9 p.m., ABCMatthew Fox) camp merges with the Locke monster's (Terry O'Quinn) camp. Will anyone get voted off the island?
9 p.m., FOXMatthew Morrison) encourages New Directions to sing Madonna hits to empower the ladies and teach the guys a lesson about respecting their female choir-mates. Plus, Kurt (Chris Colfer) and Mercedes (Amber Riley) give Sue (Jane Lynch) a very vogue makeover.
10 p.m., FXTimothy Olyphant) must search for a lost art collection owned by a wealthy man who committed suicide—all while contending with the man's widow, who won't stop hitting on him. Creepy.
12:35 a.m., CBS
Also on the airwaves...
Dancing with the Stars, 8 p.m., ABC
American Idol, 8 p.m., FOX
The Biggest Loser, 8 p.m., NBC
RuPaul's Drag Race, 9 p.m., VH1
V, 10 p.m., ABC
Parenthood, 10 p.m., NBC
Law and Order: Criminal Intent, 10 p.m., USA
NBA Basketball Playoffs: Heat v. Celtics, Thunder v. Lakers
MLB Baseball: Cubs v. Mets
NHL Hockey Playoffs: Blackhawks v. Predators, Sharks v. Avalanche
What are you watching tonight?