On a night of mostly repeats on the major networks, ABC’s feel-good reality combo of ”Secret Millionaire” and ”Extreme Makeover: Weight Loss Edition” were on the rise to help lift the Alphabet over its rivals among young-adult viewers.

Fox’s ”Family Guy” repeat was the top broadcast program in the key 18-49 demo, while CBS led in total viewers, according to preliminary national estimates from Nielsen.

”Secret Millionaire” was the top-rated broadcast program in key demos at 8 p.m. (1.5/5 in 18-49, 5.6 million viewers overall), and ”Extreme Makeover: Weight Loss Edition” (1.5/4 in 18-49, 4.5 million viewers overall) led in most categories as well from 9 to 11; each was up about 25% week to week and lifted ABC to its strongest regular-lineup of the summer. Also for the net, A repeat ”America’s Funniest Home Videos” ran second in most categories at 7 (1.0/4 in 18-49, 4.5 million viewers overall).

Fox claimed the top broadcast program of the night among young adults with a special 9:30 p.m. repeat airing of ”Family Guy” (1.8/5 in 18-49, 3.9 million viewers overall), which built a bit in most categories from the regular 9 p.m. repeat (1.7/5 in 18-49, 3.6 million viewers overall). The net opened the night with repeats of ”American Dad” (0.7/2 in 18-49, 1.7 million viewers overall) and ”The Cleveland Show” (0.8/3 in 18-49, 2.0 million viewers overall), followed by a pair of ”The Simpsons” encores at 8 (1.2/4 in 18-49, 3.0 million viewers overall) and 8:30 (1.3/4 in 18-49, 3.1 million viewers overall).

NBC had its best showing Sunday in the night’s opening hour with ”Dateline” (1.1/4 in 18-49, 5.8 million viewers overall), which led its timeslot in adults 18-49 and 25-54 (1.6/5) and drew its largest audience on the night since March 18. The newsmagazine was followed by encores of ”America’s Got Talent” at 8 (1.0/3 in 18-49, 4.9 million viewers overall) and 10 (0.9/3 in 18-49, 3.8 million viewers overall).

CBS ranked fifth among the broadcasters in all under-55 categories while winning the night easily in total viewers. It aired ”60 Minutes” (0.9/3 in 18-49, 7.3 million viewers overall), the night’s most-watched program overall, and then a special second edition of the news program at 8 p.m. (0.8/3 in 18-49, 5.6 million viewers overall). Closing things out were repeats of ”The Good Wife” (0.5/2 in 18-49, 4.3 million viewers overall) and ”The Mentalist” (0.5/1 in 18-49, 4.6 million viewers overall).

Univision did solid numbers from 8 to 10 p.m. with special coverage of the wedding of entertainment figures Eugenio Derbez and Alessandra Rosaldo (1.3/4 in 18-49, 3.3 million viewers overall), tying as the No. 5 broadcast program of the night in 18-49.

Preliminary 18-49 averages for the night: ABC, 1.4/4; Fox, 1.3/4; Univision, 1.1/3; NBC, 1.0/3; CBS, 0.7/2.

In total viewers: CBS, 5.5 million; ABC, 4.8 million; NBC, 4.5 million; Univision, 3.0 million; Fox, 2.9 million.