 Tony MusanteSam Dalmas | Sam Dalmas |
 Suzy KendallJulia | Julia |
| EEnrico Maria SalernoInspector Morosini | Inspector Morosini |
 Eva RenziMonica Ranieri | Monica Ranieri |
 Umberto RahoAlberto Ranieri | Alberto Ranieri |
 Renato RomanoProfessor Carlo Dover | Professor Carlo Dover |
 Giuseppe CastellanoMonti | Monti |
 Mario AdorfBerto Consalvi | Berto Consalvi |
 Pino PattiFaiena | Faiena |
 Gildo Di MarcoGarullo | Garullo |
 Rosita ToroshVictim | Victim |
 Omar BonaroPolice Detective | Police Detective |
 Fulvio MingozziPolice Detective | Police Detective |
 Werner PetersAntique Dealer | Antique Dealer |
 Karen ValentiTina | Tina |
 Carla ManciniGirl Watching TV | Girl Watching TV |
| BBruno ErbaPolice Detective | Police Detective |
 Annamaria SpogliSandra Roversi (uncredited) | Sandra Roversi (uncredited) |
 Giovanni Di BenedettoProfessor Rinaldi (uncredited) | Professor Rinaldi (uncredited) |
 Reggie NalderNeedles (uncredited) | Needles (uncredited) |
 Maria TedeschiOld Lady in Fog (uncredited) | Old Lady in Fog (uncredited) |
 Aldo BarozziPasserby who calls the Police (uncredited) | Passerby who calls the Police (uncredited) |
| UUgo MariMario Zandri (uncredited) | Mario Zandri (uncredited) |
 Romano TargaPoliceman (uncredited) | Policeman (uncredited) |
