 Lars HansonVictor Barring | Victor Barring |
 Gunnel BroströmEva Barring | Eva Barring |
 Olof BergströmArne Hedberg | Arne Hedberg |
 Nils DahlgrenHarald Barring | Harald Barring |
 Anna LindahlMargit Barring | Margit Barring |
 Arne RagnebornBengt | Bengt |
 Georg FunkquistDr. Kanzel | Dr. Kanzel |
 Wiktor AnderssonEkman | Ekman |
 David EriksonEwers | Ewers |
| EErik RosénChief Physician | Chief Physician |
 Magnus KessterKanzel's Henchman | Kanzel's Henchman |
 Harry AhlinKanzel's Henchman | Kanzel's Henchman |
 Sven BergvallMember of Royal Academy of Sciences | Member of Royal Academy of Sciences |
 Britta BillstenLab Assistant (uncredited) | Lab Assistant (uncredited) |
 Erland CollianderMan at the Peace Meeting (uncredited) | Man at the Peace Meeting (uncredited) |
 Carl HagmanMan at the Peace Meeting (uncredited) | Man at the Peace Meeting (uncredited) |
| NNils JohannissonMan at Meeting (uncredited) | Man at Meeting (uncredited) |
 Ivar WahlgrenMan (uncredited) | Man (uncredited) |
 Ingemar PallinMan at the Peace Meeting (uncredited) | Man at the Peace Meeting (uncredited) |
| HHans SundbergMan at the Peace Meeting (uncredited) | Man at the Peace Meeting (uncredited) |
 Hanny SchedinMother of Boy Run over (uncredited) | Mother of Boy Run over (uncredited) |
| RRolf GregorLab Assistant (uncredited) | Lab Assistant (uncredited) |
| GGunnar NielsenLab Assistant (uncredited) | Lab Assistant (uncredited) |
 Stig JohansonLorry Driver (uncredited) | Lorry Driver (uncredited) |
 Gunnar SchymanPeace Activist (uncredited) | Peace Activist (uncredited) |
