Headhunters (S04E21)
S04E21
As tensions escalate between Castle and Beckett, Castle teams up with a new partner—Detective Ethan Slaughter, portrayed by Adam Baldwin. Slaughter is a rough-edged, vibrant officer from the gang unit, and he introduces Castle to a harsher reality of police work. This new experience thrusts Castle into dangerous situations, challenging him in ways he never anticipated.
Show
Castle
Episode
S04E21
Air Date
Apr 16, 2012
Season 4 Episodes
S04E01
Rise
S04E02
Heroes & Villains
S04E03
Head Case
S04E04
Kick the Ballistics
S04E05
Eye of the Beholder
S04E06
Demons
S04E07
Cops & Robbers
S04E08
Heartbreak Hotel
S04E09
Kill Shot
S04E10
Cuffed
S04E11
Till Death Do Us Part
S04E12
Dial M for Mayor
S04E13
An Embarrassment of Bitches
S04E14
The Blue Butterfly
S04E15
Pandora (1)
S04E16
Linchpin (2)
S04E17
Once Upon a Crime
S04E18
A Dance with Death
S04E19
47 Seconds
S04E20
The Limey
S04E21
Headhunters
S04E22
Undead Again
S04E23
Always