Noël-Noël as Léon Martin

Denise Grey as Marguerite Martin

Francis Blanche as Chazot

Nathalie Nerval as Dina, interpreter

Constantin Nepo as Soviet ambassador

Robert Lombard as Gendarmerie adjutant

Pauline Carton as Marie

Harry-Max as Doctor

Serge Nadaud as Soviet cultural attaché

Henri Coutet as Villager

Sophie Daumier as Mireille Martin

Gil Vidal as Paul de Grandlieu

Mischa Auer as Professor Papov

Darry Cowl as Hubert, government delegate

Noël Roquevert as Mayor of Lésigny