Season Four of Being Human opens with the roommates coping with Josh, who is permanently a wolf, although the full moon has a very different effect on him now, which drives Nora to extremes in order to get her husband back. Visitors from Aidan’s haunted past, including an elusive character bearing an uncanny likeness to his long lost wife Suzanna (Katharine Isabelle), as well as his maker Bishop (Mark Pellegrino), collide with the present and Aidan is forced to make impossible decisions affecting those closest to him. Sally finds herself trapped alone with the witch, Donna (Amy Aquino), but her newfound magical powers may be more than either of them bargained for.