Two major broadcast reality shows lost ground Wednesday night, based on Nielsen overnights for the key 18-49 demo.

TVbytheNumbers.com reports that both CBS’s “Big Brother” and NBC’s “America’s Got Talent” slipped a bit from last week, both finishing with 2.2 averages in the demo as the two networks wound up in tie for first place for prime time overall.

“America’s Got Talent” was down two-tenths from a week ago in the 18-49 demo, while “Big Brother” slipped one-tenth. Meanwhile, Fox’s two-hour “So You Think You Can Dance” held steady, matching last week’s 1.1 average.

NBC and CBS tied in the 10 p.m. hour as well, with both CBS’s “Extant” and NBC’s “Taxi Brooklyn” delivering 1.1 averages in 18-49. “Extant” was even with last week while “Taxi Brooklyn” ticked up one-tenth.

ABC aired repeat programs leading up to a fresh installment of “Motive” at 10 p.m., which rose one-tenth in the 18-49 demo to a 0.7.

For prime time overall, NBC and CBS shared the top spot in viewers 18-49 with 1.5 averages, followed by Univision (1.3 average), Fox (1.1) and ABC (0.9). NBC was on top in total viewers with 7.5 million, followed by CBS (5.7 million), ABC (3.6 million), Fox (3.5 million) and Univision (3.3 million).