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Castle - Season 4 - Casting News - Mark Pellegrino to Guest

Castle has enlisted Lost and Supernatural vet Mark Pellegrino to headline its upcoming 1940s-set film noir-themed episode, TVLine has learned exclusively.

Pellegrino will play Tom Dempsey, a ruthless club owner from 1947 who has it out for a private eye and his best girl (who Castle imagines as himself and Beckett) and whose shadowy dealings may be tied to a murder Castle and Beckett are investigating in the present day.

Source: TV Line