Neolution is back to make Sarah's Orphan Black life a living nightmare.

The BBC America series closed out season 3 with the mind-blowing reveal that Neolution is the real organization behind both Project Castor and Project Leda. Now, Susan Duncan's "directed evolution" endeavor will open season 4 by launching an attack Sarah Manning (Tatiana Maslany).

Check out what's in store for the premiere"

"After two months of respite, Sarah's hard-won refuge in Iceland is shattered by a Neolution attack," the network teased. "Once again forced to flee, she realizes no matter how far her family runs it will never be far enough."

Unfortunately for the sestras, the scientists won't be easily thwarted. As episode 2 begins, Sarah will uncover the organization's next move. Remember that robotic eye Rachel (Maslany) was sporting last season? Well, the rest of the Leda clones should expect similar "upgrades."

"She follows breadcrumbs and uncovers the next facet of Neolution's agenda - implanting dangerous technological devices in humans," BBC America teased.

While full scope of Neolution's plans have yet to be revealed, series co-creator John Fawcett promises the details will definitely start to come together this spring.

"It was important to us in this finale that there are a lot of answers and there is resolution and there is the feeling of a finale, but we also are at the brink of almost a brand new rabbit hole," Fawcett told Entertainment Weekly. "It's interesting to come to the end of our Castor mystery, and how that fits in with Leda and Topside and then to introduce our new foes that we're expecting to see more of in season 4, which is Neolution, which we set-up in season 1."

Are you excited for this new twist? Find out more when Orphan Black returns to BBC America on April 14. Check out a season 4 preview below!