Max and Caroline decide to hire an intern to help take care of some of the menial tasks involved with the preparation for opening their new cupcake shop, but Max seems conflicted with her new managerial role as the boss

The Jeffersonian team investigates the death of a young boy whose soul remains very much alive. When psychic Avalon Harmonia attempts to help the deceased's spirit cross over, each member of the team begins to question his or her own beliefs about life after death.

When a bearded, rotund man in a red Santa suit with an ID reading Kris Kringle falls from the sky in Central Park, Castle and Beckett are on the hunt to find the person who killed Santa. But everything isn't holiday cheer, as they discover St. Nick may have been more naughty than nice. Meanwhile, Castle and Beckett prepare for their first Christmas together.

Robert Plant, Jimmy Page and John Paul Jones from Led Zeppelin, honorees at "The 35th Annual Kennedy Center Honors"; from "The Office," actor John Krasinski; musical guest Paloma Faith

The house is decorated, the guests have arrived and it seems like it's the season to save Christmas when the gang finds themselves faced with the task of destroying a present for Santa that has the potential to destroy them and the holiday.

The Report hosts Hobbit Week, safer streets weaken a Republican wedge issue, medical grade sheds replace nursing homes, and Sir Ian McKellen prefers Gandalf the Grey.

From "Family Guy", "American Dad" and "The Cleveland Show", (co-)creator Seth MacFarlane; Victoria's Secret model Miranda Kerr; Richie Sambora as The Late Late Show House Band.

The six remaining artists perform, with a trip to the quarterfinals hanging in the balance.