Country Dr. Robert Koch is desperate: a tuberculosis epidemic is decimating the children in his district and no one is able to do anything about it. Every fourth child is already sick and the parents must helplessly watch as their young ones die. Now Koch is undertaking to find the cause of the tuberculosis --- something he has already been working on for years --- which has been causing this plague of illness. His work is made more difficult by envy; for example, that of his teacher, who was wounded defending his honor. But his greatest obstacle is the famous Berliner scientist and Reichstag deputy, Privy Councilor Rudolf Virchow: He is extraordinarily skeptical of Koch's theory, that the cause for tuberculosis is a bacteria.
Hans Steinhoff
Director
Walter Wassermann
Writer
Lotte Neumann
Writer

Emil Jannings
Dr. Robert Koch

Werner Krauss
Geheimrat Rudolf Virchow

Viktoria von Ballasko
Schwester Else

Hilde Körber
Frau Göhrke

Theodor Loos
Dr. Georg Gaffky

Bernhard Minetti
Sprecher der Gesundbeter

Paul Bildt
Baron von Kossin, Reichstagsabgeordneter

Elisabeth Flickenschildt
seine Frau

Paul Dahlke
Lehrer
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