The two-part season finale of Fox’s ” New Girl,” featuring the unconventional wedding of Schmidt and Cece, produced a ratings uptick for the comedy on Tuesday but also highlighted the wide ratings gap between it and the rookie half-hours — “Grandfathered” and “The Grinder” — airing alongside it.

CBS and NBC, meanwhile, tied for the night’s lead among young adults, with the Eye’s “NCIS” standing as the top program in most broad categories and the Peacock’s “Chicago Fire” the clear demo leader in the 10 o’clock hour.

According to preliminary national estimates from Nielsen, Fox’s “New Girl” led off the night with a 1.1 rating/4 share in adults 18-49 and 2.4 million viewers overall. It was up a tenth from last week and moved ahead of ABC’s “Fresh Off the Boat” (series-low 0.9/4 in 18-49, 3.9 million viewers overall) as Tuesday’s top comedy in 18-49.

The season finale of “Grandfathered” followed at 8:30 p.m. with a 0.6/2 in 18-49 and 1.6 million viewers overall, down a tick from last week. A second “New Girl” rallied from there (1.0/3 in 18-49, 2.2 million viewers overall), up a tenth from its 9 p.m. episode last week, and “The Grinder” capped its season with a 0.6/2 in 18-49 and 1.6 million total viewers, up a tenth from last week’s low.

“Grandfathered” and “The Grinder” have been considered long shots to return next season for Fox, though there’s some thought that the net may opt to pick one to bring back. The James Stamos-fronted “Grandfathered” (a co-production of Twentieth and ABC Studios) has generally been a little higher-rated of the two, but the Rob Lowe-led “Grinder” (solely produced by Twentieth) has generated better reviews. Fox was expected to make a decision on the fate of both comedies in the coming days.

At CBS on Tuesday, the penultimate episode of “NCIS” (2.0/8 in 18-49, 15.7 million viewers overall) earned honors as the night’s No. 1 program in 18-49, 25-54 (3.1/10) and total viewers, up a little across the board from last week. Next week will mark not only the show’s season finale, but the final episode for original cast member Michael Weatherly.

“NCIS: New Orleans” (1.6/6 in 18-49, 13.0 million viewers overall) lost a little steam from its especially strong showing of last week but tied for the 18-49 lead at 9 p.m. while winning outright in 25-54 (2.5/7) and total viewers. And at 10 p.m., “Person of Interest” (1.1/4 in 18-49, 7.4 million viewers overall) was down a tenth from last week’s season premiere but up by the same amount from Monday’s original.

NBC opened with a two-tenth uptick from last week’s low for “The Voice” results show at 8 (1.8/7 in 18-49, 8.9 million viewers overall), and “Chicago Med” (1.6/6 in 18-49, 8.0 million viewers overall) picked up a tenth of its own as it pulled into an 18-49 tie with “NCIS: New Orleans” after falling 0.3 below it last week. And at 10 p.m., “Chicago Fire” (1.6/6 in 18-9, 7.9 million viewers overall) held steady, winning by a 45% margin in 18-49 over CBS’ “Person of Interest” (1.6 vs. 1.1).

ABC opened with the second straight two-tenth decline for “Fresh Off the Boat” (0.9/4 in 18-49, 3.9 million viewers overall), but “The Real O’Neals” (0.9/3 in 18-49, 3.2 million viewers overall) was able to match last week’s delivery. “Marvel’s Agents of SHIELD” (0.9/3 in 18-49, 2.9 million viewers overall) was unable to ride any heat achieved by Marvel’s big theatrical success last weekend with “Captain America: Civil War,” as the third-year show held at last week’s number, which matched its series low. And at 10 p.m., a special preview of returning summer reality series “Battlebots” (0.6/2 in 18-49, 2.0 million viewers overall) could only match last week’s “Beyond the Tank” score.

And at CW, both “The Flash” (1.3/5 in 18-49, 3.5 million viewers overall) and “Containment” (0.5/2 in 18-49, 1.4 million viewers overall) held steady. “Flash” tied with “The Voice” for the 8 o’clock hour’s lead in 18-34 (1.1/5) while winning outright among the broadcasters in men 18-34 (1.4/5).