NBA playoffs: Heat at Hawks (6 p.m, TNT); Lakers at Jazz (8:30 p.m., TNT)
How I Met Your Mother (7 p.m., Ch. 2): The gang crashes a swanky party.
Dancing With the Stars (7 p.m., Ch. 4): The remaining contestants perform.
Chuck (7 p.m., Ch. 5): Chuck thinks his dreams portend real-life disaster.
House (7 p.m., Ch. 13): House recalls the case of an amnesiac patient.
Two and a Half Men (8 p.m., Ch. 2): Charlie is looking for a girlfriend. Sort of.
American Experience (8 p.m., Ch. 7): A look at the history of the whaling industry in America.
24 (8 p.m., Ch. 13): Jack uncovers surprising information.
Gossip Girl (8 p.m., Ch. 30): Jenny has information that could destroy Rufus and Lily's marriage; Chuck makes a grand gesture to win Blair back.
Big Bang Theory (8:30 p.m., Ch. 2): Leonard and Sheldon compete for the attention of a physicist.
CSI: Miami (9:01 p.m., Ch. 2): A suburban mother who wasn't who she seemed is murdered.
Castle (9:02 p.m., Ch. 4): Beckett asks Demming to help with a robbery-homicide case.
Law & Order (9 p.m, Ch. 5): A heiress dies of an apparent drug overdoes — but was it murder? This is "Law & Order" — of course it was!
10 Things I Hate About You (9 p.m., ABC Family): Kat goes out with Blank.
Nurse Jackie (11 p.m., Showtime): Coop sets Georgia up with Eddie.