Lauren Hammersley

Sarah’s day off to reconnect with Kira quickly turns into a sleuthing mission aimed squarely at discrediting Felix’s new ties. Cosima steps up with Donnie to further investigate the Neolutionist fertility research center. While Donnie bumps into an all too familiar face, Cosima makes a shocking discovery that leads her into a dangerous encounter.

As Sarah scrambles to learn more about her implant, Alison and Donnie take a drastic step to help. Meanwhile, Kira has a disturbing vision.

Alison's loyalty to the clones is questioned; Cosima makes a final attempt to discover a cure.

Helena takes shelter behind enemy lines, and Sarah and Art struggle to protect her and end the siege.

Sarah and Rachel must come together for the greater good; Cosima and Susan disagree about the ethical implications of human experiments.

Mrs. S orders the sisters to celebrate Felix's art opening; Sarah remains on edge with a nagging suspicion that S is hiding something.