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)