Color by Technicolor.
An Anglo-French co-production, made by Warwick Film Productions Ltd. and Universal Productions France. Shot on location in France, Britain, Austria, and Italy, and at Pinewood Studios, Iver Heath, England.
Additional cast: Denis Carey (Casspon), Adrien Cayla-Legrand (The President), Olga Georges-Picot (Denise), Raymond Gerome (Flavigny), Bernard Archard, Jacques Alric, Colette Berge, Edmond Bernard, Gerard Buhr, Maurice Teynac, Van Doude, and Nicolas Vogel.
Additional credits: Pierre Charron (set decorator France), Andre Domage & David Harcourt (camera operators), John Rosenberg (script editor), Peter Price (assistant director England), Jenia Reissar (casting director), Pierre Berroyer (makeup), Chanel (Delphine Seyrig's clothes), and Georges Iaconelli (special effects).