“America’s Got Talent” lifted NBC to a primetime victory among the broadcast networks Tuesday.

The two-hour “Talent” (2.8 rating/8 share among viewers 18-49, 10.1 million viewers overall) won easily against the next-best performer among its competition in the demo at 9 p.m., the second hour of Fox’s “So You Think You Can Dance” (1.4/4, 4.1 million for the night).

“Dance” was tops in 18-49 at 8 p.m.

ABC had middling numbers from first-run programming: a two-hour “Extreme Weight Loss” (1.1/4, 3.7 million) and a Barbara Walters-hosted “20/20” special on Britain’s royal baby (0.9/3, 4,2 million). “Extreme” had its biggest aud in a month.

CBS had a night of reruns in “NCIS” (0.9/3, 7.1 million), “NCIS: Los Angeles” (0.8/2, 5.8 million) and “Person of Interest” (0.8/2, 5.0 million).

NBC’s night began with a pair of “Hollywood Game Night” reruns (1.0/3, 3.4 million for the hour), while the CW aired two episodes of “Whose Line Is It Anyway” (0.9/3, 2.3 million) followed by back-to-back editions of “Perfect Score” (0.3/1, 0.9 million).

Preliminary 18-49 averages for the night: NBC 2.2/7, Univision 1.6/5, Fox 1.4/4, ABC 1.0/3, CBS 0.8/3, CW 0.6/2.

In total viewers: NBC 7.9 million, CBS 6.0 million, Fox 4.1 million, Univision 4.0 million, ABC 3.9 million, CW 1.6 million.