Bad Santa Castle : Season 7 Episode 10
TV-14 ABC 43m
Aired: December 8th, 2014 @ 9:00 PM EST on ABC
When an ER physician is gunned down in the street, Castle and Beckett soon discover that the victim was a mob doctor to a Mafia family run by an old friend of Castle's. Also, against this backdrop of Christmas, Esposito and Lanie reach a defining moment in their relationship.
