Guest Stars Helen Shingler as Mme. Maigret Neville Jason as Lapointe Fanny Carby as Concierge Christopher Coll as Police Officer George Roubicek as Daniel Arthur Lowe as Monsieur Triboulet June Ellis as Madame Loubet Michael Mellinger as Jean Bouchet Alfred Burke as Police Officer Lecoeur James Maxwell as Olivier Lecoeur Fred Ferris as Monsieur Guillaume George Roderick as Gaston Loubet Manning Wilson as Godin Michael Phillips as Francois Lecoeur