sentences:  He also had experience filming in Paris, having worked there on adaptations of "Maigret" (1960–63) and other Georges Simenon stories for the BBC.Location filming took place in Paris between 30 April 1979 and 3 May 1979.It proved a difficult shoot as the dates coincided with the May Day holiday period, which meant that many of the locations chosen for filming were closed, necessitating considerable improvisation on the part of the cast and crew.