| Episode cast overview, first billed only: |
 | Michele Placido | - | Commissario Corrado Cattani |
 | Barbara De Rossi | - | Contessa Raffaella 'Titti' Pecci Scialoia |
 | Patricia Millardet | - | Magistrato Silvia Conti |
| Nicole Jamet | - | Else Cattani |
| Angelo Infanti | - | Sante Cirinná |
| Pino Colizzi | - | Nanni Santamaria |
| Renato Mori | - | Vice-Commissario Giuseppe Altero |
| Massimo Bonetti | - | Vice-Commissario Leo De Maria (credit only) |
| Simona Cavallari | - | Ester Rasi |
| Eurilla del Bono | - | Anna Caruso |
 | Cariddi McKinnon Nardulli | - | Paola Cattani (as Cariddi Nardulli) |
| Michele Abruzzo | - | Prosecutor Scardona (credit only) |
| Geoffrey Copleston | - | Alfredo Ravanusa |
 | Jacques Dacqmine | - | Professor Sebastiano Cannito |
 | Paul Guers | - | Professor Gianfranco Laudeo |
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