In an episode slated for spring, Adam Baldwin, who played Firefly's Jayne Cobb to Nathan's Capt. Malcolm 'Mal' Reynolds, will guest star as a detective named Ethan Slaughter. (How's that for a character name?)
Slaughter is described to me as a rough and tumble cop from the city's gang unit who lands a case that Castle is desperate to follow. Along the way, Slaughter shows Castle a dirtier side of police work that forces Castle to reconsider what he's willing to do to close a case. As the season nears its cliffhanging conclusion, expect this new alliance to place Castle in the line of fire like never before.
Read more at TV Guide
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