The first Tuesday of the February sweep brought out original programming on all the broadcast networks, with CBS rolling behind “NCIS” and an above-average “NCIS: New Orleans,” and CW again finishing ahead of ABC thanks to season highs for “The Flash.”

According to preliminary national estimates from Nielsen, “The Flash” (1.6 rating/5 share in adults 18-49, 4.0 million viewers overall) surged to its top 18-49 rating since its first crossover episode with “Arrow” in December 2014, placing second for its hour in the demo as well as total viewers. It also swelled by 25% in adults 18-34 (to 1.5), racking up the show’s highest rating since its series premiere. In both adults 18-34 and men 18-34, the Scarlett Speedster delivered the top broadcast rating of the night. (Note that CW did have some small-market pre-emptions for college basketball, though the network didn’t expect any real changes in the finals.)

“iZombie” followed for the CW (0.6/2 in 18-49, 1.5 million viewers overall), matching its highest demo rating since the show’s season premiere last fall.

At CBS, “NCIS” (2.4/8 in 18-49, 16.8 million viewers overall) was Tuesday’s No. 1 program in 18-49, 25-54 and total viewers, in line with its most recent original of three weeks ago. “NCIS: New Orleans” (1.9/6 in 18-49, 12.7 million viewers overall) was on the high end of its season range, matching its top non-crossover demo score of the season. Capping the night, “Limitless” (1.3/4 in 18-49, 6.4 million viewers overall) placed second among the broadcast dramas, up a tick from the low it set with its prior episode three weeks ago.

NBC held steady with its lineup of “Hollywood Game Night” (1.1/4 in 18-49, 3.8 million viewers overall), “Chicago Med” (1.6/5 in 18-49, 7.0 million viewers overall) and “Chicago Fire” (1.8/6 in 18-49, 8.1 million viewers overall). “Med” placed second at 9 p.m. to “NCIS: New Orleans,” while “Fire” again beat its rivals at 10.

Fox’s “New Girl” (1.4/5 in 18-49, 3.2 million viewers overall) matched its season high and may have benefited from ABC’s decision not to open the night with comedy. It was followed by typical scores for “Grandfathered” (0.9/3 in 18-49, 2.6 million viewers overall) and “Brooklyn Nine-Nine” (1.0/3 in 18-49, 2.3 million viewers overall) and an uptick for “The Grinder” (0.8/2 in 18-49, 2.0 million viewers overall), which had hit a low one week earlier.

Tuesday continues to be a major struggle for ABC, which placed fifth among the English-language broadcasters on the night. Numbers for the network’s programs on are subject to revision in the nationals due to a five-minute news special at the top of the night on the New Hampshire primaries, but in the prelims “Fresh Off the Boat” (1.2/4 in 18-49, 4.5 million viewers overall) and “The Muppets” (0.9/3 in 18-49, 2.9 million viewers overall) matched their lows in their second week back to the lineup.

“Marvel’s Agent Carter” (0.8/2 in 18-49, 2.9 million viewers overall) held at its low level; last week’s episode delivered the show’s highest Live+3 percentage lift to date (+63%, 0.8 to 1.3). And “What Would You Do” again barely registered at 10 (0.6/2 in 18-49, 2.3 million viewers overall).