House, Gossip Girl, and Castle

Season 6 finale, 8 p.m., FOX


House (Hugh Laurie), Cuddy (Lisa Edelstein), and the rest of the team help out a search-and-rescue squad as they attempt to remove people who are trapped in the rubble of a collapsed building—and House finds out that Cuddy is moving in with Lucas (Michael Weston). Poor guy.

Season 7 finale, 8 p.m., CW

One Tree Hill

The group heads to Utah for the premiere of Julian's (Austin Nichols) film, and Haley (Bethany Goy Galeotti) hopes that the trip will lift her sinking spirits. Wow. As much as I think OTH has overstayed its welcome on TV, if this turns out to be the series finale it would be a really depressing way for the show to end.

Season 3 finale, 9 p.m., CW

Gossip Girl

Blair (Leighton Meester) has to make a choice about her future with Chuck (Ed Westwick), Nate (Chace Crawford) and Serena's (Blake Lively) relationship is tested by a Gossip Girl post about Dan (Penn Badgely), and Georgina (Michelle Trachtenberg) makes yet another return to the Upper East Side.

9:30 p.m., CBS

The Big Bang Theory

Storytime! Leonard (Johnny Galecki) tells Penny (Kaley Cuoco) the story of how he and Sheldon (Jim Parsons) met, which can only mean one thing: flashbacks!

Season 2 finale, 10 p.m., ABC


Castle (Nathan Fillion) and Beckett (Stana Katic) investigate the assassination of a covert agent—and, apparently, come to terms with the fact that they are totally hot for each other. Finally. Let's hope they turn that URST into RST, people.

12:35 a.m., NBC

Late Night with Jimmy Fallon

Jimmy welcomes Bones star/hottie David Boreanaz.

Also on the airwaves...
Dancing with the Stars, 8 p.m., ABC
How I Met Your Mother, 8 p.m., CBS
Chuck, 8 p.m., NBC
10 Things I Hate About You, 8 p.m., ABC Family
Rules of Engagement, 8:30 p.m., CBS
Two and a Half Men, 9 p.m., CBS
24, 9 p.m., FOX
Law and Order, 9 p.m., NBC
Romantically Challenged, 9:30 p.m., ABC
CSi: Miami, 10 p.m., CBS
The Real Housewives of New Jersey, 10 p.m., BRAVO
Nurse Jackie, 10 p.m., SHO
United States of Tara, 10:30 p.m., SHO
NBA Basketball Playoffs: Suns v. Lakers
MLB Baseball: Red Sox v. Yankees

What are you watching tonight?

Follow writer Stefanie Lee on Twitter: @StefAtTVDotCom

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