John Nesbitt

Narrator (voice)

Shepperd Strudwick

Dr. Semmelweis

Rudolph Anders

Doctor (uncredited)

King Baggot

Passerby (uncredited)

William Bailey

Passerby (uncredited)

Barbara Bedford

Nun Reading Book (uncredited)

Ralph Brooks

Medical Student at Lecture (uncredited)

Mary Howard

Young Stricken Mother (uncredited)

Leonard Penn

Semmelweis' Assistant (uncredited)

Beatrice Roberts

Passerby (uncredited)

Edward Van Sloan

Hospital Chief of Staff (uncredited)

E. Alyn Warren

Professor (uncredited)