Sarah must confront the conspiracy head-on; Paul learns the truth; Cosima, Delphine and Dr. Leekie grow closer.
Alison's paranoia puts the Orphans at risk; Sarah, Alison and Beth's worlds collide; Sarah must trust someone with her secret.
Sarah's actions set the Orphans against each other as she plans her next move. Paul tries desperately to hide Sarah's existence. Alison takes vengeance on her suspected monitor.