Georg Rydeberg
— Hans Brede
Karin Ekelund
— Kristina Brede
Åke Ohberg
— Jan Almer
Börje Mellvig
— Docent Högberg
Anders Frithiof
— Director General Lind
Signe Wirff
— Miss Borg
Ivar Kåge
— The Doctor
Sten Hedlund
— Major Högberg
Gun Adler
— Nurse in Brede's Home (uncredited)
Gerda Björne
— Woman at the Party (uncredited)
Karl Borg
— Doctor (uncredited)
Edvard Danielsson
— Priest (uncredited)
Solveig Ekelund
— Woman in Laboratory (uncredited)
Åke Engfeldt
— Dancing Partner (uncredited)
David Erikson
— Beckman, Engineer (uncredited)
Margareta Fahlén
— Woman at the Party (uncredited)
Arthur Fischer
— Doctor (uncredited)
Erik Forslund
— Gardener (uncredited)
Gösta Grip
— Man in Laboratory (uncredited)
Helga Hallén
— Nurse (uncredited)
Ann-Marie Hellgren
— Nurse (uncredited)
Mary Hjelte
— Nurse (uncredited)
Douglas Håge
— Ticket Salesman (uncredited)
Lillebil Kjellén
— Woman at the Party (uncredited)
Birgit Linder
— Woman in Laboratory (uncredited)
Millan Lyxell
— Nurse (uncredited)
Rolf Sandberg
— Man in Laboratory (uncredited)
Bert Sorbon
— Man in Laboratory (uncredited)
Nils von Brömssen
— Doctor (uncredited)
Eric von Gegerfelt
— Man in Laboratory (uncredited)