Lars Hanson

Victor Barring

Gunnel Broström

Eva Barring

Olof Bergström

Arne Hedberg

Nils Dahlgren

Harald Barring

Anna Lindahl

Margit Barring

Arne Ragneborn

Bengt

Georg Funkquist

Dr. Kanzel

Wiktor Andersson

Ekman

David Erikson

Ewers

Erik Rosén

Chief Physician

Magnus Kesster

Kanzel's Henchman

Harry Ahlin

Kanzel's Henchman

Sven Bergvall

Member of Royal Academy of Sciences

Britta Billsten

Lab Assistant (uncredited)

Erland Colliander

Man at the Peace Meeting (uncredited)

Göran Gentele