Tatiana Maslany Sarah, Beth Actor Dylan Bruce Paul Actor Jordan Gavaris Felix Actor Kevin Hanchard Art Actor Evelyne Brochu Delphine Actor Ari Millen Mark, Rudy Actor Kristian Bruun Donnie Actor Maria Doyle Kennedy Mrs. S Actor Michiel Huisman Cal Morrison Guest Star Tom McCamus Dr. Nealon Guest Star Skyler Wexler Kira Guest Star Josh Vokey Scott Guest Star Zoé De Grand Maison Gracie Johanssen Guest Star Kyra Harper Dr. Virginia Coady Guest Star Natalie Krill Patty Guest Star Amanda Brugel Marci Coates Guest Star Ivan Schneeberg Executive Producer David Fortier Executive Producer