Jean Simmons as Judith

David Farrar as Bill

James Donald as Alan

Herbert Lom as Rahman

Bernard Lee as Inspector Grey

Harcourt Williams as Dr. Kearn

Maria Mauban as Antoinette

Grégoire Aslan as Duport

Gladys Henson as Waddy

Madeleine Lebeau as Marie

Léo Ferré as Victor

George Benson as Assistant Registrar

Martin Boddey as Adams

Arthur Hambling as Jenkins

Campbell Singer as A Policeman

Guy Verney as George