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The Blue Butterfly

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.
Aired: Feb 06, 2012 Genre: Drama CrimeCasts: Nathan Fillion Stana Katic Molly C. Quinn Jon Huertas Seamus Dever Susan Sullivan Tamala Jones Penny Johnson JeraldCreated By: Andrew W. MarloweProducers: Chuck Bowman Terence Paul WinterDuration: 45m Rating: 3.9 Country: United States of America Production: Beacon Pictures, Experimental Pictures, ABC Studios