Since Benno Geyer fails to pass his Abitur due to his panicky exam anxiety, Dr. Fritz Geyer enrolls in high school under his brother's name. As a model student, he has no trouble getting good grades, but he quickly becomes unpopular among the students. From then on, he tries to impress with the craziest pranks.
Peter AlexanderDr. Fritz Geyer
Cornelia FroboessReny Pacher
Gunther PhilippDr. Erwin Berthold
Gusti WolfFrl. Puppernick, Sekretärin
Wolfgang JansenBenno Geyer
Rudolf CarlErich PacherElisabeth EppMathilde Pacher
Joseph EggerDienstmann
Adrienne GessnerElisabeth GeyerFranz StoßProf. KrammOtto LoeweDr. OberwasserEdith SteinacherUschi, Bennos FreundinFranz ElkinsPepi, ein Lausbub
Theo LingenProf. Dr. LiebreichRosl DorenaAnna, Haushälterin