NBC won the final Monday of the television season in key demos , sweeping each half-hour in young adults behind the performance finale of “The Voice” and the variety special “The Maya Rudolph Show.” ABC ran second with the performance finale of “Dancing With the Stars” and the return of summer series “The Bachelorette.”

According to preliminary national estimates from Nielsen, “The Voice” averaged a 3.1 rating/10 share in adults 18-49 and 11.5 million viewers overall from 8 to 10 p.m., up a tick week to week (and perhaps two tenths, as it appears likely to round up to a 3.2) and the night’s No. 1 program in 18-49 and 25-54 (4.0/11). The music contest hit a five-week high but came in down from the 3.5 it did on the final Monday of last season and the 3.7 it did with its year-ago Monday closer in mid-June (3.7).

NBC stayed on top in 18-49 at 10 p.m. with “The Maya Rudolph Show” (2.2/6 in 18-49, 7.2 million viewers overall), a special exec produced by “Saturday Night Live” honcho Lorne Michaels. Joining “SNL” alum Rudolph in the taped special were guests including Sean Hayes, Fred Armisen, Andy Samberg and R&B star Janelle Monae.

ABC’s “Dancing With the Stars” (2.5/8 in 18-49, 15.0 million viewers overall), trimmed to 90 minutes for its final performance show, was up two-tenths week to week to place a solid second in most categories while ruling as easily Monday’s most-watched program overall. It was just about at last year’s levels (2.6 in 18-49, 15.0 million). In a good sign for the future of the show, “Dancing” posted its highest-rated Monday final in both adults 18-34 (1.7/7) and women 18-34 (2.5/8) in five cycles (since the fall of 2011).

The 90-minute season premiere of “The Bachelorette” (1.9/5 in 18-49, 7.0 million viewers overall) was on par with last year’s opener (at 8 p.m.) in 18-49 and up 17% in total viewers (from 6.0 million).

At Fox, “Bones” (1.6/5 in 18-49, 5.9 million viewers overall) was down a tick from last week with its finale, and “24: Live Another Day” (1.7/5 in 18-49, 5.7 million viewers overall) declined about 15% in its third week.

CBS aired a mix or repeats and originals, starting with an encore “2 Broke Girls” (1.3/4 in 18-49, 4.9 million viewers overall) and an original “Friends With Better Lives” (1.6/5 in 18-49, 5.1 million viewers overall); despite being canceled by the network, “Friends” again built on its lead-in and slightly outperformed the recent season finales of ABC’s “The Goldbergs,” NBC’s “About a Boy” and Fox’s “Brooklyn Nine-Nine” — first-year comedies that were renewed for season 2.

The season finale of “Mike & Molly” aired at 9 (1.9/6 in 18-49, 7.0 million viewers overall), followed by repeats of “Mom” (1.4/4 in 18-49, 5.8 million viewers overall) and “Criminal Minds” on a special night (1.3/4 in 18-49, 5.9 million viewers overall).

CW aired the movie “District 9” to tiny numbers (0.2/1 in 18-49, 0.7 million viewers overall).

Preliminary 18-49 averages for the night: NBC, 2.8/8; ABC, 2.2/7; Fox, 1.6/5; CBS, 1.5/4; Univision, 1.1/3; Telemundo, 0.4/1; CW, 0.2/1.

In total viewers: ABC, 11.0 million; NBC, 10.1 million; CBS and Fox, 5.8 million; Univision, 2.6 million; Telemundo, 1.1 million; CW, 0.7 million.