Successful mystery novelist Richard Castle starts working with the New York Police Department (NYPD) homicide investigation team after a serial killer decides to use plots from his novels for no good.
Premiered: March 9, 2009
Season 3, Episode 3 Under the Gun
First Aired: October 4, 2010
Encoded evidence sparks Castle's imagination during the investigation into a bail bondsman's murder, but Beckett dismisses his wild theories. Meanwhile, Beckett's reunion with her ex-partner turns romantic, much to Castle's chagrin.
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