The Ellen DeGeneres Show
(3 p.m., NBC10) - Justin Timberlake.
The Oprah Winfrey Show (4 p.m., 6ABC) - Josh Groban and Johnny Mathis.
Million Dollar Money Drop (8 p.m., Fox29) - Contestants get a million up front but must answer seven questions in order to keep it.
90210 (8 p.m., CW57) - Plagued by flashbacks to her rape, Naomi tries sleeping pills.
Rules of Engagement (8:30 p.m., CBS3) - Audrey contemplates quitting her job after realizing how miserable it makes her.
Castle (9 p.m., 6ABC) - A double bill of episodes begins with Castle and Beckett investigating what seems to be an assassination.
Gossip Girl (9 p.m., CW57) - Blair is definitely unpleasantly surprised by the presence of a certain someone at her birthday party.
The Closer (9 p.m., TNT) - The squad's holiday plans are jeopardized when a feud leads to a stabbing on Christmas Eve and the accidental death of a patriarch.
Hawaii Five-0 (10 p.m., CBS3) - A violent convict escapes from prison to recover some stolen money and kidnaps a young couple on vacation.
Men of a Certain Age (10 p.m., TNT) - Against all odds, Joe finds himself dating two women. Terry makes a bet with a fellow salesman.
The Daily Show With Jon Stewart (11 p.m., COM) - Comedian Ricky Gervais.
Conan (11 p.m., TBS) - Aaron Eckhart; Mary Lynn Rajskub; Beach House.
Late Show With David Letterman (11:35 p.m., CBS3) - Jack Black; Marv Albert.
The Tonight Show With Jay Leno (11:35 p.m., NBC10) - Larry King; Garrett Hedlund; Pink Martini.