A couple of networks turned in some OK numbers Tuesday night, breaking out momentarily from what has been a summer of ratings doldrums.

Fox and NBC both showed signs of life, even though they wound up in a dead heat. TVbytheNumbers.com reports that both networks came in with 2.2 average ratings for prime time in the key 18-49 demo, based on Nielsen overnights.

CBS and ABC, on the other hand, appeared to give up, airing nothing but reruns Tuesday night — with CBS’s all-repeat lineup trouncing ABC’s all-repeat lineup in the battle to avoid the cellar. CBS averaged a 1.1 rating in the 18-49 demo for reruns of “NCIS,” “NCIS: Los Angeles” and “48 Hours Mystery,” while ABC could muster only a 0.7 for repeats of “Last Man Standing” and a two-hour “Extreme Makeover: Weight Loss.”

In the middle of the big 4 — finishing third overall — was Univision with a 1.3 average in 18-49.

In total viewers, NBC led the way with an average of 7.8 million for prime time, topping CBS (6.7 million), Fox (5.3 million), Univision (3.4 million) and ABC (2.6 million).

The biggest show of the night was NBC’s “America’s Got Talent,” which was up 7% from its most recent Tuesday original episode, averaging a 3.2 in viewers 18-49. NBC’s “Love in the Wild” also saw improvement, scoring a 1.6 to equal its best number in almost a year and bouncing back 23% from last week’s season low.

Fox was in its usual ballpark with 2.2 averages in 18-49 for both “Hell’s Kitchen” and “MasterChef.”