“Monsieur”
“See Monsieur Geborand, buying a pennyworth of paradise.”
“Evil never goes unpunished, Monsieur. But the punishment is sometimes secret.”
“Pardonnez-moi, monsieur. Je ne l’ai pas fait exprès”
“Vous faites de la musique, Monsieur. Vous n'êtes pas musicien.”
“Excuse me, Monsieur Poirot. If you'd like to ask any questions, I'm sure the doctor wouldn't mind.Of course not. Of course not. Great admirer of yours, Monsieur Poirot. Little gray cells -- order and method. I know all about it.”