Complete story — includes the ending
Sarah and Art continue looking for the killer, while Sarah tries to cover up that both killer and victim are her sister clones. The police believe that the killer is a fundamentalist Christian, while Cosima deduces that the group Helena is affiliated with believes the clones are abominations and must be killed. Helena keeps a close eye on Sarah and the case, putting Sarah's cover in jeopardy. Mrs. S allows her to visit Kira, but because Sarah is busy on the case, Felix asks Alison to impersonate Sarah - otherwise Mrs. S would never allow her to see Kira again. Alison is taken aback when Kira instantly knows she is not Sarah. Helena lures Sarah to Maggie Chen's apartment, where it is revealed that Maggie worked for the same group as Helena: Beth had killed Maggie to protect the clones. Sarah allows Helena to escape before Art arrives, and later quits the police force. Helena collapses and is picked up by a man wearing the same symbol as her and Maggie.
Sources and content license
Source and revision history · Adapted from Wikipedia contributors, List of Orphan Black episodes. HTML formatting and reference markers removed. · Content license