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
