One Tree Hill Season 8

Chuck: "Quantum Leap's" Scott Bakula reprises his guest role as Chuck's (Zachary Levi) dad on a new episode of the action comedy (8 p.m. NBC).
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One Tree Hill: The long-running drama presents its season finale (8 p.m. KTLA).

Dancing With the Stars: The final four teams hit the floor in this new episode of the reality competition (8 p.m. ABC).

House: The medical drama starring Hugh Laurie ends its season (8 p.m. Fox).

Two and a Half Men: Charlie (Charlie Sheen) is haunted by the ghosts of girlfriends past in this new episode of the sitcom (9 p.m. CBS).

Gossip Girl: Michelle Trachtenberg is back as the nefarious Georgina just in time for the of the teen soap's third-season finale (9 p.m. KTLA).

Castle: It's season finale time for this nifty mystery-drama starring Nathan Fillion and Stana Katic (10 p.m. ABC).

Bizarre Foods With Andrew Zimmern: Arizona is the latest destination on this culinary travelogue (10 p.m. Travel).