The next season of BBC America’s “Orphan Black” will be bittersweet, while it is shaping up to be one of the best seasons yet, it will also be the last. The network announced the cast for the final season of the hit sci-fi series, which will feature the return of Tatiana Maslany to her Emmy-winning role as multiple characters in the Peabody Award-winning show.

Orphan Black is produced by Temple Street Productions, a division of Boat Rocker Studios, in association with BBC AMERICA and Bell Media’s SPACE.

Earlier this morning BBCA hosted a Facebook Live broadcast, on location, while filming a scene with one of Tatiana Maslany’s fan-favorite characters, Helena. Fans can watch that video here, or in the embedded video below.

Sarah Barnett, President of BBC AMERICA, stated, “Since the beginning, BBCA has worked with the incredibly talented cast and crew of Orphan Black to create deep relationships with the show’s fans. As the team reunites to shoot season five, we all wanted to invite the Clone Club to something pretty special – a virtual set visit with Facebook Live. This innovative event marks the beginning of our celebrations leading up to the final season of this unique show in 2017.”

“It’s with mixed feelings that we start this final leg of our journey with Sarah and her sisters,” said David Fortier and Ivan Schneeberg, Executive Producers of Orphan Black and Co-Presidents of Boat Rocker Studios. “We are incredibly proud of Orphan Black and what it’s come to mean to all those involved and, especially, the fans. Our pride is only matched by our gratitude to the wonderfully talented writers, producers, cast and crew who have been so dedicated to bringing to life such engaging and compelling characters and storylines.”

Returning to Orphan Black this season are fan-favorites Jordan Gavaris as Sarah’s battle worn foster brother Felix; Kristian Bruun as Alison’s incredibly devoted husband Donnie; Maria Doyle Kennedy as Sarah and Felix’s fiercely loyal and stouthearted foster mother Mrs. S; Kevin Hanchard as Art, a detective torn between being a good cop and his loyalty to the clones; Ari Millen as castor clone Ira; Josh Vokey as Scott, science geek and confidante to Cosima; and Skyler Wexler as Sarah’s daughter Kira. Also returning this season – James Frain as Ferdinand, an intimidating and scheming executive; Evelyne Brochu as love-torn scientist Delphine; and Calwyn Shurgold as Hell Wizard. Joining the cast this season is Elyse Levesque as Detective Engers, a dirty Neolution cop who is a true believer; Andrew Moodie as Mr. Frontenac, Rachel’s new mysterious consultant; Simu Liu as Mr. Mitchell, Kira’s new homeroom teacher; Jenessa Grant as Mud, an eclectic young islander; and Stephen McHattie as P.T. Westmoreland, the mythical 170-year-old founder of Neolution.

Spearheaded by co-creator Graeme Manson, the writing team includes returning writer Alex Levine and new writers Jeremy Boxen, Greg Nelson, Jenn Engels, David Bezmozgis, Renee St Cyr, Natalia Guled, and Aisha Porter-Christie. Returning to direct is co-creator John Fawcett, along with David Frazee, Aaron Morton, David Wellington, Grant Harvey, and Helen Shaver.

Orphan Black is executive produced by Ivan Schneeberg and David Fortier, Graeme Manson, John Fawcett and Kerry Appleyard. The series is co-created by Manson and Fawcett, with Manson also serving as writer and Fawcett as director. BBC Worldwide distributes the series internationally.

BBCA’s slate includes Orphan Black, Dirk Gently’s Holistic Detective Agency, Doctor Who, Top Gear, Class, upcoming two-night event Undercover and Planet Earth II.