Vampire Diaries (8pm, The CW) - Elena and Jeremy receive a surprise visit from an uncle, and Damon's attempt to uncover the real reason he's in town takes a nasty turn.
Saturday Night Live in the 2000s: Time and Again (9pm, NBC) - An SNL retrospective looks at the highs and lows of the past ten years (there are plenty of both). Look for clips featuring Will Ferrell, Jimmy Fallon, Tina Fey, Amy Poehler, Chris Kattan, Tracy Morgan, and many others. Also, some words from frequent hosts Alec Baldwin and Christopher Walken.
Fringe (9pm, Fox) - When Olivia and the gang investigate the deaths of passengers on a commuter train, they wonder if a mysterious energy drain on board has anything to do with the powerful and enigmatic Alistair Peck (Peter Weller).
Project Runway (10pm, Lifetime) - Tonight is part one of the two-part season finale.