LAST WEEK'S REVIEW: 'Orphan Black' Season 4, Episode 3, 'The Stigma of Process': Going Fishing Cloning Around As the episodes progress, it's obvious Sarah is willing to do anything to get the gross cheek worm removed, even if it means teaming up with Ferdinand in order to access Susan Duncan. And so the clone set out yet again to get answers from the mysterious M.K., who has learned to trust only herself over the years.