Bones is giving its fans double the Deschanel for Christmas.

(500) Days of Summer star Zooey Deschanel will join her big sister Emily on the Dec. 10 episode of the FOX series. The episode will mark the first time Emily and Zooey have appeared together on screen.

Emily Deschanel and Bones creator Hart Hanson said at the start of the season that they wanted to have Zooey on the show but weren’t sure if her schedule would allow it. That has obviously worked out now.

In the episode, which has the very Bones-ian title The Goop on the Girl, Zooey will play Margaret Whitesell, a distant relative of her sister’s character, Temperence Brennan. Brennan’s dad (a returning Ryan O’Neal) comes into contact with Margaret and asks her to spend Christmas with him and Brennan.

The Goop part of the title comes from the case of the week, which has Brennan and Booth (David Boreanaz) investigating the death of a man in a Santa Claus suit who was blown up in a bank robbery gone wrong.

Source: Zap2It