Dean Reed

as Bob Martin

Fabio Testi

as Francesco di Villaverde

Ini Assmann

as Ellen Kent

Leon Askin

as Peppe Mangano

Werner Peters

as Charly Hollmann

Riccardo Garrone

as Armando Locatelli

Mario Brega

as Riccardo

Hélène Chanel

as Angela

Femi Benussi

as Lois Simmons

Renato Baldini

as Lionel Simmons

Teodoro Corrà

as Rinaldo

Lanfranco Cobianchi

as

Tom Felleghy

as Berry

Nadja Tiller

as Maria di Villaverde

Anita Ekberg

as Sophia Ferretti

Adolfo Celi

as "der Professor"

Marlies Petersen

as Babsie

Bruno Ariè

as Charly's Henchman

Antonietta Fiorito

as (credit only)