CBS convincingly captured the second Sunday of the May sweep behind the finale and reunion show of “Survivor: All-Stars,” according to preliminary nationals from Nielsen.

From 8 to about 10:10 p.m., the finale of “Survivor: All-Stars” averaged a projected 10.0 rating/25 share in adults 18-49 and 25.5 million viewers overall, besting the scores of the last three finales of the reality adventure show. The postgame reunion show (10:10-11 p.m. ET) averaged roughly a 10.4/26 in adults 18-49 and 24.5 million viewers overall.

ABC ran second with the network premiere of “Harry Potter and the Sorcerer’s Stone” (3.8/10 in adults 18-49, 11.1 million viewers overall), which did especially well among teens and kids.

Both NBC and Fox were well below their normal averages, led respectively by “The Simpsons” at 8:30 (3.2/8 in adults 18-49, 7.0 million viewers overall) and “Crossing Jordan” at 10 (3.8/9 in adults 18-49, 11.8 million viewers overall).

Preliminary 18-49 averages for the night: CBS, 8.1/22; ABC, 3.8/10; NBC, 2.6/7; Fox, 2.5/7; WB, 0.9/3.

In total viewers: CBS, 21.1 million; ABC, 11.1 million; NBC, 9.0 million; Fox, 5.3 million; WB, 1.9 million.