Baseball’s All-Star Game on Fox and “America’s Got Talent” on NBC were the top draws on Tuesday, but CW got off to a promising start with its “Whose Line Is It Anyway?” revival hosted by Aisha Tyler.

According to preliminary national estimates from Nielsen, “Whose Line Is It Anyway” averaged a 1.1 rating/4 share in adults 18-49, a 1.2/4 in adults 18-34 and 2.9 million viewers overall in the 8 o’clock hour, holding steady or edging up in all categories in its second half hour. It beat out ABC’s “Extreme Weight Loss” in 18-49 while tying a repeat of “Hollywood Game Night” on NBC.

The net has been pretty dark this summer, last week averaging a mere 0.2 rating in the demo and barely 600,000 viewers overall across the week — so the “Whose Line” premiere was about five times bigger.

This was CW’s best unscripted series premiere in adults 18-34 (1.2/4) since January 2009, and the best for any series premiere on the network since September 2011.

Following “Whose Line” was the premiere of dating competition series “Perfect Score,” which did a 0.4/1 in 18-49 and nearly 1 million viewers at 9 p.m. and a 0.3/1 in the demo and about 800,000 viewers with its second episode at 9:30.

At Fox, the Major League Baseball All-Star Game averaged a 3.0 rating/9 share in adults 18-49 and 10.3 million viewers overall on the net’s stations from 8 to 11, with the nationals expected to edge up and finish in line with last year’s game (3.2/10 in 18-49, 10.9 million viewers overall.

NBC opened with an encore of “Hollywood Game Night” (1.1/4 in 18-49, 4.0 million viewers overall), followed by a two-hour “America’s Got Talent” (2.5/7 in 18-49, 9.8 million viewers overall), which was in line with last week despite facing the baseball all-star game.

ABC’s “Extreme Weight Loss” (1.1/3 in 18-49, 3.5 million viewers overall) matched last week’s score, and was followed by a repeat of “Body of Proof” (0.7/2 in 18-49, 3.0 million viewers overall).

CBS aired repeats of its dramas “NCIS” (1.3/4 in 18-49, 8.6 million viewers overall), “NCIS: Los Angeles” (0.9/3 in 18-49, 6.1 million viewers overall) and “Person of Interest” (0.9/3 in 18-49, 4.9 million viewers overall).

Preliminary 18-49 averages for the night: Fox, 3.0/9; NBC, 2.0/6; Univision, 1.5/4; ABC and CBS, 1.0/3; CW, 0.7/2; Telemundo, 0.6/2.

In total viewers: Fox, 10.3 million; NBC, 7.9 million; CBS, 6.5 million; Univision, 4.0 million; ABC, 3.3 million; CW, 1.9 million; Telemundo, 1.5 million.