The Ellen DeGeneres Show
(3 p.m., NBC10) - Country singer John Rich.
The Big Bang Theory (8 p.m., CBS3) - Amy dumps Sheldon despite not being officially his girlfriend.
So You Think You Can Dance (8 p.m., Fox29) - Mary Murphy is back on the judges panel with Nigel Lythgoe.
The Vampire Diaries (8 p.m., CW57) - Elena discovers the fates of Uncle John and Jeremy.
Rules of Engagement (8:30 p.m., CBS3) - When Russell's mother cuts off his trust fund, he moves in with Timmy.
CSI: Crime Scene Investigation (9 p.m., CBS3) - Justin Bieber makes his acting debut, playing a troubled teen.
Nikita (9 p.m., CW57) - A former spy and assassin seeks retribution against a secret U.S. agency.
The Mentalist (10 p.m., CBS3) - Someone is murdered and someone else goes missing on the estate of a wealthy family.
The Daily Show With Jon Stewart (11 p.m., COM) - Author Jon Ronson.
Conan (11 p.m., TBS) - Dana Carvey; Mike Zohn and Evan Michelson.
The Colbert Report (11:31 p.m., COM) - Filmmaker Alison Klayman.
Late Show With David Letterman (11:35 p.m., CBS3) - Ray Romano; Arctic Monkeys.
The Tonight Show With Jay Leno (11:35 p.m., NBC10) - Piers Morgan; Scott Weiland performs.
Jimmy Kimmel Live (Midnight, 6ABC) - Christina Aguilera; Mike Tyson; Big Sean.
Lopez Tonight (Midnight, TBS) - Comedian Russell Peters; singer Ja Rule.
The Late Late Show With Craig Ferguson (12:37 a.m., CBS3) - Seth Green; magician Lance Burton.