Castle 4x21 Headhunters

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4.48/5 (21 votes)

First Aired: Apr. 16, 2012 on ABC

Summary: Castle takes on Detective Ethan Slaughter (Adam Baldwin) as his partner when the tension between himself and Beckett rises, and is shown a new side to police work that puts him in danger.

Main Characters in this Episode

Guest Stars

Kate Beckett	played by Stana Katic
Javier Esposito	played by Jon Huertas
Kevin Ryan	played by Seamus Dever
Lanie Parish	played by Tamala Jones
Det. Ethan Slaughter	played by Adam Baldwin
Dr. Carter Burke	played by Michael Dorn
Brian Reilly	played by Michael McGrady
Cesar Vales	played by Reynaldo Gallegos

Episode Quotes

Detective Ethan Slaughter: [as they are about to enter a bar, looking for a suspect] You packin'?
Richard Castle: Packing? No; I'm not a cop. My vest says 'Writer' on it
Detective Ethan Slaughter: [hands Castle his ankle gun] Rule number 3: You ride with me, you ride strapped. C'mon
Richard Castle: Hey... hey. What about regulations?
Detective Ethan Slaughter: You signed a waiver, didn't ya?... OK, you take the front; I'll go in the back
Richard Castle: Whoawhoawhoawhoawhoa. Shouldn't we call for backup?
Detective Ethan Slaughter: You got a skirt says 'Writer' on it, too?

Trivia

Nathan Fillion and Adam Baldwin are reunited in this episode. They previously worked together on Firefly, 10 years earlier. There have been many references to Firefly throughout the series.