Eager to spend the summer at camp, the young Jönsson gang finds itself instead at a punitive, hardscrabble institution run by their archenemy.
Conrad Cronhem
as Charles-Ingvar "Sickan" Jönsson
Buster Söderström
as Ragnar Vanheden
Anton Pettersson
as Dynamite - Harry
Maja Dosthe
as Doris
Max Holmstrand
as Wall-Enberg Junior
Hampus Andersson-Gill
as Biffen
Loa Falkman
as Director Wall-Enberg
Cecilia Ljung
as Miss Rask
Pia Johansson
as Märta Gabrielsson
Leif Andrée
as Professor Rixil
Tommy Andersson
as Miss Fridh
Sten Ljunggren
as Janitor
