Four young German naval cadets begin their military service in 1940; only one of them will survive.
| Actor | Role |
|---|---|
 Hansjörg FelmyTeichmann | Teichmann |
 Sabine BethmannEdith Wegener | Edith Wegener |
 Wolfgang PreissU-Bootkommandant Lüttke | U-Bootkommandant Lüttke |
 Horst FrankHeyne | Heyne |
 Heinz EngelmannErich Wegener, Flottillenchef | Erich Wegener, Flottillenchef |
 Siegfried LowitzLeutnant Pauli | Leutnant Pauli |
 Dirk DautzenbergObermaat | Obermaat |
 Karl LieffenDr.Timmler | Dr.Timmler |
 Mady RahlDora | Dora |
 Friedrich SchütterOberleutnant Brandstetter | Oberleutnant Brandstetter |
 LoriotMatrose | Matrose |
 Wolfgang WahlWächter | Wächter |
| TThomas BrautNot listed | Not listed |
| EErnst ReinholdNot listed | Not listed |
 Peter FrankNot listed | Not listed |
 Stefan WiggerNot listed | Not listed |
 Reinhold BrandesNot listed | Not listed |