BBC America has released a sneak peek at the first four minutes of the “Orphan Black” Season 4 premiere, which has some surprises in store for fans of the sci-fi thiller.

Season 4 of “Orphan Black” premieres Thursday, April 14 at 10 p.m. on the cable network, followed by a new weekly aftershow, titled “After the Black,” which will dissect the episodes and feature cast, crew and special guest appearances.

In a season where the sisters will have to go back to the beginning, fans will find the clones, and those who love them, as clueless about their fate as we first met them in Season 1. They now know what they are, who created them, and who was trying to destroy them; but what if everything they thought they knew, was a misdirect? What if they were sent down the wrong rabbit hole? What if they missed a crucial chapter of the mystery? When Sarah (Tatiana Maslany) returns home from her Icelandic hideout to track down an elusive new clone tied to Beth (Maslany), she and her sisters will band together to uncover the truth, no matter who they have to hurt in the process.

The new season will delve further into Beth’s backstory to uncover what led her to that fateful night on the train tracks when Sarah’s world changed forever.

“We wanted to get that feel of Season 1 back; you don’t know who the bad guy is,” co-creator John Fawcett said during the show’s panel at WonderCon.

Star Jordan Gavaris compared Season 4 to “a very fast train going towards a very scary tunnel,” and offered an ominous tease for the potential threats of the new season: “I think it’s worth saying that we know who Dyad is… [but] Neolution isn’t a company, it’s a concept – they’re everywhere and nowhere.”