Castle
Bad Santa
S7 E10:
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.
Starring
Carole Gutierrez, Larry Poindexter, Vincent Spano