This Nazi propaganda film follows the exploits of a German submarine as it prowls the North Atlantic.
Herbert Wilk
as Kapitänleutnant Hoffmeister
Heinz Engelmann
as Olt. zur See Wiegand
Joachim Brennecke
as Lt. zur See v. Benedict
Wilhelm Borchert
as Olt. Griesbach
Carsta Löck
as Merk
Willi Rose
as Matr. Fliepusch
Ilse Werner
as Irene Winterfeld
Karl John
as Matrosenobergefreiter Drewitz
Agnes Windeck
as Frau von Benedikt
Hans Mierendorff
as Vater Griesbach
Claire Reigbert
as Frau Hahn
Herbert Weißbach
as Ober
