American Idol (9pm, Fox) - Harry Connick Jr (left) and Lady Gaga perform (hopefully not together), and someone goes home.
Criminal Minds (9pm, CBS) - A serial killer commits suicide but leaves behind clues indicating one of his victims may still be alive somewhere. NFL player Greg Jennings stars as an evidence technician.
Modern Family (9pm, ABC) - Gloria surprises Jay with a trip to Hawaii for his birthday, and the entire family is coming along.
Cougar Town (9:30pm, ABC) - Jules and Grayson did the deed last week, but that may not mean they're ready for a relationship. Tonight they ponder being "friends with benefits."
Top Chef Masters (10pm, Bravo) - The champions round begins with the master chefs catering a wedding from mobile kitchens.
Sunset Daze (10pm, WeTV) - Three words that will either have you tuning in or scrubbing your scorched ears: Pole-dancing grannies.