
Sickan, the cunning leader of the Jönsson gang, is confined in a mental institution where Dr. M.A. Busé, fascinated by Sickan’s crime handbook, takes an interest. Pressured by the ruthless banker Wall‑Enberg, Dr. Busé joins forces with Sickan’s loyal partners Vanheden and Dynamite‑Harry to execute Sickan’s elaborate plan to steal the priceless Romanov Black Diamond from the National Museum.
Does The Jönsson Gang & the Black Diamond have end credit scenes?
No!
The Jönsson Gang & the Black Diamond does not have end credit scenes. You can leave when the credits roll.
Explore the complete cast of The Jönsson Gang & the Black Diamond, including both lead and supporting actors. Learn who plays each character, discover their past roles and achievements, and find out what makes this ensemble cast stand out in the world of film and television.

Björn Granath
Lohman

Peter Haber
Dr. Max Adrian Busé

Ulf Brunnberg
Ragnar Vanheden

Rikard Wolff
Count Romanoff

Jan Mybrand
Keeper

Lena T. Hansson
Busé's secretary

Ulf Friberg

Björn Gustafson
Dynamit-Harry

Jonas Uddenmyr
Guard

Suzanne Ernrup

Hans Åke Gabrielsson

Pontus Gustafsson
Andersson

Thomas Segerström
Guard

Birgitta Andersson
Doris

Per Grundén
Wall-Enberg

Weiron Holmberg
Biffen Johansson

Bernt Lindqvist
The Chief of Police

Kjell-Hugo Grandin

Sten Hellström
Patient

Karl Erik Andersen
Jailer

Marianne Karlbeck

Elias Ringquist
Lillis

Ulf Eriksson
Patient
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