S4·E21 Headhunters
Narrative Classification: Standard continuity chapter maintaining character development and season progression.
Synopsis
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
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Frequently Asked Questions
When did Season 4 Episode 21 of Castle air?
Season 4, Episode 21 ('Headhunters') originally aired on April 16, 2012.
How long is Season 4 Episode 21 ('Headhunters')?
The episode follows the standard broadcast runtime for Castle.
What happens in Castle Season 4 Episode 21?
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 wor...
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