Rachel bargains for her freedom with decoding Duncan's Moreau book; Sarah must pursue the Original Castor.
Cast:
Tatiana Maslany
Dylan Bruce
Jordan Gavaris
Kevin Hanchard
Evelyne Brochu
Ari Millen
Kristian Bruun
Maria Doyle Kennedy
Ksenia Solo
Justin Chatwin
Tom McCamus
Zoé De Grand Maison
Josh Vokey
Kyra Harper
Tom Barnett
Rosemary Dunsmore
Michelle Arvizu