From a media release:

Space announced today its original series ORPHAN BLACK is getting a new Thursdays at 10 p.m. ET timeslot when Season 4 premieres April 14. In Season 4, Sarah returns home from Iceland to track down an elusive new ally tied to Beth’s past. With the stakes higher than ever before, Sarah follows Beth’s footsteps into a dangerous relationship with a potent new enemy, and seeks to uncover the missing chapter of the clone conspiracy.

Immediately following the Season 4 premiere of ORPHAN BLACK, Space’s daily flagship entertainment show INNERSPACE returns with the fan-favourite aftershow, INNERSPACE: AFTER THE BLACK. Every Thursday night at 11 p.m. ET, INNERSPACE hosts Ajay Fry, Morgan Hoffman, and Teddy Wilson convene and dissect each thrilling, new episode with the cast and special guests from ORPHAN BLACK.

Season 4 sees the return of the phenomenal Tatiana Maslany to her Golden Globe® and Emmy®-nominated role as multiple characters on the CSA and Peabody Award-winning series ORPHAN BLACK. The third season of this mind-bending thriller plunged into the clone sisterhood, as they came together to combat the new line of male “Castor” clones and their journey towards the truth of who, and what they are.