NBC has won the first post-Olympics Tuesday in key demos behind “The Voice,” which is looking a bit softer this cycle, and good timeslot premieres for comedies “About a Boy” and “Growing Up Fisher.” Audiences, though, weren’t interested in playing ABC’s “Mind Games,” and didn’t seem all that excited for the return of Fox’s “Glee.”

CBS ran a close second to NBC in adults 25-54 and dominated the night as usual in total viewers with original dramas of its crime dramas, though they were at season lows across the board.

According to preliminary national estimates from Nielsen, the first Tuesday episode of the new season of “The Voice” averaged a 3.7 rating/11 share in adults 18-49 and 13.0 million viewers overall in the 8 o’clock hour — down from the 4.1 demo score from the comparable night a year ago (when it premiered a month later) but easily the night’s top program in 18-49 and 25-54 (4.9/13). The 21% dropoff from Monday to Tuesday for “The Voice” (4.7 to 3.7) was its largest for any season to date.

The music competition was followed by the Tuesday premieres of comedies “About a Boy” (2.4/7 in 18-49, 8.3 million viewers overall) and “Growing Up Fisher” (2.0/5 in 18-49, 7.0 million viewers overall), which were airing repeats of their special preview episodes over the weekend following NBC’s coverage of the Winter Olympics; “Boy” did a 2.2 for its Saturday preview, and “Fisher” earned a 2.0 on Sunday. As a block Tuesday, they finished tied for second in adults 18-49, with each half-hour easily beating the Fox comedy in its timeslot (“About a Boy,” pictured, won by 2.4 to 1.4 over “New Girl” and “Fisher” bested “Brooklyn Nine-Nine” 2.0 to 1.3).

It’s tough to draw apples-to-apples comparisons to previous NBC comedy rollouts, but from a retention standpoint “About a Boy” and “Growing Up Fisher” looked pretty good — especially considering these were episodes that had previously aired. In September 2012 (opposite repeats on rival nets), the combo of “Go On” and “The New Normal” averaged a 2.9 demo rating for their premieres (retaining 72% of “The Voice’s” 4.0); and by March of last year, the shows averaged 1.6 on the spring season’s premiere of “The Voice” (which did a 4.1).

Closing the night for NBC, “Chicago Fire” (1.8/5 in 18-49, 7.1 million viewers overall) returned to match the demo score of its prior original. It edged past CBS’ “Person of Interest” (1.7/5 in 18-49, 10.8 million viewers overall), though the Eye drama prevailed in 25-54 and total viewers.

Elsewhere, ABC was above average for a Tuesday thanks to a special two-hour episode of Monday reality series “The Bachelor” (2.4/7 in 18-49, 8.1 million viewers overall), winning the 9 o’clock hour in 18-49. Despite that good lead-in, though, Christian Slater-Steve Zahn drama “Mind Games” settled for a 1.1/3 in 18-49 and 3.6 million viewers overall to finish well behind the competing dramas on CBS and NBC; previous timeslot occupant “Killer Women” opened to a 0.9 in early January (but that was following a 1.1 lead-in from “Trophy Wife”). And next week, when the 9:30 p.m. comedy returns to the ABC lineup, “Mind Games” figures to get a lead-in that’s roughly one-third of the 2.6 it got last night.

At CBS, “NCIS” (2.6/8 in 18-49, 16.9 million viewers overall) and “NCIS: Los Angeles” (2.2/6 in 18-49, 13.1 million viewers overall), back in originals for the first time in three weeks, hit season lows; the former was second for its hour to “The Voice” in demos while the latter placed second to “The Bachelor” in 18-49 while running first in 25-54 (3.2/8). At 10, the “Person of Interest” scores also represented its low-water mark of the season.

Fox tried to energize its Tuesday by returning “Glee” to its former timeslot, but it generated merely a fourth-place 1.2/3 in 18-49 and 2.9 million viewers overall in the 8 o’clock hour opposite “The Voice”; while low, it wasn’t quite the series-low 1.1 it pulled on a Thursday in early December opposite NBC’s big “The Sound of Music.” From there, “New Girl” (1.4/4 in 18-49, 2.8 million viewers overall) built a bit from “Glee,” and “Brooklyn Nine-Nine” (1.3/3 in 18-49, 2.6 million viewers overall) held most of that audience — both up a tick from their prior originals of two weeks ago opposite the Olympics.

CW held up pretty well with “The Originals” (0.8/2 in 18-49, 1.9 million viewers overall) and “Supernatural” (1.1/3 in 18-49, 2.4 million viewers overall), with the former down slightly and the latter up a smidge from their most recent originals. (The net’s numbers are subject to revision, though, since the prelims include Bulls basketball in Chicago).

In metered-market latenight results, NBC’s “Tonight Show Starring Jimmy Fallon” (4.0 household rating/10 share) matched the combined deliveries of CBS’ “Late Show With David Letterman” (2.3/6) and ABC’s “Jimmy Kimmel Live” (1.7/4). The Peacock program was more dominant in adults 18-49, with its 1.7 rating comfortably ahead the combined totals of “Kimmel” (0.6) and “Late Show” (0.5) in Nielsen’s 25 markets with Local People Meters.

At 12:35 a.m., the second night of “Late Night With Seth Meyers” (2.2/8 in metered-market households) easily beat CBS’ “Late Late Show With Craig Ferguson” (1.1/4) as well as the half-hour “Nightline” on ABC (1.0/3). In the markets where 18-49 demo was gathered, “Late Night” did a 1.0, while both “Late Late Show” and “Nightline” did a 0.3.

Preliminary 18-49 averages for the night: NBC, 2.6/7; CBS, 2.2/6; ABC, 2.0/6; Fox, 1.2/3; Univision, 1.1/3; CW, 0.9/3; Telemundo, 0.6/2.

In total viewers: CBS, 13.6 million; NBC, 9.2 million; ABC, 6.6 million; Univision, 2.9 million; Fox, 2.8 million; CW, 2.2 million; Telemundo, 1.3 million.