Eric Portman

Fernand Maubert

Guy Rolfe

Philippe Lodocq

Nadia Gray

Madeleine Saincaize

George Cole

Marc, detective

Harold Lang

Belfort, the pickpocket

Edward Chapman

Minister for War

Maurice Denham

Colonel de la Roche

John Carol

Jean Louis / Alfred Louis

May Hallatt

Monique

Arthur Lowe

Town Clerk

Sebastian Cabot

Prefect

Jeremy Spenser

Jacques

Madge Brindley

Jacques' Grandmother

Hattie Jacques

Barmaid (uncredited)

John Salew

Minister's Secretary

Robert Hamer