Evelyne Brochu

Even as Sarah searches for answers, Allison's paranoia becomes an urgent concern for the Orphans. Sarah has to decide who to entrust with her secret after the separate worlds of Sarah, Alison and Beth collide.

The Orphans are pitted against each other as Sarah plans what to do next. Meanwhile, Paul does his best to conceal Sarah's existence, and Alison's retaliation on who she suspects is her monitor could come at a high price.

Dr Leekie gives Sarah pause for thought about seeking revenge after Kira's life is threatened, Cosima must choose sides when she realises the truth about Delphine, and the truth about where Sarah came from changes everything.

Paul goes missing, which compels Sarah to tackle the conspiracy herself. The fragile trust between Paul and Sarah is ready to disintegrate when Paul finds out Sarah has kept information from him, and Cosima is drawn closer to Delphine and Dr Leekie.

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