All Cast
Paul Muni
Louis Pasteur
Josephine Hutchinson
Marie Pasteur
Anita Louise
Annette Pasteur
Donald Woods
Dr. Jean Martel
Fritz Leiber
Dr. Charbonnet
Henry O'Neill
Dr. Emile Roux
Porter Hall
Dr. Rossignol
Raymond Brown
Dr. Radisse
Akim Tamiroff
Dr. Zaranoff
Halliwell Hobbes
Dr. Lister
Frank Reicher
Dr. Pfeiffer
Dickie Moore
Joseph Meister
Ruth Robinson
Mrs. Meister
Walter Kingsford
Napoleon III
Iphigenie Castiglioni
Empress Eugénie