| Name | Character | Episodes |
|---|---|---|
| Dieter Borsche | Direktor Lenz | 19 |
| Günther Schramm | Studienrat Hellmund | 19 |
| Claus Holm | 2 | |
| Friedrich Schoenfelder | 1 | |
| Amadeus August | Klaus Bertram | 1 |
| Reinhard Kolldehoff | 1 | |
| Ronald Nitschke | 1 | |
| Harald Juhnke | 1 | |
| Wolfgang Condrus | 1 | |
| Tilly Lauenstein | 1 | |
| Gernot Endemann | 1 | |
| Frank Glaubrecht | 1 | |
| Bruno Dietrich | 1 | |
| Franz Nicklisch | Georg Wenk | 1 |