America's Got Talent
The balance of power shifts in this first live show of the season, which will be judged by viewers. Nick Cannon hosts as 12 of the top 60 acts take the stage at New York's iconic Radio City Music Hall for a shot at the $1-million prize. NBC/Citytv, 8 p.m.
Who Do You Think You Are?
Celebrities allow cameras to follow their journeys as they delve into their family histories as this series has its TLC debut. In the premiere, American Idol winner Kelly Clarkson uncovers an ancestor with impressive military credentials. TLC, 8 p.m.
Eric Roberts battles a bizarre half-shark-half-octopus creature from the deep in this original Roger Corman film. One of Hollywood's most prolific directors, Corman has gained a cult following for such low-budget B-movies. Space, 8 p.m.
George Stroumboulopoulos: Eli Roth
Jay Leno: Aaron Paul, Selena Gomez
David Letterman: Hugh Jackman, Lisa Kudrow
Jimmy Kimmel: Channing Tatum, Paul Feig
Craig Ferguson: Larry King, Anna Camp
Jimmy Fallon: Louis C.K., Shailene Woodley
The Daily Show: Richard Haass
Conan O'Brien: Aubrey Plaza, Kumail Nanjiani