Geoffrey Horne as Paolo Franchi / Leone Franchi

Valérie Lagrange as Edith

Gérard Barray as Giovanni Sagona

Mario Feliciani as Dr. Dupont

Emma Danieli as Gabrielle De Roux

Jean Servais as Gerolamo Sagona

Amedeo Nazzari as Orlandi

Nerio Bernardi as Prof. Perrier

Alberto Farnese as Gaspare

Germano Longo as Claudio Franchi

Sandro Moretti as Claudio

Laura Solari as Luisa Dupont

Paola Patrizi as Mariella

Lia Zoppelli as zia Mary

Luisa Mattioli as moglie di Domenico

Franco Graziosi as Domenico

Lucilla Morlacchi as Lina

Raoul Grassilli as Raul Sagona

Renato Montalbano as uomo tarchiato col ferro rovente

Luigi Vannucchi as Luigi Sagona

Francesca Benedetti as Adele Franchi

Adriano Micantoni as Lando

Calisto Calisti as Vasco

Laura Nucci as signora Perrier

Giuseppe Pagliarini as commissario

Aldo Pini as conte Morny

Regina Dainelli as (uncredited)