 Stéphane AudranDominique | Dominique |
 Klaus KinskiPavel Richko / Torpédo I | Pavel Richko / Torpédo I |
 Lilli PalmerHelen | Helen |
 Michel ConstantinCoster | Coster |
 Angelo InfantiJean / Gianni | Jean / Gianni |
 Jean ClaudioFédor 'La Filature' | Fédor 'La Filature' |
 Frédéric de PasqualeNicolas Baslier Krestowitz | Nicolas Baslier Krestowitz |
 Noëlle AdamLaurence, Dominique's friend | Laurence, Dominique's friend |
 Philippe MarchThe effeminate salesman | The effeminate salesman |
 Christine FabrégaSylvianne Collet | Sylvianne Collet |
 Jacques HardenThe Paris police inspector | The Paris police inspector |
 Micheline LuccioniThe postal worker | The postal worker |
 Georges LycanTorpédo II | Torpédo II |
| PPhilippine PascalThe policewoman | The policewoman |
 Bernard MussonFécamp police inspector | Fécamp police inspector |
 Roger LumontThe truck driver | The truck driver |
 Robert FavartThe Chief Commissioner | The Chief Commissioner |
| CCatherine JacobsenFrançoise Ormesseq, aka 'La 'boîte aux lettres' | Françoise Ormesseq, aka 'La 'boîte aux lettres' |
| HHenri GilabertNot listed | Not listed |
 Pierre KoulakAn inspector | An inspector |
| AAlexandre KlimenkoNot listed | Not listed |
| GGérard DauzatNot listed | Not listed |
 Paul BiscigliaNot listed | Not listed |
 Rita MaidenThe prostitute | The prostitute |
 Michel CharrelAn inspector | An inspector |
 Christian BrocardThe man in the mortuary (uncredited) | The man in the mortuary (uncredited) |
 Marie-Pierre CaseyThe woman in the mortuary (uncredited) | The woman in the mortuary (uncredited) |
 Roland MaletA police officer (uncredited) | A police officer (uncredited) |
 Yves MassardAn Inspector at the tail (uncredited) | An Inspector at the tail (uncredited) |
 Paul PavelAn Inspector at the tail (uncredited) | An Inspector at the tail (uncredited) |
