Evelyne Brochu, who plays Delphine, was one of the actresses in the running for the lead role. She didn't get the part but the part of Delphine was written especially for her according to series creator Graeme Manson.
Sarah tells Felix to come to Alison's house in Suburbia. In which he replies, "To Scarberia?" Scarberia also known as Scarborough, is an actual location located in Toronto, Ontario, where the Orphan Black series is filmed.