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