Lauren Hammersley

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.

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.

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

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

A devastating loss is suffered; Sarah learns that Helena has been kidnapped; Clone Club bands together to find Helena before her babies are born.