As Alison is terrified by Neolution threats made against Donnie, Sarah and Mrs. S question her loyalty to her sisters. While Sarah is distracted, Siobhan sneaks out to seek vengeance. Meanwhile, Cosima and Susan Duncan work together in a final attempt to discover a cure.
Genres: Drama , Sci-Fi & Fantasy
Keywords: clone , eugenics , experiment , genetic-enhancement , identity-swap , sibling-relationship , tv-shows-online