The Ellen DeGeneres Show

(3-4 p.m., NBC10) - Actress Raven-Symone (

College Road Trip

);

Project Runway

winner Christian Siriano; trumpeter Patrick Henry Hughes.

Oprah Winfrey

(4-5 p.m., 6ABC) - Journalist Lisa Ling investigates puppy mills.

The Office

(8-8:30 p.m., NBC10) - Kevin and Andy make it their mission to reclaim parking spaces stolen from the company by other tenants in the office park.

Lost

(9-11 p.m., 6ABC) - The two-hour season finale finds the survivors and the "freighter people" getting ready to rumble. Preceded by a

Lost

re-run at 8 p.m.

Without a Trace

(10-11 p.m., CBS3) - An ultimate fighter is the missing person in this episode, having disappeared right after winning a match.

Late Show With David Letterman

(11:35 p.m.-12:35 a.m., CBS 3) - Actor Robert Downey Jr.; Alicia Keys performs.

The Tonight Show With Jay Leno

(11:35 p.m.-12:35 a.m., NBC10) - Actor Jack Black; musician Clay Aiken.

Jimmy Kimmel Live

(12:05-1:05 a.m., 6ABC) - Actress Evangeline Lilly; actor Ben Barnes; Joe Jackson performs.

The Late Late Show With Craig Ferguson

(12:35-1:35 a.m., CBS3) - Actor Kal Penn; actress Lake Bell.

Late Night With Conan O'Brien

(12:35-1:35 a.m., NBC10) - Actor Will Ferrell; actress Rashida Jones; taekwondo instructor Fred Simmons.