Gösta Ekman as Martin Beck

Kjell Bergqvist as Lennart Kollberg

Rolf Lassgård as Gunvald Larsson

Niklas Hjulström as Benny Skacke

Lena Nilsson as Åsa Thorell

Ingvar Andersson as Per Månsson

Bernt Ström as Einar Rönn

Torgny Anderberg as Evald Hammar

Jacob Nordenson as Folke Bengtsson

Anita Ekström as Inga Beck

Tova Magnusson as Putte Beck

Agneta Ekmanner as Greta Hjelm

P.G. Hylén as Kristiansson

Barbro Hiort af Ornäs as Colonel's wife

Wallis Grahn as Göta Isaksson

Inga Sarri as Karin Larsson's mother

Tove Edfeldt as Girl with a fishing rod

Victor Ginner as Erik Beck

Anna Helena Bergendal as Roseanna

Donald Högberg as Karl Åke Eriksson

Birger Österberg as Kvant

Tom Younger as Inspector Kafka

Hans Ullberg as The colonel

Chris Torch as Mylvaney

Ivan Mathias Petersson as Man in a wheelchair (uncredited)

Maj Sjöwall as Police Secretary in Motala (uncredited)