America's Got Talent (8pm, NBC) - A winner is named in the Season 7 finale. Justin Bieber performs (see the Biebs again at 10 on "Rock Center").
Glee (9pm, Fox) - Season 4 begins with Rachel (Lea Michele) moving to New York City to attend NYADA, where she meets an attractive older student (Dean Geyer, right). Back at McKinley, the glee club seeks new recruits, including Puck's half brother. Kate Hudson guest stars.
Project Runway (9pm, Lifetime) - The designers create their own fabric for fashions and receive visits from their families.
Extreme Chef (10pm, Food) - The final three chefs battle in the jungles of Thailand for the $50,000 grand prize in the Season 2 finale. They work with elephants and members of a native tribe before climbing hundreds of stairs to create the perfect bite in front of a Buddhist temple.
Rock Center with Brian Williams (10pm, NBC) - Nancy Snyderman examines internet dependency and studies that equate it with drug or alcohol addiction. Also, an interview with pop star Justin Bieber.
Sullivan & Son (10pm, TBS) - In the Season 1 finale, a coworker files and HR complaint against Hank for making "inappropriate comments" (which should have been the name of this series).
Louie (10:30, FX) - In the second of a three-part "Late Show" arc, Louie continues his adventure in California while mulling an offer to host "The Late Show" after Letterman's retirement.