Peter
Michael Sopkiw
Dr. Stella Dickens
Valentine Monnier
Dr. Bob Hogan
Dino Conti
Fisherman / Victim
Goffredo Unger
Sheriff Gordon
Gianni Garko
Professor Donald West
William Berger
Sandra Hayes
Iris Peynado
Dr. Davis Barker
Lawrence Morgant
Florinda
Cinzia de Ponti
Miller
Paulo Branco
Sonja West
Dagmar Lassander
Dr. Janet Bates
Darla N. Warner
Screenplay
Dardano Sacchetti
Producer
Mino Loy
Story
Sergio Martino
Second Unit
Original Music Composer
Fabio Frizzi
Director of Photography
Giancarlo Ferrando
Production Design
Massimo Antonello Geleng
Costume Design
Bruno Mattei
Director
Lamberto Bava
Additional Writing
Luigi Cozzi
Production Manager
Sergio Borelli
Special Effects
Germano Natali
Hervé Piccini
Makeup Artist
Giuseppe Ferranti
Gianfranco Clerici
Editor
Roberto Sterbini