| Actor | Role |
|---|---|
 Peter SattmannFrank Ahrend | Frank Ahrend |
 Nina HogerPetra Voss | Petra Voss |
 Siegfried W. KernenDr. Unger | Dr. Unger |
 Rolf HoppeProfessor Siedlach | Professor Siedlach |
 Hans Peter HallwachsNot listed | Not listed |
 Udo SchenkNot listed | Not listed |
 Ulrich von DobschützNot listed | Not listed |
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