Dr. Ehrlich's Magic Bullet

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