Plot summary
Paul blackmails Olivier into telling Leekie that there was only one clone who attacked, Helena. Leekie tells Paul he has a new job for him, then arranges for Olivier to be killed. Delphine tells Leekie that Cosima made a pass at her, and he presses her to find out how many clones Cosima has had contact with. Cosima and Delphine sleep together. Delphine then searches the apartment, finding the clones' names and informing Leekie, but neglecting to mention Kira. Art goes to the morgue to check "Sarah's" body, and this leads him to Felix.
He questions Felix and realizes it was he who made the anonymous call with information about Beth. Alison takes revenge on Aynsley, whom she suspects of being her monitor, by having sex with her husband, Chad. Aynsley finds out and confronts her, and they fight. Sarah introduces Alison to Mrs. S and tells her about the clones. While they are talking, Kira opens the front door to Helena and follows her out. Kira speaks kindly to Helena, who lets her go, but, hearing her mother call, Kira runs into the street and is hit by a car.
Credits
Adapted from Wikipedia contributors, List of Orphan Black episodes. HTML formatting and reference markers removed.