Just saw this on the Talking Pictures channel (UK, old films and TV shows). 2nd episode in series 2, and excellent it was too.
A nice story, cleverly told, with several twists and turns. Decent level of acting too, a fairly early appearance for George Baker, who'd go on to be in I Claudius, amongst many others.
This show introduced viewers to Comeliau, the examining magistrate (part of the French legal system, who can help or hinder the police?!).
Simenon treats this character as almost comedy, in many books, but it enables the shows to have an extra element. More outside filming too, in this one, all added to the atmosphere.
Also Torrence appeared, a regular in the books in Maigret's team - almost a dogsbody?! - but it showed the budget had increased.
And finally Maigret gets his man - or was it woman?!
Great stuff, looking forward to the next one!