 6.2 million (2.6)
NBC: The Office 4.1 million (2.1); Parks and Recreation 3.5 million (1.9)

10 p.m.
CBS:
Elementary 11.2 million (2.6)
ABC: Scandal 6.8 million (2.1)
NBC: Rock Center with Brian Williams 3.4 million (1.1)