Just saw this on the excellent Talking Pictures channel (UK, old films and TV). I'd seen the originals in the 60s too.
THIS story was also an episode in the Rowan Atkinson series, an inferior Maigret - but better production values (as expected in the 2010s!) and clearly a bigger budget.
The other review on here, by Prismark, saw the same thing as me, but doesn't allow for the running time being just an hour in this old series, this being a complex story for that timing. It also mention Solon getting hurt, well, he WAS -- he actually did the stunt himself, had probably said he'd be fine -- but he could have been acting of course!
This series makes a lot of Magistrate Comeliau, even mentioning the differences with British procedure. The TV makes Comeliau a bit of a comedy aspect, not really how he is portrayed in the books.
The reference to "dark, violent" also takes no account of what executives would put on TV back then -- it WAS the 60s?!!! The shootout was little different to those seen on many TV shows back then, but the overall episode was good -- maybe other viewers noticed that the bar interior was exactly the same set as that in the canal body episode, a few weeks ago?!! Though the budget for this series 2 was clearly a bit higher (far more exterior shots), it certainly wasn't unlimited!!