 Antonio SabàtoCommissioner Fernando Solmi | Commissioner Fernando Solmi |
 Luciana PaluzziInspector Giovanna Nunziante | Inspector Giovanna Nunziante |
| EEnrico Maria SalernoPolice Chief Carraro | Police Chief Carraro |
 Gabriele FerzettiProfessor Andrea Icardi | Professor Andrea Icardi |
 Elio ZamutoProfessor Giacometti | Professor Giacometti |
 Ettore ManniEnrico Tummoli | Enrico Tummoli |
 Marino MaséFranz Hekker - 'Francesco Pagano' | Franz Hekker - 'Francesco Pagano' |
 Bedy MorattiEmilia Icardi | Emilia Icardi |
| AAdriana FioreStripper | Stripper |
 Franco ResselGynaecologist | Gynaecologist |
 Margherita HorowitzAntonietta - Icardi's maid | Antonietta - Icardi's maid |
 Tino BianchiPolice Commissioner | Police Commissioner |
 Valentino MacchiPetrol Station Attendant | Petrol Station Attendant |
 Andrea LalaMarshall Attardi | Marshall Attardi |
| BBenedetto BenedettiNot listed | Not listed |
 Mario ErpichiniMinister Mordini | Minister Mordini |
| AAnna MirafioreNot listed | Not listed |
 Adriano Amidei MiglianoDog team leader | Dog team leader |
 Attilio DottesioForensic Doctor | Forensic Doctor |
 Ida Di BenedettoHouse Madam | House Madam |
 Leila DuranteNurse (as Leila Ducci) | Nurse (as Leila Ducci) |
 Gloria PiedimonteCarla | Carla |
 Andrea ScottiHead of Scientific Team | Head of Scientific Team |
 Fernando CerulliMorgue Watchman | Morgue Watchman |
 Fulvio MingozziPolice Inspector | Police Inspector |
 Salvatore BillaMan in the city | Man in the city |
 Adriana FalcoFiorella Icardi | Fiorella Icardi |
 Ilona StallerProstitute | Prostitute |
 Nestore CavaricciPoliceman (uncredited) | Policeman (uncredited) |
