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When a man is found dead in an industrial cake mixer, Castle and Beckett trace the murder to an Irish gang in Staten Island and a beautiful bar owner named Siobhan O’Doul. Much to everyone’s surprise, Detective Ryan has a complicated history with Siobhan and the Staten Island crime family from his days working undercover in narcotics. When the case hits a dead end, Ryan must go back undercover to expose the killer, complicating his relationship with his wife.
First Air Date : Mar 09, 2009
Last Air date : May 16, 2016
Episode : 173 Episode
Season : 8 Season
Runtime: 45:14 minutes
Studio: ABC
Country: United States of America