Castle
Season 4 Episode 21 - Headhunters
8.0 ?
2009
Drama, Crime
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
Episodes in Season 4
1
Rise
44 min
2
Heroes & Villains
44 min
3
Head Case
44 min
4
Kick the Ballistics
44 min
5
Eye of the Beholder
44 min
6
Demons
44 min
7
Cops & Robbers
44 min
8
Heartbreak Hotel
44 min
9
Kill Shot
44 min
10
Cuffed
44 min
11
Till Death Do Us Part
44 min
12
Dial M for Mayor
44 min
13
An Embarrassment of Bitches
44 min
14
The Blue Butterfly
44 min
15
Pandora (1)
43 min
16
Linchpin (2)
44 min
17
Once Upon a Crime
44 min
18
A Dance with Death
44 min
19
47 Seconds
44 min
20
The Limey
44 min
21
Headhunters
44 min
NOW PLAYING
22
Undead Again
44 min
23
Always
44 min
