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NBC dominated Tuesday’s primetime ratings race thanks to winning performances by “America’s Got Talent” and “Hollywood Game Night,” both of which shot up week to week.

According to preliminary “live plus same-day” estimates from Nielsen, “America’s Got Talent” was Tuesday’s No. 1 program in adults 18-49 (2.5 rating/9 share), up 14% (0.3) from last week and coming within a tenth of its season high. It was also the night’s most-watched program overall, establishing a season high in the total-viewer category.

“Hollywood Game Night” (1.5/5 in 18-49, 5.3 million viewers overall) spiked 36% (0.4) from last week’s season-low national average, tying its series high in the demo (at least in the prelims) and logging its second largest overall audience to date. Tuesday’s hour likely got a boost from celebrity contestant Nick Cannon of “America’s Got Talent.” “Game Night” was the night’s No. 2 program in 18-49, behind only “Talent.”

At CBS, “Zoo” (1.1/4 in 18-49, 6.7 million viewers overall) was up a tick from last week and remains summer’s most-watched new series. It was sandwiched by encores of “NCIS” (1.0/4 in 18-49, 8.3 million viewers overall) and “NCIS: New Orleans” (0.8/3 in 18-49, 6.1 million viewers overall), both of which were on the high end of their summer ranges.

ABC continues to be a non-factor on Tuesdays with repeats of “Fresh Off the Boat” (0.6/2 in 18-49, 2.5 million viewers overall) and “Black-ish” (0.6/2 in 18-49, 2.1 million viewers overall) and an original two-hour “Extreme Weight Loss” (0.7/2 in 18-49, 2.4 million viewers overall).

Similarly, Fox muddled through the night with “Are You Smarter Than a 5th Grader” (0.6/2 in 18-49, 2.5 million viewers overall), which was even week to week, and special off-night repeats of Sunday comedies “Brooklyn Nine-Nine” (0.5/2 in 18-49, 1.4 million viewers overall) and “The Last Man on Earth” (0.4/1 in 18-49, 1.2 million viewers overall).

CW aired repeats of “The Flash” (0.4/1 in 18-49, 1.1 million viewers overall) and “iZombie” (0.3/1 in 18-49, 0.8 million viewers overall).

Preliminary 18-49 averages for the night: NBC, 2.1/7; CBS, 1.0/3; Univision, 0.8/3; Telemundo, 0.7/2; ABC, 0.6/2; Fox, 0.5/2; CW, 0.3/1.

In total viewers: NBC, 9.2 million; CBS, 7.0 million; ABC, 2.3 million; Univision, 2.1 million; Fox, 1.9 million; Telemundo, 1.7 million; CW, 1.0 million.