| Name | Character | Episodes |
|---|---|---|
| Erhan Emre | Dr. Sebastian Krüger | 12 |
| Clemens Schick | Marco Lorenz | 12 |
| Alexandra Neldel | Dr. Anna Winter | 12 |
| Tom Wlaschiha | Endres | 1 |
| Heiner Lauterbach | Robert Keller | 1 |
| Dirk Martens | Max Trautmann | 1 |
| Erdal Yıldız | Faris Jezari | 1 |
| Klaus J. Behrendt | Jörg Naumann | 1 |
| Thomas Darchinger | Fotograf Johannes | 1 |
| Wilfried Hochholdinger | Dr. Kölmel | 1 |
| Catherine Flemming | Zahra Trautmann | 1 |
| Udo Schenk | Prof. Albrecht Hildebrandt | 1 |
| Alexander Beyer | Timotheus Wolf | 1 |
| Hans Martin Stier | Thiery van Houten | 1 |
| Claudine Wilde | Beate Simons | 1 |
| Ronald Kukulies | Dorn | 1 |
| Jörg Hartmann | Rechtsanwalt Georgen | 1 |
| Iris Böhm | Katharina Beck | 1 |
| Max Volkert Martens | Prof. Hanno Manstein | 1 |
| Sylta Fee Wegmann | Jaqueline | 1 |
| Barbara Schöne | Margareta Kempa | 1 |
| Tom Jahn | Peter Schmitz | 1 |
| Heikko Deutschmann | Mario Wernicke | 1 |
| Boris Aljinovic | Bernd Wolter | 1 |
| Bernd Stegemann | Herr Karl | 1 |
| Jochen Kolenda | Claus Breidenbach | 1 |