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

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