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Orphan Black, the Canadian science fiction show that revolves around human cloning, will end on Saturday, August 12th after five darkly funny, gory seasons. The show began with a former British street urchin, Sarah Manning (Tatiana Maslany), watching as someone with her exact facial features commits suicide by jumping in front of a train. From there, the show unravels to be about large biotech corporations, conspiracies, and above all, morally questionable science.

Spoilers ahead for all of Orphan Black except the finale.

Science classes teach students early on that human experimentation is ethically wrong if the subjects don’t know they’re being experimented on, or exactly what the experiment entails. Orphan Black explores this taboo by…

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