The Ellen DeGeneres Show

(3 p.m., NBC10) - David Spade (

Rules of Engagement

);

Dancing With the Stars

contestants Gilles Marini and Cheryl Burke.

Walk the Line (8 p.m., CBS3) - Joaquin Phoenix was nominated for an Oscar for his portrayal of the Man in Black, Johnny Cash, and Reese Witherspoon won one as June in this 2005 biopic. And yes, that is Phoenix and Witherspoon singing.

Nature's Most Amazing Events (8 p.m., DISC) - The BBC and Discovery Channel, which coproduced the stunning Planet Earth, team up again for this six-part series spotlighting Earth's natural diversity as reflected in dramatic seasonal events. "Arctic Summer," the first episode, looks at how the melting of sea ice transforms the Arctic into a region of eye-popping beauty.

American Beauty (8 p.m., TNT) - This 1999 comedy-drama won five Oscars. Kevin Spacey took home the best-actor trophy for his portrayal of a middle-aged man having the granddaddy of all midlife crises.

Un-Broke: What You Need to Know About Money (9 p.m., 6ABC) - This one-hour crash course in the basics of money features Good Morning America financial adviser Mellody Hobson talking to Will Smith, Samuel L. Jackson, Seth Green, the Jonas Brothers, and others.

Late Show With David Letterman (11:35 p.m., CBS3) - Robin Williams; Wynton Marsalis performs.

The Tonight Show With Jay Leno (11:35 p.m., NBC10) - Conan O'Brien; James Taylor performs.

Jimmy Kimmel Live (12:06 a.m., 6ABC) - Hugh Jackman; actor John Cho; Flo Rida performs.

The Late Late Show With Craig Ferguson (12:37 a.m., CBS3) - Simon Cowell; Erin McCarley performs.