Manuel Caño
Producer Mario Bava
Director Giuseppe Zaccariello
Producer

Stephen Forsyth
John Harrington Dagmar Lassander
Helen Wood Laura Betti
Mildred Harrington Jesús Puente
Inspector Russell (as Jesus Puente) Femi Benussi
Alice Norton Antonia Mas
Louise Luciano Pigozzi
Vences (as Alan Collin) Gérard Tichy
Dr. Kalleway (as Gerard Tichy) Verónica Llimerá
Betsy Wester (as Veronica Llimera) Pasquale Fortunato
John Harrington as a Boy (as Fortunato Pascuale) Ignasi Abadal
Jimmy Kane (as José Ignacio Abadaz) Silvia Lienas
Vicky

Mario Bava
Screenplay Soledad López
Editor Santiago Moncada
Screenplay Sante Maria Romitelli
Original Music Composer Jaime Deu Casas
Camera Operator Liliana Serra
Assistant Editor Marcello Anconetani
Assistant Camera Giuseppe Parrabano
Still Photographer Jose Adrian
Still Photographer Antonio Rinaldi
Director of Photography Pietro Ortolani
Sound Laura Betti
Screenplay