| Name | Character | Episodes |
|---|---|---|
| Eva Pflug | Mathilde Warburg | 27 |
| Stefan Gubser | Dr. Klaus Tannert | 27 |
| Karl Michael Vogler | Prof. Dr. Bernhardt | 27 |
| Wookie Mayer | Gaby Warburg | 27 |
| Ulrich Matschoss | Alex Simon | 1 |
| Ralf Wolter | 1 | |
| Dietrich Mattausch | 1 | |
| Sissy Höfferer | Andrea Ulbrich | 1 |
| Wolfram Berger | Volker Krieger | 1 |
| Isolde Barth | Claudia Strehle | 1 |
| Philipp Moog | Niklas Baumann | 1 |
| Klaus-Peter Thiele | Wolfgang Handke | 1 |
| Udo Schenk | Uwe Mallek | 1 |
| Gert Haucke | Alexander Kollmann | 1 |
| Julia Richter | Pamela Tiersch | 1 |
| Katrin Sass | Petra Kaars | 1 |
| Anne Kasprik | Sandra Fischer | 1 |
| Manfred Lehmann | Hermann Tiersch | 1 |
| Mathias Herrmann | Sven Bachmann | 1 |
| Elisabeth Wiedemann | 1 | |
| Siemen Rühaak | Dr. Lukas Becker | 1 |
| Jürgen Schornagel | Erwin Fischer | 1 |
| Tayfun Bademsoy | 1 | |
| Steffen Münster | Dodo Nickels | 1 |
| Emilio De Marchi | Gellert | 1 |