When are we going to get some more Castle-Beckett goodness on Castle? — Samantha
ADAM: After the winter break, you're definitely going to see the duo go at it — just not in the way you might want. When one of Castle's old friends from prep school is suspected in his wife's murder, Castle and Beckett's friendly partnership is put to the test. "Beckett is convinced that Castle's friend is guilty of this crime, and Castle, who's known this guy and really looked up to him, can't conceive that he was the murderer," creator Andrew W. Marlowe tells us. "We uncover some secrets about the guy's past and challenge Castle's point of view, but you get to see Beckett and Castle on completely opposite sides of an investigation."
Source: TV Guide