Filmed at the Congdon Mansion in Duluth, MN. After the murder of mansion owner and prominent heiress Elisabeth Congdon in 1977, a movie theatre in Duluth revived the movie at midnight showings (much to the chagrin of the Congdon family).
Richard Thomas and Sian Barbara Allen fell in love while filming this project. The two began a relationship that lasted for several years in the 1970s.
The film's two top-billed actresses would reteam in Before and After (1979) in which Rosemary Murphy would be featured as the mother of - Patty Duke's lead character.