CBS rolled to victory on the first Monday of December behind its comedy block , the evening’s four top-rated programs among young adults , as well as a winning performance from ”Hawaii Five-0,” which continues to have a strong second season.

According to Nielsen preliminaries, ”Two and a Half Men” was the top-rated series Monday (5.0 rating/12 share in adults 18-49, 15.0 million viewers overall) and has now been the night’s top demo draw (excluding ”Monday Night Football”) in all 11 of its original episodes this fall. Also of note for the net was another strong start to the night for ”How I Met Your Mother” (4.5/12 in 18-49, 11.7 million viewers overall), which drew its largest overall audience in nearly three years, and ”2 Broke Girls” at 8:30 (4.6/11 in 18-49, 12.8 million viewers overall) and ”Mike and Molly” at 9:30 (4.2/10 in 18-49, 12.7 million viewers overall) also continue to shine. And capping the night, ”Hawaii Five-0” (3.0/8 in 18-49, 10.8 million viewers overall) easily led the broadcast pack with a demo score that’s about as high as they come these days for a 10 p.m. show.

Elsewhere, Fox’s airing of the ”American Country Awards” (2.0/5 in 18-49, 7.4 million viewers overall) was up 33% over last year’s low-rated first installment of the kudocast. It lifted the net to a second-place 18-49 finish among the broadcasters.

ABC started well with holiday specials ”A Charlie Brown Christmas” (2.8/8 in 18-49, 9.1 million viewers overall) and ”Prep and Landing 2” (2.2/6 in 18-49, 7.0 million viewers overall) but then fell sharply with feel-good gameshow ”You Deserve It” (1.0/2 in 18-49, 3.6 million viewers overall). And with a weak lead-in, an original episode of ”Castle” hit a season low (2.0/5 in 18-49, 8.0 million viewers overall), though it was up a tick vs. the comparable night a year ago.

NBC finished fifth among the broadcasters (behind Univision) with a two-hour holiday edition of ”The Sing Off” (1.1/3 in 18-49, 4.1 million viewers overall), which was down noticeably from last week’s regular episode. And remaining low at 10 p.m. was newsmag ”Rock Center” (0.9/2 in 18-49, 3.4 million viewers overall).

At CW, first-year drama ”Hart of Dixie” (0.8/2 in 18-49, 1.8 million viewers overall) again built on its ”Gossip Girl” lead-in (0.6/1 in 18-49, 1.3 million viewers overall), including adults 18-34 (0.9 vs. 0.7).

Preliminary 18-49 averages for the night: CBS, 4.0/10; Fox, 2.0/5; ABC, 1.8/5; Univision, 1.5/4; NBC, 1.0/3; CW, 0.7/2.

In total viewers: CBS, 12.3 million; Fox, 7.4 million; ABC, 6.5 million; NBC, 3.9 million; Univision, 3.6 million; CW, 1.5 million.