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 Campbell Singer as Inspector Pyke Peter Stephens as Baron Lagrange David Webb as Alain Margaretta Scott as Mme. Debul John Scott Martin as Cloakroom Attendant Robert Hunter as Grimal Susan Burnett as Georgette
