“So You Think You Can Dance” 7 p.m., Fox (live)
Call her, maybe? Carly Rae Jepsen is a guest judge as the top 16 dancers perform, before two are eliminated.
“Whose Line Is It Anyway?” 7 p.m., CW (new)
Candice Accola of “The Vampire Diaries” (in a little CW cross-promotion) appears on the improv show.
“Extreme Weight Loss” 7 p.m. to 9 p.m., ABC (new)
Nurse Trina worries that she’ll become a patient if she doesn’t deal with her obesity, but she actually gains weight instead.
“America’s Got Talent” 8 p.m. to 10 p.m., NBC (live)
The talent show goes live as 12 acts give it their all at Radio City Music Hall in NYC.
“Covert Affairs” 8 p.m. to 9:01 p.m., USA (new)
After a major revelation, Annie works with Auggie and Arthur to shed light on Henry’s agenda.
“The Vineyard” 9 p.m., ABC Family (new)
This reality show is about a group of young adults who work and play in Martha’s Vineyard. In the premiere, Katie reaches a crossroads, while Ben shares a secret.
“Suits” 9:01 p.m. to 10:02 p.m., USA (new)
Harvey and Jessica take on an old nemesis, while Louis makes Mike an offer that could affect his future.