A good doctor is out to stop his evil doctor brother from blackmailing his patients.
Curd Jürgens
as Dr. Jan Diffring
Christiane Rücker
as Margot Rau
Heinz Reincke
as Willi Nippens
Marianne Hoffmann
as Karin Steffen
Fritz Wepper
as Hein Jungermann
Monika Zinnenberg
as Gerda Heske
Friedrich Schütter
as Siegfried Gersum
Suzanne Roquette
as Elisabeth Langhoff
Michael Conti
as Helmut Weiher
Astrid Fournell
as Bärbel Harms
Hans W. Hamacher
as Kriminalrat Janson
Dieter Borsche
as Pfarrer Feddersen
