A two-hour “Dancing With the Stars” lifted ABC to victory on the second Monday of the new season, while rookie shows “Chuck” and “Journeyman” on NBC and “Big Bang Theory” on CBS all held up pretty well in their second tries. Not looking so hot was new CW comedy “Aliens in America.”

According to preliminary nationals from Nielsen, “Dancing With the Stars” averaged a 5.2 rating/13 share in adults 18-49 and 20.3 million viewers overall from 8 to 10 p.m., winning its time period in both categories despite the expected declines from its impressive season premiere of a week earlier. “The Bachelor” closed out the night for ABC with competitive numbers (3.6/9 in 18-49, 9.6 million viewers overall).

Elsewhere, the night’s opening hour was a competitive three-net battle among young adults between the CBS comedy block of “How I Met Your Mother” (3.0/9 in 18-49, 7.9 million viewers overall) and “Big Bang Theory” (3.4/8 in 18-49, 8.6 million viewers overall), NBC’s “Chuck” (3.1/8 in 18-49, 8.2 million viewers overall) and Fox’s “Prison Break” (3.0/8 in 18-49, 7.2 million viewers overall). “Bang” built on its “Mother” lead-in by a similar margin as premiere week (even though both shows were down about 10%), while “Chuck” dropped off by about 14%.

At 9, NBC’s “Heroes” (5.5/13 in 18-49, 11.9 million viewers overall) was neck and neck with ABC’s “Dancing” for the 18-49 lead, down from last week’s premiere but on par with its second seg of a year ago. CBS was solid with “Two and a Half Men” (4.6/11 in 18-49, 13.4 million viewers overall) and “Rules of Engagement” (3.9/9 in 18-49, 10.5 million viewers overall), although “Rules” didn’t hold as much of its lead-in with the potent “Dancing” extending into its timeslot this week. Fox’s “K-ville” (2.0/5 in 18-49, 5.5 million viewers overall) dropped a bit more in its third week.

The 10 o’clock drama battle went to CBS’ “CSI: Miami” (4.6/12 in 18-49, 14.9 million viewers overall) over NBC’s “Journeyman” (3.3/8 in 18-49, 8.4 million viewers overall), but the latter rookie held up well, down just slightly despite a larger dropoff for its lead-in.

CW didn’t do much with its opening-hour comedy combo of “Everybody Hates Chris” (1.0/3 in 18-49, 2.6 million viewers overall) and “Aliens in America” (0.8/3 in 18-49, 2.3 million viewers overall) but did pick up at 9 with vet “Girlfriends” (1.2/3 in 18-49, 2.6 million viewers overall) and the second-year laffer “The Game” (1.4/3 in 18-49, 8.0 million viewers overall). “Game” achieved series highs in multiple categories, including adults 18-34 (1.8/4).

Preliminary 18-49 averages for the night: ABC, 4.7/12; CBS and NBC, 4.0/10; Fox, 1.7/4; Univision, 1.4/4; CW, 1.0/2.

In total viewers: ABC, 16.8 million; CBS, 11.7 million; NBC, 9.5 million; Fox, 5.1 million; Univision, 3.5 million; CW, 2.5 million.