Guest Stars Helen Shingler as Mme. Maigret Dandy Nichols as Concierge Ian Keill as Waiter Hilda Kriseman as Maid Harold Scott as Dr. Pardon Cecil Brock as Receptionist David Webb as Alain Margaretta Scott as Mme. Debul John Scott Martin as Cloakroom Attendant Robert Hunter as Grimal Campbell Singer as Inspector Pyke Peter Stephens as Baron Lagrange Susan Burnett as Georgette
