When Castle and Beckett investigate the killing of a treasure hunter, they discover the case is linked to a mysterious homicide from 1947 involving a hard-boiled private detective. Castle realizes the only way to solve the present-day murder is to solve the murder from the past. The 1947 case comes to life through stylized flashbacks, featuring Castle as the private eye and Beckett as a femme fatale.
Air date: February 6, 2012 / Directed by Chuck Bowman / Written by Terence Paul Winter
Guest Cast: Mark Pellegrino as Tom Dempsey, Patrick Cassidy as Clyde Belasco, Chad Everett as Jerry Maddox, Ellen Geer as Viola Maddox, Darin Toonder as Frankie.