James Mason

Peter Vadassy

Lucie Mannheim

Mme Suzanne Koch

Raymond Lovell

Robert Duclos

Julien Mitchell

Michel Beghin, intelligence chief

Herbert Lom

Andre Roux

Martin Miller

Walter Vogel

Frederick Valk

Emil Schimler, alias Paul Heimberger

Patricia Medina

Odette Roux

Anthony Shaw

Major Anthony Chandon-Hartley

Laurence Hanray

Police Commissioner

Valentine Dyall

Warren Skelton

Patricia Hayes

Woman

Ivor Barnard

P. Molon, chemist

John Baker

Policeman

Victor Rietti

Restaurant Owner

Hugo Schuster

Inspector