Original Air Date:  Apr 16, 2012

Writer: Alexi Hawley

Director: John Terlesky

Summary: With tensions rising between Castle and Beckett, Castle finds himself a new partner — Detective Ethan Slaughter (Adam Baldwin), a tough and colorful cop from the city’s gang unit. But Castle gets more than he bargained for when Slaughter shows him a grittier side of police work that puts Castle in the line of fire like never before.

Discussion: Episode 21 Discussion

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Executive Producers

• Andrew W. Marlowe
• Rob Bowman
• Laurie Zaks
• Armyan Bernstein
• David Amann

Main Cast

• Nathan Fillion – Rick Castle
• Stana Katic -Detective Kate Beckett
• Jon Huertas – Detective Javier Esposito
• Seamus Dever – Detective Kevin Ryan
• Molly C. Quinn – Alexis Castle
• Susan Sullivan – Martha Rodgers
• Tamala Jones – Lanie Parish
• Penny Johnson Jerald – Captain Victoria Gates

Guest Cast

• Adam Baldwin – Ethan Slaughter
• Michael Dorn – Dr Bourke
• Michael McGrady – Brian Reilly

Episode Images