Cast
- Otto Mellies as Dr. Martin Schlüter
- Hans-Peter Minetti as Ernst Demmin
- Günter Grabbert as Wolfgang Jonkers
- Larisa Luzhina as Irene Demmin
- Gerd Biewer as Prof. Mahnel
- Walter Lendrich as Dr. 'Marabu' Seibt
- Christoph Engel as Storch
- Eva-Maria Hagen as Felicia Vahlberg