| Name | Character | Episodes |
|---|---|---|
| Bernard Woringer | Walter | 6 |
| Stéphane Bouy | Perez | 6 |
| Gilles Kohler | Briand | 6 |
| Fanny Ardant | Jeanne Laurent | 5 |
| Jacques Dacqmine | Le professeur Jean-Paul Masson | 2 |
| Anton Diffring | O'Brien | 1 |
| Haydée Politoff | Marie Morand | 1 |
| Nicolas Pignon | Saül Masson | 1 |