“Dancing With the Stars” and series-high scores for sophomore drama “Castle” carried ABC to a rather easy primetime ratings victory Monday, a night when the top scripted programs on competing networks aired in repeats.

Based on preliminary national estimates from Nielsen, “Dancing With the Stars” averaged roughly a 5.6 rating/15 share in adults 18-49 and 22.8 million viewers overall from 8 to 10:02 p.m., standing as the evening’s top program in both categories. Though down about 13% week to week, “Dancing” appears to have matched its largest-ever overall audience for an episode that wasn’t either a premiere or finale, outdrawing the combined CBS-NBC-Fox delivery from 8 to 10.

And following “Dancing” at 10:02 p.m., the conclusion of a two-part “Castle” averaged roughly a 3.6/10 in 18-49 and 14 million viewers overall — establishing series-best ratings for a second straight week. It easily beat crime drama competition “CSI: Miami” on CBS, which aired a repeat (2.3/6 in 18-49, 8.1 million viewers overall).

CBS finished second on the night even though top shows “Two and a Half Men” (3.7/10 in 18-49, 10.8 million viewers overall) and “The Big Bang Theory” (3.5/9 in 18-49, 9.8 million viewers overall) aired repeats. In the night’s opening hour, repeat “How I Met Your Mother” (2.2/7 in 18-49, 5.7 million viewers overall) and original “Rules of Engagement” (2.9/8 in 18-49, 7.3 million viewers overall) were runners-up to “Dancing With the Stars” in most categories.

Fox aired another repeat of “House” (1.9/5 in 18-49, 5.5 million viewers overall), followed by always-in-original “24” (2.6/7 in 18-49, 8.3 million viewers overall), which edged down a tick week to week and placed third in the 9 o’clock hour.

At NBC, “Chuck” (2.1/6 in 18-49, 5.2 million viewers overall) took advantage of repeats on CBS and Fox to hit a three-week high, helping rookie 9 o’clock drama “Trauma” edge up a tick (1.5/4 in 18-49, 5.4 million viewers overall), though it remained deep in fourth place among the English-language broadcasters. And “Law & Order” again didn’t do much at 10 (1.8/5 in 18-49, 5.5 million viewers overall).

CW’s “Life Unexpected” (0.9/3 in 18-49, 2.1 million viewers overall) and “Gossip Girl” (0.9/2 in 18-49, 1.6 million viewers overall) continue to post modest numbers, with “Life” up a bit and “Gossip” down week to week.

Preliminary 18-49 averages for the night: ABC, 4.9/14; CBS, 2.8/8; Fox, 2.2/6; NBC, 1.8/5; CW, 0.9/2.

In total viewers: ABC, 19.9 million; CBS, 8.3 million; Fox, 6.5 million; NBC, 5.5 million; CW, 1.8 million.