From Dalton Ross of Entertainment Weekly:
Link: Orphan Black creator promises more flashbacks in final season
I think this season is really about freedom. It’s the final season and the clone sisters have to be all-in. Cosima is all-in to find a cure, to find her own cure, and the cure for the sisters. Sarah’s all-in, fighting and scrapping for everybody’s freedom. Helena’s all-in because she’s eight and a half months pregnant when we start. So if you take some stakes like that, it’s a very high-stakes season and it revolves around Helena’s pregnancy. It also revolves around Kira — we’re really going to get to the bottom of Sarah’s daughter this year. Continue reading.