TV Today

The Ellen DeGeneres Show

(3 p.m., NBC10) - Ryan Reynolds; Joan and Melissa Rivers; 7-year-old piano prodigy Emily Bear.

Oprah Winfrey (4 p.m., 6ABC) - Elizabeth Edwards, wife of former Sen. John Edwards.

Great American Road Trip (8 p.m., NBC10) - The six remaining families leave St. Louis to experience the famous Meramec Caverns. Later, the contestants drive into Branson, Mo., where they must perform skits.

House (8 p.m., Fox29) - While treating a former cancer researcher who gave up her career to pursue her own personal happiness, House and his staff begin to question their own life choices.

MLB Baseball (8 p.m., ESPN) - The Home Run Derby, the annual warm-up event to the All-Star Game, features eight of the game's best power hitters - the Phillies' Ryan Howard is one - taking aim at the fences at St. Louis' Busch Stadium.

Lie to Me (9 p.m., Fox29) - Lightman becomes obsessed with his investigation of two women who committed suicide. The team tries to recover billions of dollars for investors who were scammed by a Ponzi scheme.

Late Show With David Letterman (11:35 p.m., CBS3) - Jonah Hill; Metric performs.

The Tonight Show With Conan O'Brien (11:35 p.m., NBC10) - Comic Bill Engvall; a performance from the cast of Broadway's Hair.

Jimmy Kimmel Live (12:06 a.m., 6ABC) - Basketball players Kobe Bryant and Derek Fisher; 3OH!3 performs.

The Late Late Show With Craig Ferguson (12:37 a.m., CBS3) - Columnist Connie Schultz.

Late Night With Jimmy Fallon (12:37 a.m., NBC10) - Dylan McDermott; talk show host Wendy Williams.