BBC America has released the first trailer for the new season of Orphan Black.

The sci-fi conspiracy thriller returns in the US next month with ten new episodes.

> Buy Season 3 on DVD on Amazon.

The official synopsis reads: “Season 4 will see leader-of-the-pack, Sarah, reluctantly return home from her Icelandic hideout to track down an elusive and mysterious ally tied to the clone who started it all — Beth Childs.  Sarah will follow Beth’s footsteps into a dangerous relationship with a potent new enemy, heading in a horrifying new direction.

“Under constant pressure to protect the sisterhood and keep everyone safe, Sarah’s old habits begin to resurface. As the close-knit sisters are pulled in disparate directions, Sarah finds herself estranged from the loving relationships that changed her for the better.”

Watch the trailer…

Returning alongside Tatiana Maslany in the new season are Jordan Gavaris as Sarah’s battle-worn foster brother Felix; Maria Doyle Kennedy as Sarah and Felix’s foster mother Mrs. S; Kristian Bruun as Donnie, Alison’s partner-in-crime and husband; Kevin Hanchard as Art, Beth’s detective partner who’s torn between his job and his loyalty to the clones; Skyler Wexler as Sarah’s long-suffering daughter Kira; Ari Millen as a mysterious new Castor clone, the likes of which we’ve never seen before; and Josh Vokey as Scott, Cosima’s lab partner.

Joel Thomas Hynes joins the cast as Dizzy, “an edgy, self-reliant hacker who doesn’t conform to group mentality”.

BBC America president Sarah Barnett commented last year: “Orphan Black is an entirely fresh and original show that stands out even in today’s crowded TV landscape. Tatiana Maslany’s buzzy, virtuoso performance headlines a brilliant cast and we are delighted to let our vocal and passionate fan base know that this wildly entertaining ride will continue next year.”

Season 4 is expected to premiere in the UK on BBC Three later this year.

Are you looking forward to the return of Orphan Black? Let us know below…