Guest Stars Helen Shingler as Mme. Maigret Sheila Ballantine as Raymonde John Moore as Blanchard Marjorie Wilde as Leontine David Grahame as Monsieur Lachaume Robert Young as Court Usher Peter Thompson as Warder Alan Wheatley as Grandmaison Edward Chapman as Hubert Vernoux Alan Rowe as Alain Vernoux Charles Maunsell as Arsene Patrick Scanlan as Clerk Philip Howard as Cafe Proprietor Jon Rumney as Lomel Henry Manning as A Doctor Wynne Clark as Madame Chabot Margaret Rawlings as Madame Vernoux John Caesar as Labourer Julian d'Albie as Robert de Courcon Shirley Cain as Jeanne Vernoux Norman Scace as Inspector Feron Ray Grover as Man in the Cafe Reginald Jessup as Richet
