| Name | Character | Episodes |
|---|---|---|
| Fritz Wepper | Christoph Thaler | 17 |
| Angela Roy | Katja Thaler | 17 |
| Alexander Duda | Dr. Regler | 17 |
| Franka Potente | Mara | 1 |
| Oliver Korittke | Klaus Stolze | 1 |
| Barbara Rudnik | Heike Mende | 1 |
| Dirk Martens | Dr. Conny Heuer | 1 |
| Jan-Gregor Kremp | Ben Barthels | 1 |
| Rolf Zacher | Klaus Noller | 1 |
| Sky du Mont | Dr. Raimund Bachmaier | 1 |
| Katharina Thalbach | Giggi | 1 |
| Franz Rudnick | Prof. Brucker | 1 |
| Ulrich Noethen | Ludwig Hellmann | 1 |
| Christian Redl | Leo Passlack | 1 |
| Hans Peter Hallwachs | Carl Polzer | 1 |
| Maria Perschy | Vermieterin | 1 |
| Alexander Held | 1 | |
| Friedrich von Thun | Friedrich Rhomberg | 1 |
| Suzanne von Borsody | Frau Kreidler | 1 |
| Sissy Höfferer | Hannelore Illgner | 1 |
| Klaus J. Behrendt | Dr. Clement | 1 |
| Dietmar Schönherr | Julius Herzfeld | 1 |
| Hartmut Becker | Eberhard Grunewald | 1 |
| Isolde Barth | 1 | |
| László I. Kish | Richard Zerweck | 1 |
| Axel Milberg | Arno Möller | 1 |
| Ulrike Kriener | Sibylle Quirini | 1 |
| Manfred Zapatka | Kinscher | 1 |
| Christoph M. Ohrt | 1 | |
| Bernadette Heerwagen | Anja Thaler | 1 |
| Max Tidof | Gerd H. Poltisch | 1 |
| Gila von Weitershausen | Renate Rhomberg | 1 |
| Frank Giering | Joseph Herzfeld | 1 |
| Markus Knüfken | Leonhard Keller | 1 |
| Jacques Breuer | Conny Bialas | 1 |
| Jeannette Arndt | Nicole Kost | 1 |
| Jürgen Hentsch | Professor Schultes | 1 |
| Heikko Deutschmann | Guenter Kress | 1 |
| Pierre Franckh | 1 | |
| Christine Neubauer | Caroline | 1 |
| Oliver Stritzel | Klaus-Jürgen Heymann | 1 |
| Juliane Köhler | Agnes Hellmann | 1 |