Cosima takes a bad turn; Sarah takes action with tragic consequences; the Proletheans set their plan in motion; Alison and Donnie have a run-in with the law.
Cast:
Tatiana Maslany
Dylan Bruce
Jordan Gavaris
Kevin Hanchard
Evelyne Brochu
Maria Doyle Kennedy
Michael Mando
Michelle Forbes
Peter Outerbridge
Kristian Bruun
Inga Cadranel
Josh Vokey
Julian Richings
Ari Millen