True story of the doctor who considered it was not immoral to search for a drug that would cure syphilis.
Edward G. Robinson
Dr. Paul Ehrlich
Ruth Gordon
Mrs. Ehrlich
Otto Kruger
Dr. Emil Von Behring
Donald Crisp
Minister Althoff
Maria Ouspenskaya
Franziska Speyer
Montagu Love
Professor Hartmann
Sig Ruman
Dr. Hans Wolfert
Donald Meek
Mittelmeyer
