Sarah pursues Helena, who is being held in a compound far away; Sarah must deter a Topside investigator.
The war with Dyad is all but lost when Rachel’s latest ploy forces a broken Sarah to concede. The Clone Club springs into action, uniting in a reckless gambit to save Sarah. As they fight to gain their freedom, Sarah encounters a new ally and uncovers a terrifying new dimension to the conspiracy.
Castor pursues the clones in order to obtain original tissue samples; Helena is examined by a new villain.
Leda and Castor hunt for the original clone DNA; Mark and Gracie pursue new leads; Art and Sarah reunite.
Rachel bargains for her freedom with decoding Duncan's Moreau book; Sarah must pursue the Original Castor.
