Castle - Season 4 Episode 21 Headhunters
8.01/10 by 1819 users
With tensions rising between Castle and Beckett, Castle finds himself a new partner -- Detective Ethan Slaughter (guest star Adam Baldwin, "Firefly"), 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
- Title: Castle
- Year: 2016
- Genre: Drama, Crime
- Country: United States of America
- Studio: ABC
- Director: Andrew W. Marlowe
- Cast: Nathan Fillion, Stana Katic, Molly C. Quinn, Jon Huertas, Seamus Dever, Susan Sullivan
- Crew: Zach Cannon (Script Coordinator), Mark S. Glick (Co-Producer), Terence Paul Winter (Executive Producer), Alexi Hawley (Executive Producer), Barry O'Brien (Consulting Producer), Nathan Fillion (Producer)
- Keyword: new york city, police, writer, novelist, criminal investigation, female detective, homicide detective, criminal consultant, police procedural
- Runtime: 45 minutes
- IMDb: 8.01 / 10 by 1819 users
- Popularity: 476.801
- First Air Date: Mar 09, 2009
- Last Air date: May 16, 2016
- Season: 8 Season
- Episode: 173 Episode
- Language: English
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