Season 6 finale, 8 p.m., FOXHugh 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., CWAustin 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., CWLeighton 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., CBSJohnny 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., ABCNathan 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., NBCBones 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 TV.com writer Stefanie Lee on Twitter: @StefAtTVDotCom