Casts
Edward G. Robinson
as Dr. Paul Ehrlich
Ruth Gordon
as Mrs. Ehrlich
Otto Kruger
as Dr. Emil Von Behring
Donald Crisp
as Minister Althoff
Maria Ouspenskaya
as Franziska Speyer
Montagu Love
as Professor Hartmann
Sig Ruman
as Dr. Hans Wolfert
Donald Meek
as Mittelmeyer
Henry O'Neill
as Dr. Lentz
Albert Bassermann
as Dr. Robert Koch
