Cast
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
Henry O'Neill
Dr. Lentz
Albert Bassermann
Dr. Robert Koch
Edward Norris
Dr. Morgenroth
Harry Davenport
Judge
Louis Calhern
Dr. Brockdorf
Louis Jean Heydt
Dr. Kunze
Charles Halton
Sensenbrenner
