Jaap van Leyden
Helène van Leyden
von Schiffer
Krampf
Captain Müller
Schoolmistress
Willem van Leyden
Janni Peters
Bastiaan Peters
Jost Meertens
Cornelis Smit
Bertha
Dirk
Joop
Admiral
Johann
Captain of the U-boat (as Lieut. Schouwenaar R.N.N.)
Lieutenant of the U-boat (as Lieut. van Dapperen R.N.N.)
Navigator of the U-boat
Chief of Police
Captain Schneider (as Laurence O'Madden)
Lieutenant Wernicke
Bohme
Markgraf
Girl (uncredited)
(uncredited)
Old lady (uncredited)