On Orphan Black Season 4 Episode 4, Sarah reluctantly joins forces with Ferdinand in an effort to get the Neolution implant out of her jaw.
Well, thanks to Cosima and Scott, we now (apparently) know what that squiggly little maggot bot does – changes DNA! Not horrifying at all.
Orphan Black Season 4 Episode 4 revealed much to its audience, both about the mysterious MK's motives and backstory, and the larger "Big Bad" of Orphan Black Season 4. It also delved into Ferdinand's motives, following his surprise return at the end of Orphan Black Season 4 Episode 3.