CBS’ “Big Brother” opened up some distance on NBC’s “America’s Got Talent” on Wednesday as the night’s top show among young adults, as the former was on the rise while the latter joined Fox’s “So You Think You Can Dance” in falling to lows. Also of note, CW’s “Penn & Teller: Fool Us” hit a series high in its fourth week.

According to preliminary “live plus same-day” national estimates from Nielsen, “Big Brother” averaged a 2.3 rating/8 share in adults 18-49 and 6.6 million viewers overall in the 8 o’clock hour, dominating the time period and standing as the night’s No. 1 show in 18-49 and 25-54 (2.7/9). “Brother” was up a tenth in 18-49 from last week (as well as the comparable night last year), matching its highest score on any night this summer.

The Eye followed “Big Brother” with two original hours of Halle Berry drama “Extant” (1.0/3 in 18-49, 5.5 million viewers overall at 9 and 0.9/3 in 18-49, 5.7 million viewers overall at 10), which matched its hourlong, series-low rating of last week. It again won the three-network original-drama battle at 10 p.m. in 18-49 (tie), 25-54 and total viewers.

At NBC, “America’s Got Talent” (1.8/6 in 18-49, 9.2 million viewers overall) was down a tenth for its series low, remaining the night’s No. 2 show in demos and No. 1 in total viewers. The Peacock opened the night with a “Talent” repeat (1.1/4 in 18-49, 5.6 million viewers overall) and closed with original drama “Taxi Brooklyn” (0.9/3 in 18-49, 4.9 million viewers overall), which matched last week’s score and tied CBS’ “Extant” in 18-49 (at least in the prelims).

Fox’s “So You Think You Can Dance” (0.9/3 in 18-49, 3.4 million viewers overall) was down a tenth to its series low, and was again beaten by ABC’s repeat comedy block of “The Middle” (0.9/3 in 18-49, 3.3 million viewers overall), “The Goldbergs” (0.9/3 in 18-49, 3.1 million viewers overall) and “Modern Family” at both 9 (1.2/4 in 18-49, 3.5 million viewers overall) and 9:30 (1.2/4 in 18-49, 3.8 million viewers overall).

The Alphabet wrapped the night with firstrun drama “Motive” (0.8/3 in 18-49, 3.8 million viewers overall), which was up from the 0.7 it did with its two most recent originals. The Canadian crime series matched a nine-week high in adults 25-54 (1.2/3).

At CW, “Penn & Teller: Fool Us” (0.6/2 in 18-49, 1.7 million viewers overall) was up a tenth to its series high in 18-49 while drawing its second largest overall audience to date.

Preliminary 18-49 averages for the night: CBS, 1.4/5; Univision, 1.3/5; NBC, 1.3/4; ABC and Fox, 0.9/3; Telemundo, 0.7/2; CW, 0.4/1.

In total viewers: NBC, 6.6 million; CBS, 5.9 million; ABC, 3.6 million; Fox, 3.4 million; Univision, 3.2 million; Telemundo, 1.5 million; CW, 1.1 million.