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NBC topped the first Monday of 2013, thanks to The Biggest Loser and some help from new drama Deception.

Loser averaged 6.3 million viewers and a 2.4 in the 18-to-49 demographic, down 17 percent from Sunday's premiere. Deception followed with a so-so 5.6 million viewers and a 2.0. That's well off Revolution's performance in the timeslot, but the latter had The Voice as a lead-in. Deception did edge out Castle (8.5 million, 1.9) in the demo.

Winter TV Preview: Must-see new shows

ABC's season premiere of The Bachelor (6.8 million, 2.3) was down a tenth from last season's opener.On Fox, The Mob Doctor

's final episode drew 3.3 million viewers and 0.9.8 p.m.
CBS: How I Met Your Mother (R) 5.1 million viewers (1.6); 2 Broke Girls (R) 5.1 million (1.5)ABC: The Bachelor 6.8 million (2.3) [8-10 p.m.]Fox: Bones (R) 4.2 million (0.9) NBC: The Biggest Loser 6.3 million (2.4) [8-10 p.m.]CW: Hart of Dixie (R) 1 million (0.4) 9 p.m.
CBS: 2 Broke Girls (R) 6.1 million (1.8); Mike & Molly (R) 5.8 million (1.6)Fox: The Mob Doctor 3.3 million (0.9)CW: Beauty and the Beast (R) 860,000 (0.3)10 p.m.
Hawaii Five-0 (R) 4.9 million (1.1)ABC: Castle 8.5 million (1.9)NBC: Deception 5.6 million (2.0)