Guest Stars Helen Shingler as Mme. Maigret Neville Jason as Lapointe Stratford Johns as Keller Harold Scott as Dr. Pardon Terry Scully as Emile Paulus Carl Bernard as Foucrier Sheila Burrell as Francoise Bourcicault Betty Baskcomb as Mlle. Clement Endre Muller as Vamos Penny Morrell as Blanche Dubit Margo Cunningham as Madame Keller