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 - Season 4 Episode 21 Headhunters |
|---|---|
| Year | 2016 |
| Genre | Drama, Crime |
| Country | United States of America |
| Studio | ABC |
| Cast | Nathan Fillion, Stana Katic, Molly C. Quinn, Jon Huertas, Seamus Dever, Susan Sullivan |
| Crew | Zach Cannon (Script Coordinator), Mark S. Glick (Co-Producer), Barry O'Brien (Consulting Producer), Terence Paul Winter (Executive Producer), Alexi Hawley (Executive Producer), Stana Katic (Producer) |
| Alternative Titles | Castke, Κάστρο, کسل |
| Keyword | new york city, police, writer, novelist, criminal investigation, female detective, homicide detective, criminal consultant, police procedural |
| First Air Date | Mar 09, 2009 |
| Last Air date | May 16, 2016 |
| Season | 8 Season |
| Episode | 173 Episode |
| Runtime | 45:14 minutes |
| Quality | HD |
| IMDb: | 8.00/ 10 by 1,853.00 users |
| Popularity | 272.942 |
| Language | English |
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