Summary: 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 (guest star Cara Buono, “Mad Men”). 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.
Writer: Terrence Paul Winter, Director: Rob Hardy
- Juliana Dever – Jenny Ryan
- Cara Buono – Siobhan O’Doul
- Brian Letscher – Liam Finch
- Christina Cox – Maggie Finch
- Michael Rodrick – Robert “Bobby S” Shannon