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

Montserrat Riba Vidal

Rosy Miller (as Monserrat Riba)

Susy Andersen

Sdenka (archive footage) (uncredited)

Guido Barlocci

Unknown (uncredited)

Bruno Boschetti

Policeman (uncredited)

Elina De Witt

Model (uncredited)

Rika Dialyna

Maria (archive footage) (uncredited)

Boris Karloff

Gorca (archive footage)

Glauco Onorato

Giorgio (archive footage) (uncredited)