TV Today

The Ellen DeGeneres Show

(3-4 p.m., NBC10) - Janet Jackson performs; actor Josh Holloway (

Lost

); actor Mario Lopez discusses his fitness book.

Oprah Winfrey

(4-5 p.m., 6ABC) - The cast of

The Mary Tyler Moore Show

reunites.

Bones

(8-9 p.m., Fox29) - Everyone at the Jeffersonian is a suspect when a lab explosion leaves Zack severely injured, and Gormogon's silver skeleton disappears from the basement.

Two and a Half Men

(9-9:30 p.m., CBS3) - Charlie develops an attraction to a self-help author (Susan Blakely) who's considerably older.

House

(9-10 p.m., Fox29) - In the conclusion of the two-part season finale, House struggles to regain the memory he lost in the bus crash in order to save a patient's life.

The Bachelorette

(9:02-11 p.m., 6ABC) - DeAnna Pappas, a Georgia real estate agent who appeared in last fall's edition of

The Bachelor,

selects a gentleman friend from a field of 25 hopefuls.

Late Show With David Letterman

(11:35 p.m.-12:35 a.m., CBS3) - Actor Kevin Spacey; Sen. Jim Webb (D., Va.); Sara Bareilles performs.

The Tonight Show With Jay Leno

(11:35 p.m.-12:35 a.m., NBC10) - Reality show judge Simon Cowell; actor Rob Schneider; singer Josh Groban.

Jimmy Kimmel Live

(12:05-1:05 a.m., 6ABC) - Actor Ashton Kutcher; actress Isabella Rossellini; Gavin DeGraw performs.

The Late Late Show With Craig Ferguson

(12:35-1:35 a.m., CBS3) - Author Valerie Bertinelli; model Paulina Porizkova; Estelle performs.

Late Night With Conan O'Brien

(12:35-1:35 a.m., NBC10) - Actor Kevin Nealon; DeVotchKa performs.