Plot summary
Delphine returns to the island but refuses to tell Cosima about the endgame plan and they accept the flaws in their relationship. Westmorland injects Rachel with the cure. Cosima realizes the man in the woods, Yanis, has a healing factor. At a dinner party held by Westmorland, Susan admits to trying to give it to the clones but it ended up passing to Kira. Westmorland's plan is to have Kira's eggs harvested to 1300 surrogates to control the healing factor. Ira begins glitching. Cosima is able to glean Westmorland's immortality is a lie and that's why he really wants to use Kira.
Westmorland kills Yanis and locks Cosima in his cage. Meanwhile, Sarah offers to be more honest with Kira if she explains more about her link to the Leda clones; Kira wants to be a hustler like her mother. Delphine heads for Switzerland, but warns Siobhan that Kira is running out of time.
Credits
Adapted from Wikipedia contributors, List of Orphan Black episodes. HTML formatting and reference markers removed.