Tatiana Maslany Sarah, Beth Actor Jordan Gavaris Felix Actor Kevin Hanchard Art Actor Ari Millen Mark, Ira Actor Kristian Bruun Donnie Actor Josh Vokey Scott Actor Maria Doyle Kennedy Mrs. S Actor Skyler Wexler Kira Guest Star Rosemary Dunsmore Susan Duncan Guest Star Stephen McHattie P.T. Westmoreland Guest Star Kyra Harper Dr. Virginia Coady Guest Star Jenessa Grant Mud Guest Star Lauren Hammersley Adele Guest Star Sarah Orenstein Dr. Elizabeth Perkins Guest Star Cynthia Galant Charlotte Guest Star Calwyn Shurgold Hell Wizard Guest Star Ivan Schneeberg Executive Producer David Fortier Executive Producer