CBS’ “Survivor” and “CSI,” two shows that have been on the air since 2000, won their hours in key demos Wednesday, a night on which ABC’s “Modern Family” remained the top demo draw overall but its leadout “Mixology” fumbled away more than half of that young-adult audience.

CBS and Fox were in a virtual for the night’s leadership in adults 18-49, adults 25-54 and total viewers.

According to preliminary national estimates from Nielsen, “Survivor” opened the night for CBS with a timeslot-leading 2.5 rating/8 share in adults 18-49 and 9.9 million viewers overall, up slightly from last week despite the start of Daylight Saving Time. CBS aired basketball in some markets in the 8 o’clock hour, so its numbers could be adjusted in the nationals, but if it holds, this would mark the reality adventure series’ first-ever head-to-head victory over Fox’s “American Idol” in both categories.

“Criminal Minds” followed at 9 p.m. for CBS (2.3/7 in 18-49, 10.7 million viewers overall), down from last week and on the low side of its range but the night’s most-watched scripted program; it finished closely “American Idol” and ABC’s comedy block in 18-49 while finishing about on par with the music contest in total viewers. Closing out the night, “CSI” (2.0/6 in 18-49, 10.0 million viewers overall) bounced back from a sub-par showing last week to open up some distance over NBC’s “Chicago PD” (which was up slightly itself) and ABC’s “Nashville.”

At Fox, “American Idol” (2.4/7 in 18-49, 10.1 million viewers overall) was down about 10% from last week for another Wednesday low in 18-49, but it did edge out the “Survivor”-“Criminal Minds” combo in 18-49.

ABC opened with “The Middle” (1.9/7 in 18-49, 7.2 million viewers overall), which matched last week’s rating (and went up in share due to fewer viewers watching television in the first week of Daylight Saving Time), but “Suburgatory” was down at 8:30 (1.4/5 in 18-49, 5.2 million viewers overall). “Modern Family” (3.3/10 in 18-49, 9.1 million viewers overall) was about at last week’s level and was Wednesday’s No. 1 show in most key demos, but “Mixology” dropped off from last week’s 1.7 rating, which had matched its premiere score of two weeks ago. Closing things out was “Nashville” (1.4/4 in 18-49, 4.9 million viewers overall), which was down slightly from last week and placed third among the hour’s broadcast dramas.

At NBC, “Revolution” (1.3/4 in 18-49, 4.7 million viewers overall) matched last week’s score despite the start of Daylight Saving Time, and “Law & Order: SVU” held steady at 9 (1.6/5 in 18-49, 6.3 million viewers overall). “Chicago PD” (1.6/5 in 18-49, 5.8 million viewers overall) was up a tick from last week to pull back ahead of “Nashville”; the Dick Wolf drama looks to be a lock to return for a second season.

CW aired repeats of “Arrow” (0.4/1 in 18-49, 1.2 million viewers overall) and “The Tomorrow People” (0.2/1 in 18-49, 0.7 million viewers overall).

Preliminary 18-49 averages for the night: Fox, 2.4/7; CBS, 2.3/7; ABC, 1.8/6; NBC, 1.5/5; CW, 0.3/1.

In total viewers: CBS, 10.2 million; Fox, 10.1 million; ABC, 5.9 million; NBC, 5.6 million; CW, 0.9 million.