Baron Conrad Crusenhielm is hit in the head during a drunken brawl. Suffering from amnesia, he is mistaken for the lost sailor Karlsson and taken to the navy vessel Fylgia.
| Actor | Role |
|---|---|
 Åke SöderblomCronrad Crusenhielm | Cronrad Crusenhielm |
 Marianne LöfgrenCecilia Söderquist | Cecilia Söderquist |
 Bojan WestinMargaretha Söderquist | Margaretha Söderquist |
 Arthur FischerEmil Blomgren | Emil Blomgren |
 Allan BohlinSecond-in-command | Second-in-command |
 Fritiof BillquistGöran Göransson | Göran Göransson |
 Egon LarssonSjöberg | Sjöberg |
| BBert SorbonKurre Karlsson | Kurre Karlsson |
 Edvin AdolphsonMateo Carotti | Mateo Carotti |
 ElisavetaLucretia Carotti | Lucretia Carotti |
 Naima WifstrandMamma Carotti | Mamma Carotti |
| RRobert PeiperMarco Carotti | Marco Carotti |
 Carl HagmanFagotti | Fagotti |
 Carl-Olof AlmNavy officer | Navy officer |
| GGustaf Hiort af OrnäsFinger print expert | Finger print expert |
 Åke EngfeldtNavy officer | Navy officer |
| GGunnar LundinNavy officer | Navy officer |
 Astrid BodinDancing woman | Dancing woman |
 Birger ÅsanderValet | Valet |
 Jan-Olof StrandbergNavy sailor | Navy sailor |
| EErnst WelltonPolice officer | Police officer |
 Per-Axel AroseniusKurre Karlsson's friend | Kurre Karlsson's friend |