AceShowbiz -

"Orphan Black" has just returned with its fourth season. The first episode that aired on Thursday, April 14 took us back to the beginning of all, addressing what led Beth Childs to kill herself and bringing back some fallen characters such as Olivier, Paul and Dr. Leekie.

The said outing also introduced a new clone, M.K., who had been teased in many promos for the season, and another new face, Detective Duko. Next week, Sarah tries to find out more about her mysterious clone sister. Also in the sneak peek for the upcoming outing, Mrs. S sets a house on fire and warns someone about what could happen in a war.

"Transgressive Border Crossing" airs Thursday, April 21 at 10/9c on BBC America.

In an interview with EW, series creators John Fawcett and Graeme Manson talk about Detective Duko, who appears to have connection with Neolutionists. "He's clearly running his own agenda. He's got things going on the side. He's not on the up and up, clearly, and more will be revealed," Fawcett teases. He adds, "It's interesting, though, that Neolution has gotten its hooks into the police department as well. It's kind of setting up this thing that you don't who the foe is."