"When Dr. Pieter Fales' patients start receiving ominous letters and getting murdered by an unknown black-clad assailant, he and his daughter both come under suspicion."
Klaus Kinski
as Dr. Pieter Fales
Donna Wilkes
as Alison Fales
Marianna Hill
as Julie
Craig Wasson
as Doug
Richard Herd
as Donahue
Joe Regalbuto
as Jake
Christopher Lloyd
as Gilbert
Flo Lawrence
as Pat
Kiva Lawrence
as Rosemary
Claude Duvernoy
as Françoise
Cindy Donlan
as Sally
Jon Greene
as Archie
David Assael
as Barney
Richard Balin
as Freddy
Fredric Cook
as Willy
Kathy Garrick
as Maxine
Gracia Lee
as Bruce
Tobar Mayo
as Fritz
Jonathon Millner
as Fritz's Friend
Frances E. Nealy
as Housekeepe
Kimberly Jensen
as Girl on Motorbike
Jay May
as Boy on Motorbike
Cindy Riegel
as Secretary (uncredited)
Tony Swartz
as Bartender (uncredited)
David Paulsen
Director
Richard S. Brummer
Editor
Robert Fitzgerald
Writer
Yoram Globus
Producer
Menahem Golan
Kathy Curtis-Cahill
Art Direction
Craig Huxley
Original Music Composer
Christopher Pearce
Associate Producer
Ann Bell
Casting
Erica Ueland
Makeup Artist
Norman Leigh
Director of Photography