Paul Muni

Character: Louis Pasteur

Josephine Hutchinson

Character: Marie Pasteur

Anita Louise

Character: Annette Pasteur

Donald Woods

Character: Dr. Jean Martel

Fritz Leiber

Character: Dr. Charbonnet

Henry O'Neill

Character: Dr. Emile Roux

Porter Hall

Character: Dr. Rossignol

Raymond Brown

Character: Dr. Radisse

Akim Tamiroff

Character: Dr. Zaranoff

Halliwell Hobbes

Character: Dr. Lister

Frank Reicher

Character: Dr. Pfeiffer

Dickie Moore

Character: Joseph Meister

Ruth Robinson

Character: Mrs. Meister

Walter Kingsford

Character: Napoleon III

Iphigenie Castiglioni

Character: Empress Eugénie

Herbert Corthell

Character: Louis Adolphe Thiers, 1st President, Republic of France