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)