A two-hour ”Wipeout” and the first of a two-part ”Rookie Blue” lifted ABC to its strongest non-sports summer Thursday in more than a year and a victory in key demos. CBS did well for most of the night but auds disappeared late when new dating show ‘3’ hit the air.

According to preliminary national estimates from Nielsen, ”Wipeout” extended to two hours with success for ABC (2.2/7 in 18-49, 6.7 million viewers overall), rising 29% from last week’s hourlong episode to hit a summer high and edge out CBS’ programming for the 8-10 p.m. block. And at 10, cop drama ”Rookie Blue” was up for a second straight week (1.5/5 in 18-49, 5.7 million viewers overall), outperforming its last 17 episodes going back to early July of last year.

At CBS, repeats of ”The Big Bang Theory” (2.2/8 in 18-49, 7.8 million viewers overall) and ”Two and a Half Men” (2.0/7 in 18-49, 6.8 million viewers overall) easily led the opening hour, and ”Big Brother” followed with a solid second-place finish at 9 (2.2/7 in 18-49, 6.0 million viewers overall), on par with last week; ”Brother” tied with ”Two and a Half Men” and ”Wipeout” as the night’s top shows in 18-49 rating.

Closing things out with a thud, and keeping CBS from winning the night, was a special preview of new dating series ”3” (0.8/2 in 18-49, 2.4 million viewers overall), which will be airing Sundays at 9; the net did better in this timeslot a week ago with a repeat of ”Person of Interest.”

Fox ran third in the night’s opening hour with the finale of dating show ”Take Me Out” (1.2/4 in 18-49, 2.9 million viewers overall), which was flat week to week. It was followed by an encore of ”Glee” (0.6/2 in 18-49, 1.7 million viewers overall), which premiered on its new timeslot that will continue into the fall.

NBC aired repeats of ”The Office” (0.7/2 in 18-49, 2.6 million viewers overall) and ”Parks and Recreation” (0.6/2 in 18-49, 1.7 million viewers overall) followed by original episodes of drama ”Saving Hope” (0.6/2 in 18-49, 2.9 million viewers overall) and newsmag ”Rock Center” (0.8/2 in 18-49, 3.7 million viewers overall), which were both up a tick from last week.

Univision won the 10 p.m. hour in 18-49 with ”La Que No Podia Amar” (The One Who Couldn’t Love), which averaged a 1.7/5 in the demo while drawing 4.3 million viewers overall.

Preliminary 18-49 averages for the night: ABC, 1.9/6; CBS, 1.7/5; Univision, 1.3/4; Fox, 0.9/3; NBC, 0.7/2; CW, 0.3/1.

In total viewers: ABC, 6.4 million; CBS, 5.2 million; Univision, 3.6 million; NBC, 2.9 million; Fox, 2.3 million; CW, 0.8 million.