Guest Stars Shazad Latif as Dr. Henry Jekyll Samuel Barnett as Renfield Christian Camargo as Dr. Alexander Sweet Jessica Barden as Justine Perdita Weeks as Catriona Hartdegen Co Starring Casper Allpress as Jack Pandora Colin as Maggie / Marjorie Steve Wilson as Attendant - Bedlam Kieron Duffy as Boy Familiar #2 Aonghus Og McAnally as Docker