Cast
Jacques Dufilho
Albert, manservant
Michel Etcheverry
Van Nelden, collector
Jean Galland
General
Alida Valli
Aurélia Valéano
Hubert de Lapparent
French Consul in Florence
Ginette Pigeon
Agnès, nurse
Pierre Duncan
(uncredited)
Paul Müller
Attaché of the French consulate in Florence
Yves Robert
La Ballu
Jean Bellanger
Sleeping car employee
Michel Vocoret
Gérard Darrieu
Sidekick
Judith Magre
(uncredited)
Roger Dumas
Isidore Bautrelet aka 'Véritaz'
Gabriel Gobin
SNCF employee (uncredited)
René Hell
Prison guard (uncredited)
René Lefèvre-Bel
(uncredited)
Paul Préboist
Drunkard of Enghien (uncredited)
Robert Rollis
Traveler on the train (uncredited)
Paul Villé
Secretary of the archives (uncredited)
Gisèle Grandpré
Madame du Bois-Lambert
Harold Kay
Henri
Robert Lamoureux
Arsène Lupin / Lieutenant André Laroche
Robert Dalban
Inspector Béchoux of the Judicial Police