Sickan, the leader of the criminal Jönsson gang is incarcerated in a mental institution, attended by Dr M.A. Busé, who admire a handbook in crime that Sickan has been writing. Blackmailed by the nefarious banker Wall-Enberg, Dr Busé and Sickan's partners Vanheden and Dynamite-Harry execute Sickan's plan of stealing the valuable Black Diamond of the Romanovs from the National Museum.
DirectorHans Åke Gabrielsson
WritersHans Åke Gabrielsson, Rolf Börjlind
Part of
Includes: Beware of the Jönsson Gang, The Jönsson Gang & Dynamite Harry, The Jönsson Gang Gets Gold Fever, The Jönsson Gang Turns Up Again, The Jönsson Gang in Mallorca, Jönssonligan & den svarta diamanten, The Jönsson Gang's Greatest Robbery, The Jönsson Gang at High Stakes, The Jönsson Gang at High Stakes, The Jönsson Gang - The Master Plan, The Jonsson Gang, The Jönsson Gang Returns, Jönssonligan & Wall Enberg
