| Name | Character | Episodes |
|---|---|---|
| Paolo Calabresi | master Pietro | 2 |
| Gigi Proietti | cardinal Romeo Colombo da Priverno | 2 |
| Renato Scarpa | cardinal Belloni | 2 |
| Massimo Wertmüller | prosecutor | 2 |
| Greta Scarano | Teresa Ferri | 2 |
| Duccio Camerini | count Ottavio Ricci | 2 |
| Francesco Venditti | Giuseppe Monti | 2 |
| Domenico Diele | Cesare Costa | 2 |
| Paola Tiziana Cruciani | Maria Tognetti | 2 |
| Jerzy Stuhr | Pierre-Jean Beckx (head of the Jesuits) | 2 |
| Sandra Ceccarelli | countess Flaminia Ricci | 2 |