The Voice began its live shows Monday, but dropped to a season low.

The two-hour episode drew 11.9 million viewers and a 3.9 in the adults 18-to-49 demographic, down four-tenths from last week. Lead-out Revolution (6.3 million, 2.1) rose three-tenths.

On ABC, Dancing with the Stars (12.9 million, 1.9) dipped a tenth to a new series low, while Castle (10.8 million, 2.0) was flat.

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CBS' lineup was either flat or down, save for Hawaii Five-0 (7.8 million, 1.9), which rose two-tenths after hitting a series low. Fox's Rihanna concert special drew 1.7 million viewers and a 0.8.

8 p.m.
CBS: How I Met Your Mother 6.9 million viewers (2.6 demo rating); Rules of Engagement 6.6 million (2.1)ABC: Dancing with the Stars 12.9 million (1.9) [8-10 p.m.]Fox: Rihanna 777 1.7 million (0.8) NBC: The Voice 11.9 million (3.9) [8-10 p.m.]CW: Oh Sit! 900,000 (0.3) 9 p.m.
CBS: 2 Broke Girls 7.9 million (2.6); Mike & Molly 7.1 million (2.2)Fox: Bones (R) 2.4 million (0.6)CW: 90210 610,000 (0.3)10 p.m.
CBS: Hawaii Five-0 7.8 million (1.9)ABC: Castle 10.8 million (2.0)NBC: Revolution 6.3 million (2.1)