Fox’s first-run comedies struggled to attract much of an audience Tuesday opposite the Winter Olympics as NBC again easily beat its combined broadcast competition.

According to Nielsen estimates, Olympics action including figure skating, snowboarding and women’s freestyle skiing averaged a 6.6 rating/18 share in adults 18-49 and 23.7 million viewers overall from 8 to 11 p.m., rising a bit in the demo from Monday’s prelim score (6.4/17). The 6.6 in 18-49 was more than five times greater than any of NBC’s rivals on Tuesday (runner-up Fox did a 1.2), and was double the combined ABC-CBS-Fox-CW tally (3.3).

In the metered-market overnights, the Olympics did a 14.5 household rating — up from Monday’s 13.7. The top local markets were Minneapolis (21.8/36), Salt Lake City (21.0/38) and Denver (18.6/31).

At Fox, the one-hour season finale of “Dads” (pictured) fell to a series-low 1.1/3 in 18-49 and 2.6 million viewers overall, finishing about on par in the demo with a pair of “The Goldbergs” repeats on ABC. Also posting lows, and down two-tenths apiece from last week, were “New Girl” (1.3/4 in 18-49, 3.0 million viewers overall) and “Brooklyn Nine-Nine” (1.2/3 in 18-49, 2.9 million viewers overall). The 9 o’clock hour comedies will air repeats next week and then hope to regroup on Feb. 25, when “Glee” debuts on its new night as serves as their lead-in.

CBS aired encores of its dramas “NCIS” (1.3/4 in 18-49, 9.6 million viewers overall), “NCIS: Los Angeles” (1.2/3 in 18-49, 7.9 million viewers overall) and “Person of Interest” (0.9/2 in 18-49, 5.8 million viewers overall), with the “NCIS” duo combining to outperform the original Fox comedies in 18-49.

ABC aired three repeats of “The Goldbergs,” which oddly posted its lowest numbers in its regular 9 p.m. timeslot (0.9/2 in 18-49, 2.9 million viewers overall); the 8 p.m. encore did a 1.1/3 in 18-49 and 4.1 million total viewers, and the 8:30 p.m. episode did a 1.0/3 and 3.4 million. A repeat of “Trophy Wife” followed at 9:30 p.m. (0.7/2 in 18-49, 2.0 million viewers overall), and an original episode of drama “Killer Women” closed things out (0.7/2 in 18-49, 3.0 million viewers overall), matching its score of last week when it followed a “Trophy Wife” repeat (which did a 0.9).

CW aired a special repeat of the movie “Attack of the Block” (0.2/1 in 18-49, 0.8 million viewers overall).

Preliminary 18-49 averages for the night: NBC, 6.6/18; Fox and Univision, 1.2/3; CBS, 1.1/3; ABC, 0.8/2; Telemundo, 0.5/1; CW, 0.2/1.

In total viewers: NBC, 23.7 million; CBS, 7.8 million; ABC and Univision, 3.1 million; Fox, 2.8 million; Univision, 1.3 million; CW, 0.8 million.