Klaus Schwarzkopf as Professor Kolczyk

Elke Sommer as Miezi

Jürgen Prochnow as Bernd Ziegenhals

Ulla Jacobsson as Reinhild Kolczyk

Kristina Nel as Ginny Kolczyk

Walter Gross as Opa Melzer

Anita Kupsch as Sekretärin

Berta Drews as Mutter Braats

Otto Sander as Rulle Ruhlsdorff

Claus Theo Gärtner as Kronert

Peter Schiff as Kommissar Rannow

Ortrud Beginnen as Babsy

Wolf Roth as Hohenberg

Fritz Tillmann as Dr. Sievers

Tilo Prückner as Drögnitz

Gunther Beth as Kronert

Ulrich Bödecker as

Max Giese as

Gerhard Wollner as