"A hypnotist uses his powers for revenge against King Louis XV's court."
Orson Welles
as Joseph Balsamo aka Count Cagliostro
Nancy Guild
as Marie Antoinette / Lorenza
Akim Tamiroff
as Gitano
Frank Latimore
as Gilbert de Rezel
Valentina Cortese
as Zoraida
Margot Grahame
as Mme. du Barry
Stephen Bekassy
as Viscount de Montagne
Berry Kroeger
as Alexandre Dumas, Sr.
Gregory Gaye
as Chambord / Monk (as Gregory Gay)
Raymond Burr
as Alexandre Dumas, Jr.
Charles Goldner
as Dr. Franz Anton Mesmer
Lee Kresel
as King Louis XVI / Innkeeper
Robert Atkins
as King Louis XV
Nicholas Bruce
as De Remy
Franco Corsaro
as Chico
Annielo Mele
as Joseph Balsamo as a Child
Ronald Adam
as Court President
Bruce Belfrage
as Crown Prosecutor
Alexander Danaroff
as Dr. Duval / Baron von Minden
Leonardo Scavino
as Gaston / Beniamino Balsamo (as Leon Lenoir)
Tamara Shayne
as Maria Balsamo
Joop van Hulzen
as Minister of Justice
Peter Trent
as Dr. Mesmer's Friend
Giuseppe Varni
as Boehmer
Tatyana Pavlova
as Grieving Mother
Harriet Medin
as (uncredited)
Valentino Bruchi
Ludmilla Dudarova
Rosina Galli
Silvana Mangano
Filippo Minelli
Michele Sakara
Nicholas Soussanin
Milly Vitale
Gregory Ratoff
Director
Alexandre Dumas
Novel
Charles Bennett
Screenplay
Richard Schayer
Producer
Dario Sabatello
Associate Producer
Edward Small
Executive Producer
Paul Sawtell
Music
Ubaldo Arata
Director of Photography
Anchise Brizzi
Otello Martelli
Fred R. Feitshans Jr.
Editor
James C. McKay
Renzo Lucidi
Ottavio Scotti
Art Direction
Jean d'Eaubonne
Gino Brosio
Set Decoration
Don L. Cash
Makeup Artist
Georges Annenkov
Costume Design
Vittorio Nino Novarese
