Writer Johannes Pfeiffer who goes undercover as a student in a high school after his friends told him that he missed out on a great life experience since he was home schooled.

Heinz Rühmann
as Dr. Johannes Pfeiffer/Hans Pfeiffer

Karin Himboldt
as Eva Knauer

Hilde Sessak
as Marion

Erich Ponto
as Professor Crey, genannt Schnauz

Paul Henckels
as Professor Bömmel

Hans Leibelt
as Gymnasialdirektor Knauer, genannt Zeus

Lutz Götz
as Oberlehrer Dr. Brett

Hans Richter
as Rosen

Clemens Hasse
as Rudi Knebel

Rudi Schippel
as Streber Luck