Castle 2009 | TV Show Watchlist

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A murder-mystery writer and a homicide detective team up to solve unusual crimes in New York City, and their professional relationship soon crosses the line into romance.

Premiered: March 9, 2009

Rating: TV-PG

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

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Season 4, Episode 21 Headhunters

First Aired: April 16, 2012

When things get tense with Beckett, Castle decides to team up with a new partner: a tough gang-unit detective who exposes him to a seedier side of police business and puts him in risky situations.

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Guest Cast

Michael Dorn Dr. Carter Burke
Michael McGrady Brian Reilly
Adam Baldwin Det. Ethan Slaughter