Castle: Headhunters

10:00pm – Monday, April 16 on CTV

With tensions rising between Castle (Nathan Fillion) and Beckett (Stana Katic), Castle finds himself a new partner – Detective Ethan Slaughter (guest star Adam Baldwin, Firefly), a tough and colourful cop from the city’s gang unit. Castle gets more than he bargained for though, 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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