CBS had a solid debut for its new summer series and pulled out a win for prime time overall Wednesday night, based on Nielsen overnights for the key 18-49 demo.

TVbytheNumbers.com reports that the new drama series "Extant" delivered a 1.7 average in viewers 18-49, nowhere near the 3.3 delivered a year ago by the series premiere of "Under the Dome" and also below the 2.1 turned in by "Dome's" season two premiere. But "Extant" ranked as summer 2014's highest-rated series premiere.

"Extant" was down a bit from its lead-in, as CBS's "Big Brother" rose 6% from last week to a 1.9 average in 18-49, the best demo number of any broadcast program on Wednesday prime. CBS closed out prime time with a "Criminal Minds" repeat (1.2 average).

Second-place NBC filled two hours of prime time with an "America's Got Talent" repeat, which yielded a 1.5 average in the 18-49 demo, before rolling out "Taxi Brooklyn," which matched last week's 1.0.

Fox's two-hour "So You Think You Can Dance" pulled in a 1.2 average in adults 18-49, off 14% from last week.

ABC aired just one fresh program, "Motive," which matched its most recent original with a 0.8 average in 18-49.

For prime time overall, CBS's 1.6 average in viewers 18-49 was the best among the broadcast nets, followed by NBC (1.3 average), Fox and Univision (both 1.2) and ABC (1.0). CBS also came out on top in total viewers, averaging 7.3 million to lead NBC (5.5 million), ABC (3.8 million), Fox (3.7 million) and Univision (2.9 million).