In the Venetian Republic a series of murders are carried out by a hooded man in black who always makes his escape through the city's waterways on a gondola.
| Actor | Role |
|---|---|
 LoredanaMarina | Marina |
| FFlora MarinoImperia | Imperia |
 Letizia Quarantamadre di Paolo | madre di Paolo |
 Alfredo VarelliPaolo Venier | Paolo Venier |
 Carlo Lombardiavogadore | avogadore |
| EErminio SpallaMarco | Marco |
 Carlo Micheluzziministro di Giustizia | ministro di Giustizia |
 Nino PaveseIdillius | Idillius |
| GGiorgio PiamontiNot listed | Not listed |