How I Met Your Mother (8pm, CBS) - Robin contemplates one last fling with Barney and devises a scheme to entice him into an encounter.
Bones (8pm, Fox) - A psychic joins the investigation of the death of a little boy whose soul is believed to be still alive.
Rod Stewart: Merry Christmas, Baby (8pm, UNC-TV) - A holiday celebration with Rod Stewart, who duets with Michael Buble, Mary J. Blige, Cee-Lo Green and others.
Blake Shelton's No-So-Family Christmas (10pm, NBC) - It's all Blake Shelton all the time tonight on NBC. In this holiday variety special (which follows a 2-hour "The Voice"), Blake (right) performs holiday classics, new music, and comedy bits. Guest stars include Christina Aguilera, Kelly Clarkson, Miranda Lambert, Jay Leno, Larry the Cable Guy and Reba McEntire.
Castle (10pm, ABC) - A man resembling Santa Claus is found dead in Central Park, and Castle and Beckett discover some unsavory things about him as they investigate his murder. Meanwhile, Castle and Beckett prepare to celebrate their first Christmas as a couple.
Hawaii Five-0 (10pm, CBS) - Max and a cute bank teller he's attracted to are put in harm's way during botched bank robbery. The investigation reveals that the thieves had unexpected motives for attempting the heist. Meanwhile, Danny protects a model from a stalker.