| Name | Character | Episodes |
|---|---|---|
| Jophi Ries | Chefingenieur Fritz Kaiser | 9 |
| Jürgen Tarrach | Maschinist Wysocki | 9 |
| Waldemar Kobus | Manne Erdmann | 1 |
| Mark Zak | Sergej | 1 |
| Hary Prinz | Jean Lecaux | 1 |
| Armin Dillenberger | Paulsen | 1 |
| László I. Kish | Oliver Droll | 1 |
| Günther Kaufmann | Fred | 1 |
| Andrzej Grabowski | Eike | 1 |
| Jochen Nickel | 1 | |
| Melika Foroutan | 1 | |
| Anne Kasprik | Ina | 1 |
| Wolf-Dietrich Sprenger | H. P. Jaschke | 1 |
| Orso Maria Guerrini | Dottore Alfano | 1 |
| Vitus Zeplichal | Petersen | 1 |
| Andrzej Blumenfeld | Siletzki | 1 |
| Max Volkert Martens | Professor Kretschmar | 1 |
| Nele Mueller-Stöfen | Dr. Isabel Kersten | 1 |
| Errol Trotman-Harewood | Mr. Kay | 1 |
| Maynard Eziashi | N. P. Sembene | 1 |
| Götz Schubert | Dr. Schröter | 1 |
| Hussi Kutlucan | Yuan | 1 |
| Wolf-Dietrich Berg | Oberst Herrlich | 1 |
| Christine Neubauer | Beate Wollitz | 1 |
| Oliver Stritzel | Kapitän Davidson | 1 |
| Giuliana De Sio | Dr. Sophia Minardi | 1 |
| Jophi Ries | Fritz Kaiser | 0 |
| Jürgen Tarrach | Wysocki | 0 |