In 1939 German U-boat captain Günther Prien receives orders to infiltrate the British Royal Navy base at Scapa Flow and sink British warships.
Dieter Eppler
as Kapitän Günther Prien
Sabine Sesselmann
as Ingeborg Prien
Joachim Fuchsberger
as Oberleutnant Thomas Birkeneck
Harald Juhnke
as Der Smut
Dieter Borsche
as Pfarrer Kille
Olga Tschechowa
as Fürstin
Horst Naumann
as Leitender Ingenieur
Heinz Engelmann
as Besatzungsmitglied
Michael Cramer
as Besatzungsmitglied
Peter Carsten
as Besatzungsmitglied
Matthias Fuchs
as Jörg Christiansen
Joachim Mock
as Kapitänleutnant Schopf
