Castle 2009 | TV Show Watchlist

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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

Rating: TV-PG

User Rating:4.75 out of 5 (5,834 ratings)

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Season 4, Episode 16 Linchpin

First Aired: February 20, 2012

Conclusion. Castle and Beckett try to stop a series of events that could lead the U.S. into a war, and their efforts continue to put Castle in CIA agent Sophia Conrad's orbit.

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Guest Cast

Josh Stamberg Martin Danberg
Jennifer Beals Sophia Conrad