 Inspired by Nicolas Roeg's "Don't Look Now" (1973) and the films of Alfred Hitchcock, writer-director Sole devised the screenplay with Rosemary Ritvo, an English professor who was his neighbor.At the time, Sole had been working as an architect restoring historic buildings in his hometown of Paterson, New Jersey, and several properties he had worked on were used as shooting locations.Filming took place throughout the summer of 1975 in Paterson and Newark.