Castle senses a diary of a P.I from the 1940s found in the effects of a murdered modern-day treasure hunter is the key to finding the Blue Butterfly, a blue-diamond necklace. The team works out the story situated in 1947 in the same, now derelict, music club, involving murder, gangsters, and theft; they work out the true parts and identities of culprits and victims.
Episode rating
Cast of episode
77
18
3
1
1
- Richard Castle
- Kate Beckett
- Alexis Castle
- Kevin Ryan
- Lanie Parish
- Martha Rodgers
- Javier Esposito
- Captain Victoria Gates
- Tom Dempsey
- Jerry Maddox
- Viola Maddox
- Clyde Belasco
- Ray Horton
- West Side Wally
- Cindy Banks
- Leonard
- Luella McManus
- Frankie
- Bartender