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Castle - Episode 7.10 - Bad Santa - Synopsis

“Castle” – “Bad Santa” – 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. (10:00-11:00 p.m., ET).