NGTV Guide: Monday, December 7

Is it the Ghost of Christmas Past on Gossip Girl? Will there be a Christmas miracle on Castle? Tune in!

Gossip Girl – the CW 9/8c
“The Debarted” – A year after his father’s death, Chuck deals with an issue from the past, and another car accident occurs on the Upper East side. Meanwhile, Dan and Vanessa face the new complexities in their friendship; and Jenny gets accused of assaulting a classmate.

Castle – ABC 10/9c
“The Fifth Bullet” – When an art dealer is gunned down in his gallery, Castle & Beckett discover that a bullet is inexplicably missing from the crime scene. The mystery is deepened by an amnesiac who witnessed the crime but can’t remember what he saw or even who he is…