A new episode of “Glee” with returning guest star Gwyneth Paltrow boosted Fox to a comfortable primetime victory Tuesday among adults 18-49.

On the strength of its “NCIS” franchise, CBS finished first in overall viewers despite airing a night of reruns.

According to preliminary nationals from Nielsen, “Glee” (4.6 rating/14 share in 18-49, 12.0 million viewers overall) bumped up slightly from its last original episode Feb. 22 and posted its highest overall audience since its second episode of the 2010-11 season.

There was a considerable dropoff as the night progressed for Fox into comedies “Raising Hope” (2.8/8, 6.8 million) and “Traffic Light” (1.5/4, 3.8 million). Those looking for a silver lining for “Light” could point to the fact that in the demo, it outdrew all three network shows airing at 10 p.m.

CBS’ overall audience for its doubleheader of procedurals “NCIS” (2.3/7, 13.4 million) and “NCIS: Los Angeles” (2.6/7, 13.4 million) was nothing if not consistent, but more than a third of that contingent tuned out when it came time for “The Good Wife” (1.3/4, 8.3 million). “Wife” nonetheless won its 10 p.m. timeslot over NBC’s “Parenthood” (1.2/4, 3.2 million) and ABC’s “Detroit 1-8-7” (1.1/3, 5.1 million).

NBC had the No. 2 program of the night in 18-49 with two-hour “The Biggest Loser” (2.9/8, 8.1 million), which enjoyed a 15% week-to-week increase and had a peak in its final halfhour of 3.4/10.

ABC struggled in the early going with “No Ordinary Family” (1.0/3, 4.0 million) before improving with an original episode of “V” (1.7/5, 4.9 million) that still finished fourth at 9 p.m.

The CW sat in fifth among the English-language broadcasters with “One Tree Hill” (0.4/1, 1.0 million) and “Hellcats” (0.5/1, 1.2 million).

Preliminary 18-49 averages for the night: Fox 3.4/10, NBC 2.3/7, CBS 2.1/6, Univision 1.5/4, ABC 1.3/4, CW 0.4/1.

In total viewers: CBS 11.7 million, Fox 8.6 million, NBC 6.5 million, ABC 4.7 million, Univision 4.0 million, CW 1.1 million.