- Writer:
- Giles Cooper
- From the novel 'Tour de Force' by:
- Christianna Brand
- Production:
- Raymond Raikes The Storyteller: Gabriel Woolf
- Louvaine Barker (Louli), a novelist:
- Denise Bryer
- Fernando Gomez, a courier:
- Howard Marion-Crawford
- Helen Rodd:
- Marjorie Mars
- Miss Trapp:
- Madeleine Christie
- Inspector Cockrill:
- Norman Wooland
- Mr. Cecil of Christophe et Cie.,Couturiers:
- Heron Carvic
- Leo Rodd:
- Noel Johnson
- EI Gerente, Chief of Police in the Island of San Juan el Pirata:
- Philip Leaver
- Pepe, a Juanese guard:
- Armand Guinle
- Lollita:
- Eva Hussar
- Pacorro, a waiter:
- Harold Young
