Shortly after moving into a dark, brooding mansion, a psychologist and his co-workers are terrorized by a horrible evil being.
| Actor | Role |
|---|---|
 Richard CrennaC.J. Arnold | C.J. Arnold |
 Joanna PettetDr. Caroline Arnold | Dr. Caroline Arnold |
 Andrew PrineProf. Raymond Guy | Prof. Raymond Guy |
 Cassie YatesMary Harper | Mary Harper |
 George O'Hanlon, Jr.Pete Brooks | Pete Brooks |
 Lynne MoodyFelicia Allen | Felicia Allen |
 Mary Louise WellerLaurie Belman | Laurie Belman |
 Robert ViharoDwight | Dwight |
 Victor BuonoThe Devil | The Devil |
 Milton SelzerThe Realtor | The Realtor |
| EEd BakeySam the Caretaker | Sam the Caretaker |
| GGalen ThompsonEmilio Vargas | Emilio Vargas |
| EEmory SouzaThe Demon | The Demon |