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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
First Air Date : Mar 09, 2009
Last Air date : May 16, 2016
Episode : 173 Episode
Season : 8 Season
Runtime: 26:14 minutes
Studio: ABC
Country: United States of America
