CBS won Thursday in the adults 18 to 49 demographic, but Fox had the honor of the highest-rated show for the night with its summer reality series “So You Think You Can Dance.”

At 9 p.m. (ET) “Dance” scored a 3.2 in the demo, a number that includes live viewing plus same-day viewing via digital video recorder. Repeats of CBS’s “CSI” and “Without a Trace” tied for second place in adults 18 to 49 at 2.8.

Among other original summer programming, CBS’s finale of “Gameshow Marathon” scored a 1.8, which won the network the 8 p.m. hour despite matching its series-low ratings performance. “Gameshow” eclipsed ABC’s 8 p.m. offering, the second episode of “Master of Champions” (1.6). “Champions” was down 20 percent in the demo from its premiere.

On NBC, the summer drama “Windfall” scored a 2.0 in the demo at 10 p.m., a series low.