Filmography
Scissors1991 · Director, Writer
The Penthouse1989 · Teleplay
Killer in the Mirror1986 · Director, Writer
The Entity1982 · Novel, Screenplay
Dark Night of the Scarecrow1981 · Director
The Two Worlds of Jennie Logan1979 · Director, Teleplay
Audrey Rose1977 · Novel, Screenplay, Producer
The Savage Is Loose1974 · Writer
Trapped1974 · Director, Writer
Z.P.G.1972 · Writer, Executive Producer
Anzio1968 · Adaptation
The Stately Ghosts of England1965 · Director, Producer, Writer
Witchcraft: The Doll in Brambles1961 · Adaptation