Orphan Black's Sarah Manning dove down the rabbit hole, and, if the season 4 finale title is any indication, her journey into the past will put the sestras in more danger than ever.

Neolution is breathing down the clones' identical necks, and the members of Project Leda have seven more episodes to get to the bottom of Beth's final day. A batch of new episode titles hint at what's in store for the back half of season 4.

Episode 4: "From Instinct to Rational Control"

Episode 5: "Human Raw Material"

Episode 6: "The Scandal of Altruism"

Episode 7: "The Antisocialism of Sex"

Episode 8: "The Redesign of Natural Objects"

Episode 9: "The Mitigation of Competition"

Episode 10: "From Dancing Mice to Psychopaths"

Well, seeing the word "psychopath" in a finale title is never a good sign, that's for sure. While fans wait for the seasons undoubtedly explosive closer, Sarah will dive further into the MK mystery in this Thursday's "From Instinct to Rational Control" (see a preview below).

"Well, the thing that is exciting to us about next week is that we get a real re-dosing of M.K., and she comes back in a big way and we get to find out some of M.K.'s deep secrets," executive producer John Fawcett teased, according to Entertainment Weekly.

This in no way means that the investigation into Neolution's transhumanism agenda will fall by the wayside. Episode 4 will "to dig deeper into [the] bot mystery," executive producer Graeme Manson informed the site.

"Sarah realizes her goals have aligned with her once enemy and forms a precarious alliance in hopes of getting to the head of Neolution. Meanwhile, on her end, Alison dispatches Felix and Donnie to infiltrate a Neolution fertility clinic that Beth investigated," BBC America teased. "Back at the lab, Cosima and Scott receive a revolting delivery from Alison. As Rachel grows closer to Charlotte, Susan Duncan leaves a devastating decision in her hands."

Find out more when Orphan Black airs Thursdays at 10 p.m. ET on BBC America.