"After landing on a mysterious planet, a team of astronauts begin to turn on each other, swayed by the uncertain influence of the planet and its strange inhabitants."
Barry Sullivan
as Captain Mark Markary
Norma Bengell
as Sanya
Ángel Aranda
as Wess
Evi Marandi
as Tiona
Stelio Candelli
as Brad / Mud
Franco Andrei
as Bert / Garr
Fernando Villena
as Dr. Karan
Mario Morales
as Eldon
Ivan Rassimov
as Carter / Dervy
Federico Boido
as Keir
Alberto Cevenini
as Toby Markary / Wan
Massimo Righi
as Captain Sallas / Nordeg
Vito Fasano
as (uncredited)
Mario Bava
Director
Giorgio Giovannini
Production Design
Serena Canevari
First Assistant Director
Renato Pestriniero
Original Story
Giorgio Aureli
Assistant Camera
Giancarlo Del Brocco
Assistant Makeup Artist
Lucio Romeo
Script Supervisor
Mario Ronchetti
Sound
Mario Silvestri
Line Producer
Lamberto Bava
Second Assistant Director
Rosalba Scavia
Saverio Diamante
Camera Operator
Paolo Ketoff
Sound Effects
Manuel San Román
Eugenio Fiori
Boom Operator
Giancarlo Sambucini
Production Manager
Emilio Zago
Assistant Set Decoration
Romana Fortini
Editor
Gino Marinuzzi Jr.
Original Music Composer
Gabriele Mayer
Costume Design
Gabriella Borzelli
Hairstylist
Fulvio Lucisano
Producer
Antonio Rinaldi
Director of Photography
Antonio Gimeno
Amato Garbini
Makeup Artist
Carlo Rambaldi
Special Effects
Callisto Cosulich
Screenplay
Ib Melchior
Alberto Bevilacqua
Rafael J. Salvia
Antonio Román