| Name | Character | Episodes |
|---|---|---|
| Henning Schlüter | Dr. Wolff sen. | 33 |
| Iris Berben | Clara Constalla | 1 |
| Ursela Monn | Isolde Kurz | 1 |
| Ernst Stankovski | Herr Uhland | 1 |
| Dietrich Mattausch | Herr Bergschulz | 1 |
| Peter Ehrlich | 1 | |
| Klaus Höhne | Prof. Achterberg | 1 |
| Dietmar Schönherr | Eugen Katerle | 1 |
| Michael Degen | Petersen | 1 |
| Gunnar Möller | Buchecker | 1 |
| Christine Kaufmann | 1 | |
| Wolfgang Preiss | 1 | |
| Elisabeth Wiedemann | 1 | |
| Ilse Werner | 1 | |
| Jörg Pleva | Blinky | 1 |
| Evelyn Hamann | Beate Rabe | 1 |