After Cosima takes a turn for the worse, Delphine comes to Sarah to ask about Kira donating bone marrow. Sarah is torn because she wants to help Cosima but doesn't want to risk Dyad taking her daughter. Lured back to the Proletheans by their promise of children, Helena earns an unlikely ally. Meanwhile, Alison and Donnie deal with the aftermath of Dr. Leekie's death.

We discuss the ninth episode of the second season of Orphan Black, "Things Which Have Never Yet Been Done."

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