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 |
|---|---|
| Alternative Titles | Касъл, Castke, Κάστρο, کسل |
| Subtitle Available |
 ETC.
|
| First Air Date | 2009-03-09 |
| Last Air Date | 2016-05-16 |
| Number of Episodes | 173 |
| Number of Seasons | 8 |
| Genres | Drama, Crime, |
| Networks | ABC, |
| Casts | Nathan Fillion, Stana Katic, Molly C. Quinn, Jon Huertas, Seamus Dever, Susan Sullivan, Tamala Jones, Toks Olagundoye |
| Plot Keywords | , |
Episodes List
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Castle Season 4 :Episode 1 Rise Rise
2011-09-19After a serial killer imitates the plots of his novels, successful mystery novelist Richard "Rick" Castle receives permission from the Mayor of New...
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Castle Season 4 :Episode 2 Heroes & Villains Heroes & Villains
2011-09-26After a serial killer imitates the plots of his novels, successful mystery novelist Richard "Rick" Castle receives permission from the Mayor of New...
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Castle Season 4 :Episode 3 Head Case Head Case
2011-10-03After a serial killer imitates the plots of his novels, successful mystery novelist Richard "Rick" Castle receives permission from the Mayor of New...
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Castle Season 4 :Episode 4 Kick the Ballistics Kick the Ballistics
2011-10-10After a serial killer imitates the plots of his novels, successful mystery novelist Richard "Rick" Castle receives permission from the Mayor of New...
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Castle Season 4 :Episode 5 Eye of the Beholder Eye of the Beholder
2011-10-17After a serial killer imitates the plots of his novels, successful mystery novelist Richard "Rick" Castle receives permission from the Mayor of New...
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Castle Season 4 :Episode 6 Demons Demons
2011-10-24After a serial killer imitates the plots of his novels, successful mystery novelist Richard "Rick" Castle receives permission from the Mayor of New...
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Castle Season 4 :Episode 7 Cops & Robbers Cops & Robbers
2011-10-31After a serial killer imitates the plots of his novels, successful mystery novelist Richard "Rick" Castle receives permission from the Mayor of New...
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Castle Season 4 :Episode 8 Heartbreak Hotel Heartbreak Hotel
2011-11-07After a serial killer imitates the plots of his novels, successful mystery novelist Richard "Rick" Castle receives permission from the Mayor of New...
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Castle Season 4 :Episode 9 Kill Shot Kill Shot
2011-11-21After a serial killer imitates the plots of his novels, successful mystery novelist Richard "Rick" Castle receives permission from the Mayor of New...
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Castle Season 4 :Episode 10 Cuffed Cuffed
2011-12-05After a serial killer imitates the plots of his novels, successful mystery novelist Richard "Rick" Castle receives permission from the Mayor of New...
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Castle Season 4 :Episode 11 Till Death Do Us Part Till Death Do Us Part
2012-01-09After a serial killer imitates the plots of his novels, successful mystery novelist Richard "Rick" Castle receives permission from the Mayor of New...
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Castle Season 4 :Episode 12 Dial M for Mayor Dial M for Mayor
2012-01-16After a serial killer imitates the plots of his novels, successful mystery novelist Richard "Rick" Castle receives permission from the Mayor of New...
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Castle Season 4 :Episode 13 An Embarrassment of Bitches An Embarrassment of Bitches
2012-01-23After a serial killer imitates the plots of his novels, successful mystery novelist Richard "Rick" Castle receives permission from the Mayor of New...
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Castle Season 4 :Episode 14 The Blue Butterfly The Blue Butterfly
2012-02-06After a serial killer imitates the plots of his novels, successful mystery novelist Richard "Rick" Castle receives permission from the Mayor of New...
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Castle Season 4 :Episode 15 Pandora (1) Pandora (1)
2012-02-13After a serial killer imitates the plots of his novels, successful mystery novelist Richard "Rick" Castle receives permission from the Mayor of New...
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Castle Season 4 :Episode 16 Linchpin (2) Linchpin (2)
2012-02-20After a serial killer imitates the plots of his novels, successful mystery novelist Richard "Rick" Castle receives permission from the Mayor of New...
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Castle Season 4 :Episode 17 Once Upon a Crime Once Upon a Crime
2012-02-27After a serial killer imitates the plots of his novels, successful mystery novelist Richard "Rick" Castle receives permission from the Mayor of New...
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Castle Season 4 :Episode 18 A Dance with Death A Dance with Death
2012-03-19After a serial killer imitates the plots of his novels, successful mystery novelist Richard "Rick" Castle receives permission from the Mayor of New...
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Castle Season 4 :Episode 19 47 Seconds 47 Seconds
2012-03-26After a serial killer imitates the plots of his novels, successful mystery novelist Richard "Rick" Castle receives permission from the Mayor of New...
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Castle Season 4 :Episode 20 The Limey The Limey
2012-04-02After a serial killer imitates the plots of his novels, successful mystery novelist Richard "Rick" Castle receives permission from the Mayor of New...
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Castle Season 4 :Episode 21 Headhunters Headhunters
2012-04-16After a serial killer imitates the plots of his novels, successful mystery novelist Richard "Rick" Castle receives permission from the Mayor of New...
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Castle Season 4 :Episode 22 Undead Again Undead Again
2012-04-30After a serial killer imitates the plots of his novels, successful mystery novelist Richard "Rick" Castle receives permission from the Mayor of New...
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Castle Season 4 :Episode 23 Always Always
2012-05-07After a serial killer imitates the plots of his novels, successful mystery novelist Richard "Rick" Castle receives permission from the Mayor of New...
