NBC won every hour of primetime on Tuesday night, driven by an unmoved episode of This Is Us.

The drama again averaged a live 2.8 rating among adults 18-49, pulling 10.5 million viewers to the network at 9 p.m. The Voice (2.1 adults) saw a minor drop at 8 p.m., while Law & Order True Crime: The Menendez Murders held an even 1.1 rating in the key demo — tying CBS' NCIS: New Orleans at 10 p.m.

Elsewhere on CBS, NCIS earned a 1.3 rating among adults 18-49 and dominated the evening's audience race with an average 12.4 million viewers. Bull garnered a 1.2 rating in the key demo.

ABC freshman The Mayor shed two-tenths of a point to drop to a 0.8 rating among adults 18-49. That low tied fellow newcomer Kevin (Probably) Saves the World, while returning comedies The Middle (1.3 adults), Fresh Off the Boat (1.1 adults) and Black-ish (1.2 adults) were all steady.

Fox had new episodes of Lethal Weapon (0.9 adults), The Mick (0.8 adults) and Brooklyn Nine-Nine (0.6 adults).

The CW had The Flash (0.9 adults) and Legends of Tomorrow (0.5 adults).