“America’s Got Talent” (8 p.m., NBC): The Olympics are over and now it’s

“America’s Got Talent” (8 p.m., NBC): The Olympics are over and now it’s almost time to award some medals on “America’s Got Talent.” The summer’s biggest hit returns with an episode that has 10 of the Top 40 acts hitting the stage to showcase their skills.

“World’s Funniest Commercials 2008” (9 p.m., TBS): Kevin Nealon and his wife, Susan Yeagley, are your hosts for the “World’s Funniest Commercials 2008.” These are those rare clever and hilarious ads that you don’t want to skim over with your DVR.

“Greek” (9 p.m., Oxygen): The freshmen’s devotion is put to the test when they learn if they have been accepted into their fraternities and sororities.

“The Janice Dickinson Modeling Agency” (10 p.m., Oxygen): “The Agency” is back for its fourth season. But there are changes ahead in this reality show. Dickinson, the self-proclaimed “world’s first supermodel,” has a new business partner. A new business plan to move from commercial to high-fashion clients. New headquarters: no longer a Hollywood storefront but a mansion in the Hollywood hills, complete with a newly designed master bedroom decorated by brother-of-Madonna Christopher Ciccone. Finally, Dickinson has a new scheme for keeping her models-in-training in tow: They will reside in this mansion with her.