Castle (2009) Season 4 Episode 21 - Headhunters

Airdate: 2012-Apr-16

Episode summary:

With tensions rising between Castle and Beckett, Castle finds himself a new partner -- Detective Ethan Slaughter, 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.

About Castle (2009) series:

Castle is an American comedy series that features the life of the mystery novelist, Richard Castle who has a writer’s block and became involv...Show more >