BBC America's flagship cloning drama Orphan Black has been renewed for a fifth and final 10-episode season, one that's set to hit the air sometime in 2017. The renewal's being announced on the same day as the show's fourth season finale, which is airing tonight at 10PM ET. Its first four seasons have earned plenty of praise for their in-depth treatment of human cloning and its ethical implications, and Tatiana Maslany has earned dozens of award nods for her lead performance, including an Emmy nomination for Outstanding Lead Actress in a Drama Series in 2015. (The award was ultimately won by Viola Davis for How to Get Away With Murder.)

"Orphan Black is a thrilling, genre-bending ride that's captured our fans' imaginations and hearts like no other show," wrote BBC America president Sarah Barnett in a statement. "Tatiana has [given]... one of the most remarkable performances on television, and she's joined by an extraordinary cast. We can't wait to take our incredibly passionate audience on one final gobsmacking clone adventure."

"We're excited to deliver an epic conclusion to the tale of Sarah and her clone sisters," added co-creators John Fawcett and Graeme Manson. "The past four seasons have been a phenomenal adventure and we're eternally grateful to our loyal fans who have loved the twists and thrills of our weird little show."