TV Today

The Ellen DeGeneres Show

(3 p.m., NBC10) - Vince Vaughn; Pete Yorn and Scarlett Johansson perform.

Heroes (8 p.m., NBC10) - Lydia issues a warning to Samuel as he gets ready for new additions to his family.

Trauma (9 p.m., NBC10) - A man goes on a shooting rampage in an office building.

Latin Music USA (9 p.m., WHYY TV12) - Jimmy Smits narrates this survey of American music from the surging popularity of the mambo and the cha-cha to rock and salsa.

Greek (9 p.m., FAM) - A baffled Casey goes on a personal mission to find out what is behind Cappie and Evan's friendship, a quest that leads her into the Amphora lair.

The Big Bang Theory (9:31 p.m., CBS3) - Sheldon has a solution to Raj's problem, but it leaves Leonard and Penny dealing with Howard as a third wheel.

CSI: Miami (10 p.m., CBS3) - When Miami's most hated man is murdered, the CSI team searches for his killer and his hidden treasure.

The Jay Leno Show (10 p.m., NBC10) - Dana Carvey; Justin Timberlake.

Late Show With David Letterman (11:35 p.m., CBS3) - Garry Shandling; Kaley Cuoco; Tim McGraw performs.

The Tonight Show With Conan O'Brien (11:35 p.m., NBC10) - Jamie Foxx; Jason Alexander.

Jimmy Kimmel Live (12:06 a.m., 6ABC) - David Duchovny; NBA player Carmelo Anthony; Kid Cudi performs.

The Late Late Show With Craig Ferguson (12:37 a.m., CBS3) - David Boreanaz; author Mitch Albom; Dierks Bentley performs.

Late Night With Jimmy Fallon (12:37 a.m., NBC10) - Kathie Lee Gifford; Penn Badgley; Love and Theft performs.