Emmy-nominated Tatiana Maslany returns for the exhilarating fourth season of Orphan Black. With the threat of the Castor clones no longer plaguing them, the sisterhood's future looks bright. That is, until the past comes crashing back into their lives with the introduction of Neolution the organization that has been pulling the strings all along. Forced to emerge from her Icelandic safe house, Sarah is lead down a dangerous path back to the clone that started it all: Beth Childs. As Sarah begins to crack under the overwhelming pressure of keeping her family safe, the sisters are pushed in disparate directions. But in order to survive, they will need to band together like never before, or be torn apart forever.