TV Today

The Ellen DeGeneres Show

(3 p.m., NBC10) - Actress Amy Poehler.

The Oprah Winfrey Show (4 p.m., 6ABC) - In Australia: Russell Crowe; Jay-Z; Bon Jovi; a tribute to Crocodile Hunter's Steve Irwin.

The Big Bang Theory (8 p.m., CBS3) - Bernadette runs into her ex-boyfriend (guest star Rick Fox) at a science event.

Perfect Couples (8:30 p.m., NBC10) - Three couples seek the secret to an ideal relationship in this new sitcom.

Royal Pains (9 p.m., USA) - Hank and Evan gain insights into their father's complicated past when he suffers a heart attack.

Fairly Legal (10 p.m., USA) - Sarah Shahi stars in this lighthearted new drama as a former lawyer who now works as a mediator, helping people resolve their differences without the contentiousness of full legal proceedings.

The Daily Show With Jon Stewart (11 p.m., COM) - Kambiz Hosseini and Saman Arbabi of the satirical news show Parazit on the Voice of America.

Conan (11 p.m., TBS) - Marc Maron; Aloe Blacc performs.

The Colbert Report (11:30 p.m., COM) - Hardball host Chris Matthews.

Late Show With David Letterman (11:35 p.m., CBS3) - Kaley Cuoco; Piers Morgan; Wanda Jackson; Jack White.

The Tonight Show With Jay Leno (11:35 p.m., NBC10) - Actor Ben Affleck; the Decemberists perform.

Lopez Tonight (Midnight, TBS) - Ice skater Johnny Weir; My Chemical Romance.

Jimmy Kimmel Live (12:06 a.m., 6ABC) - Ryan Gosling; Kourtney and Kim Kardashian; Mario Batali; Ra Ra Riot.

The Late Late Show With Craig Ferguson (12:37 a.m., CBS3) - Actress Maria Bello; biologist Dan Riskin.

Late Night With Jimmy Fallon (12:37 a.m., NBC10) - Ashton Kutcher; Fred Armisen; Dismemberment Plan.