Hansi Kraus as Pepe Nietnagel

Theo Lingen as Oberstudiendirektor Dr. Gottlieb Taft

Renate Roland as Denise Moreaux

Evelyn Opela as Helena Kersten, geb. Taft

Ilja Richter as Taft als Junge

Hans Korte as Professor Heinzerling

Rudolf Schündler as Oberstudienrat Dr. Arthur Knörz

Hans Terofal as Pedell Georg Bloch

Balduin Baas as Oberstudienrat Blaumeier

Ernst Stankovski as Dr. Kersten

Ernst H. Hilbich as Dr. Heidemann

Charlotte Witthauer as Frau Taft

Monika Dahlberg as Frl. Weidt

Anita Mally as Lydia

Lilo Schick as Frau Blaumeise

Bruno W. Pantel as Müller

Horst Pasderski as Polizist

Josef Moosholzer as Lehrer

Erich Fiedler as Ober