The Duke: Sven Miliander
Dr. Grimthorpe: Semmy Friedmann
Reverend Cyril Smith: Tore Lindwall
Morris Carleon: Herman Ahlsell
Patricia Carleon: Gertrud Fridh
The Stranger/Magician: Anders Ek
Hastings, The Duke's secretary: Claes Thelander

Playwright: G.K. Chesterton
Director: Ingmar Bergman
Stage Design: Carl-Johan Ström