Gregory Ratoff
Director Edward Small
Executive Producer

Orson Welles
Joseph Balsamo aka Count Cagliostro Nancy Guild
Marie Antoinette / Lorenza Akim Tamiroff
Gitano Frank Latimore
Gilbert de Rezel Valentina Cortese
Zoraida Margot Grahame
Mme. du Barry Stephen Bekassy
Viscount de Montagne Berry Kroeger
Alexandre Dumas, Sr. Gregory Gaye
Chambord / Monk (as Gregory Gay) Raymond Burr
Alexandre Dumas, Jr. Charles Goldner
Dr. Franz Anton Mesmer Lee Kresel
King Louis XVI / Innkeeper

Alexandre Dumas
Novel Charles Bennett
Screenplay Richard Schayer
Screenplay Paul Sawtell
Music Ubaldo Arata
Director of Photography Anchise Brizzi
Director of Photography Otello Martelli
Director of Photography Fred R. Feitshans Jr.
Editor James C. McKay
Editor Renzo Lucidi
Editor