Castle
Season 4 Episode 14 - 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.
Episodes in Season 4
Rise
44 min
Heroes & Villains
44 min
Head Case
44 min
Kick the Ballistics
44 min
Eye of the Beholder
44 min
Demons
44 min
Cops & Robbers
44 min
Heartbreak Hotel
44 min
Kill Shot
44 min
Cuffed
44 min
Till Death Do Us Part
44 min
Dial M for Mayor
44 min
An Embarrassment of Bitches
44 min
The Blue Butterfly
44 min
Pandora (1)
43 min
Linchpin (2)
44 min
Once Upon a Crime
44 min
A Dance with Death
44 min
47 Seconds
44 min
The Limey
44 min
Headhunters
44 min
Undead Again
44 min
Always
44 min