The "Pierre Marton" who is part-credited with the screenplay is, in fact, Peter Stone, who had scripted Stanley Donen's previous film, Sciarada (1963). He was to use this pseudonym twice more in his career. "Marton" was the surname of his stepfather, George Marton, whilst the French word "pierre" can be either a name, meaning "Peter", or a noun, meaning "stone".

Film

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