Lynette Rice
October 26, 2010 AT 04:43 PM EDT

Image Credit: Sonja Flemming/CBS; Adam Larkey/ABC; Adam Rose/FoxABC and the behemoth Dancing With the Stars had another great night Monday. That (arguably silly) rock theme did wonders for the two-hour competition show that had a slight overrun into Castle’s timeslot: Stars averaged 20 million viewers and posted a stunning 4.2 rating/11 share among adults 18-49 — a 5% increase versus last week. That, in turn, boosted Castle, which earned a 3.0/8 in the demo (up 20% versus last week) and lured a timeslot-winning audience of 11.7 million.

Overall, ABC won the night in viewers (17.3 million) and adults 18-49 (3.8/10). Each 18-49 ratings point represents 1.3 million ballroom-loving people.

CBS’ comedy night came in second with a 3.3/9 and 10.2 million viewers, though How I Met Your Mother (3.2/9, 8.3 million) and Two and a Half Men (4.3/11, 13.6 million) were down single-digits versus last week. Rules of Engagement (2.9/8, 8.2 million) was flat versus last week while Mike & Molly (3.6/9, 10.8 million) was actually up 3% versus last week. Good for the house of Chuck Lorre (the über-producer who’s behind the comedy about two pleasantly plump lovers). But Hawaii Five-0 (2.8/7, 10 million) posted its lowest-rated telecast so far in the key demo, though it still won its timeslot among men 25-54 and men 12-17 (the dudes dig Scott Caan!).

Chuck on NBC earned a 1.9/5 and averaged 5.4 million, while The Event — which has already earned a full season pickup — posted a 2.0/5, it’s lowest-rated telecast to date. It lured 5.9 million. And Chase, which also was picked up for a full season, was down a whopping 13% to a mere 1.3/4 in the demo, also its lowest-rated telecast ever. It averaged 4.9 million. Overall, NBC finished third for the night among 18-49 (1.7/4) and total viewers (5.4 million).

Fox ran a repeat of House which did no favors for an original episode of Lie to Me, which did a 1.5/4 and attracted 4.3 million viewers. Fox came in fourth for the night with 4.1 million and a 1.5/4.

On the CW, 90210 attracted its largest audience of the season (2.0 million) and matched its season-highs in all key demographics, including women 18-34. Gossip Girl only averaged 1.8 million, but it was still the CW’s best Monday of the season in total viewers (2.0 million).

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