CASTLE - "The Final Nail" -- Castle and Beckett find themselves on opposite sides of the case when Castle's old school friend (guest star Jason Wiles) emerges as the prime suspect in his own wife's murder. As they work to solve the crime, Castle comes to realize that one of two terrible things must be true... Either Detective Beckett is about to arrest an innocent man for murder, or his old friend is a cold-blooded killer, on "Castle," MONDAY, FEBRUARY 14 (10:01-11:00 p.m. ET) on the ABC Television Network.
Source: ABC
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