Sarah reluctantly returns home from hiding to track down an elusive potential ally with ties to Beth Childs, and is drawn into a mystery that threatens to pull her and her sisters apart.
The clone sisters must rely on one another to survive from the new threat of Project Castor, who are searching for an original tissue sample to solve a genetic flaw. Alison decides to run for the local school board.
Desperately searching for her daughter, Sarah and her clone sisters face a new challenge when they learn that one of their own is one of the orchestrators of the Neolution project.
A young woman's life changes dramatically after she assumes the life of a dead woman who looked exactly like her, and discovers that they are both clones.
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IN PRODUCTION. The fifth and final season of Orphan Black premieres Saturday, June 10 (10/9c) on BBC America and Canada's SPACE, with 10 episodes.
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