Original episodes of ”Glee” and ”New Girl” helped Fox prevail among young adults on Tuesday, but CBS impressed by winning in its core demo with repeats of its regular lineup.

According to preliminary national estimates from Nielsen, ”Glee” opened the night for Fox on the low end of its range (2.9/8 in 18-49, 7.1 million viewers overall) but did win its hour in 18-49. Likewise ”New Girl” (3.4/9 in 18-49, 6.8 million viewers overall) and ”Raising Hope” (2.2/5 in 18-49) were down a bit vs. last week, though the former was the night’s No. 1 program in 18-49.

At CBS, a repeat of ”NCIS” (2.1/6 in 18-49, 12.7 million viewers overall) ran second for its 8 o’clock hour in 18-49 while winning in 25-54 and standing as the night’s most-watched program overall. The net similarly held tough with ”NCIS: Los Angeles” (2.1/5 in 18-49, 12.1 million viewers overall), a tick out of second in 18-49 and a winner in 25-54 and total viewers, as was ”Unforgettable” (1.6/4 in 18-49, 8.0 million viewers overall), which beat out an original episode of ABC’s crime drama ”Body of Proof” (1.5/4 in 18-49, 7.2 million viewers overall). Still, ”Body” built on its repeat comedy lead-in and did improve the hour vs. last year for the net.

ABC fared well kicking off the night with Tim Allen comedy ”Last Man Standing” (2.6/7 in 18-49, 8.7 million viewers overall), which may have picked up some ”NCIS” viewers with that show in repeat and grew 8% week to week in 18-49 and was the night’s most popular comedy overall. It was followed by ”Man Up” (1.6/4 in 18-49, 4.8 million viewers overall) and special repeats of Wednesday comedies ”The Middle” (1.1/3 in 18-49, 3.8 million viewers overall) and ”Suburgatory” (1.3/3 in 18-49, 4.0 million viewers overall).

NBC opened with the special ”A Michael Buble Christmas” (1.5/4 in 18-49, 7.2 million viewers overall), which skewed older than regular slot occupant ”The Biggest Loser” but delivered the net’s largest audience in Tuesday’s leadoff hour since July. ”Biggest Loser” followed from 9 to 11 p.m. (2.2/6 in 18-49, 6.7 million viewers overall), down from last week but moving to the demo lead in its second hour.

CW aired ”90210,” which continues to hold up pretty well (0.8/2 in 18-49, 1.5 million viewers overall), and a repeat of ”Ringer” (0.4/1 in 18-49, 0.8 million viewers overall).

Preliminary 18-49 averages for the night: Fox, 2.9/8; CBS and NBC, 2.0/5; ABC, 1.6/4; Univision, 1.5/4; CW, 0.6/2.

In total viewers: CBS, 10.9 million; NBC, 6.9 million; Fox, 6.4 million; ABC, 5.9 million; Univision, 3.5 million; CW, 1.2 million.