Castle2009 | TV Show

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A murder-mystery writer and a detective team up to catch a serial killer who is reenacting murders from his books. Once the case is solved, the unlikely pair continue to work together to probe New York City's most unusual homicides.

Premiered: March 9, 2009

Rating: TV-PG

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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.

Previous Episode

Pandora

Season 4, Episode 15

February 13, 2012

Next Episode

Once Upon a Crime

Season 4, Episode 17

February 27, 2012

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