Shortly after moving into a dark, brooding mansion, a psychologist and his co-workers are terrorized by a horrible evil being.
Richard Crenna
as C.J. Arnold
Joanna Pettet
as Dr. Caroline Arnold
Andrew Prine
as Prof. Raymond Guy
Cassie Yates
as Mary Harper
George O'Hanlon, Jr.
as Pete Brooks
Lynne Moody
as Felicia Allen
Mary Louise Weller
as Laurie Belman
Robert Viharo
as Dwight
Victor Buono
as The Devil
Milton Selzer
as The Realtor
Ed Bakey
as Sam the Caretaker
Galen Thompson
as Emilio Vargas
