According to Robert Lewis, "It was easy to define the position held by Charlie Chaplin in the making of 'Monsieur Verdoux'. He was everything--writer, star, director, producer and casting director, as well as supervisor of all other departments: costumes, scenery, make-up, lighting, shooting schedules, camera set-ups, and the musical score. He also crawled around on the floor with a knife, scraping up bits of old chewing gum stuck to the floor. For good measure he'd entertain the troops between shots with hilarious imitations, such as William Gillette's inanimate playing in "Sherlock Holmes," a Kabuki actor pounding his feet on the floor, and crossing his eyes with pain, or Maurice Schwartz, the Yiddish actor, intoning a speech while twirling an imaginary beard that went clear to the floor."