Characters played by George Peppard
Reno Davis
Characters played by Inger Stevens
Anne de Villemont
Characters played by Orson Welles
Leschenhaut
Characters played by Keith Michell
Général Sébastien Henri René de Villemont
Dr Morillon
Characters played by Perrette Pradier
Jeanne-Marie
Characters played by Geneviève Cluny
Veronique
Characters played by Maxine Audley
Mathilde Rosier
Characters played by Ralph Michael
Claude de Gonde
Characters played by Jacques Roux
Maguy
Characters played by Patience Collier
Gabrielle de Villemont
Characters played by William Job
Bourdon
Characters played by Peter Bayliss
Edmond Rosier
Characters played by Barnaby Shaw
Paul de Villemont
Characters played by Ave Ninchi
Signora Orragi
Characters played by Renzo Palmer
Pietro Rossi - the false monk
Characters played by Francesco Mulè
Policeman at Trevi Fountain
Characters played by Rosemary Dexter
Daniela
Characters played by Raoul Delfosse
Louis Le Buc
Characters played by James Mishler
Jesse Hardee
Characters played by Jean Louis
Driot
Characters played by Jean Hébey
Man in charge of sleeping cars
Characters played by Jacques Stany
Georges - the family chauffeur
Characters played by Paule Albert
Sophie
Characters played by Calisto Calisti
Police Inspector at Rome Station
Characters played by Andrea Esterhazy
de Villemont Party Guest