From the network episode description:
Orphan Black, Space – â€œHistory Yet To Be Writtenâ€ season 3 finale
Castor and Topside force Sarah to make uneasy alliances. But there is some rest for the wicked, when Donnie gives Helena an unexpected â€˜giftâ€™, and the results of Alisonâ€™s candidacy finally come in. Even as team Leda takes a moment to breathe, change is afoot and a life hangs in the balance.