| 1 | Guido | Brunetti | Protagonist / An Italian detective. |
| | Guissepe | Patta | Guido Brunetti's superior. |
| | Lieutenant | Scarpa | A native palermo assistant of Guissepe Patta. |
| | Elettra | Zorzi | Guissepe Patta's secretary. |
| 3 | Lorenzo | Vianello | A police inspector. |
| | Luca | Vianello | Vianello's son. |
| | Alvise | | The shortest man in the police force. |
| | Elisa | Crosera | Acquaintance of Paola / A teacher. |
| | Paola | Brunetti | Guido Brunetti's wife. |
| | Alessandro | Gasparini | Signora. Elisa Crosera and Tullio Gasparini's son. aka: Sandro. |
| | Aurelia | Gasparini | Signora. Elisa Crosera and Tullio Gasparini's daughter. |
| 5 | Raffi | Brunetti | Guido and Paola Brunetti's son. |
| | Chiara | Brunetti | Guido and Paola Brunetti's daughter. |
| 6 | Claudia | Griffoni | Guido Brunetti's colleague and friend. |
| | Ambrosio | | One of the Bocchese's men who responded on Tullio's accident. |
| 8 | Dottore | Stampini | The chief neurologist. |
| 9 | Tullio | Gasparini | Signora. Elisa Crosera's husband / Alessandro and Aurelia's father. |
| 10 | Bianca | Rallo | The director of Albertini School. |
| | Bruno | | Guido Brunetti's friend. |
| | Manrico | | Guido Brunetti's old acquaintance. |
| 12 | Gianluca | Fornari | A man who sells drug to minors. |
| 13 | Dottore | Bordini | A doctor. |
| 19 | Matilde | Gasparini | Tullio Gasparini's aunt. |
| | Beata | | Matilde Gasparini's caretaker. |
| 21 | Marco | | Matilde Gasparini's doctor. |
| | Anna | Marcolini | Matilde Gasparini's friend / A cheese seller. |
| | Signora | Lamon | Matilde Gasparini's friend / Dottor. Donato's client. |
| | Girolamo | Donato | A pharmacist who owns the Farmacia Della Fontana / Matilde's pharmacist. |
| | Beatrice | Rossi | Guido Brunetti's first girlfriend. |
| | Lucilla | | A pharmacist. |
| | Rolando | Rossi | Beatrice Rossi's husband. |
| 23 | Constantino | Belli | Lucia's boyfriend. |
| | Lucia | Arditi | A woman who was in the hospital for 3 days. |
| | Cara | Marini | A client in the drug store. |
| | Carla | Roberti | Dottor Donato's co-doctor / Matilde Gasparini's former doctor. |
| 28 | Barbara | | Signorina Elettra's sister. |
| | Signor | Tassetto | Doctor Ruberti's patient. |
| | Teodoro | Ruberti | Cara Ruberti's son. aka: Teo. |
