Saw this on Talking Pictures channel (UK - old films and TV) who are running all 4 of the original Maigret series (BBC, early 60s). The other present review says "rewardingly complicated", but I did wonder if the book plot (& I hadn't read this one) had been chopped a bit too hard to fit the TV running time (an hour for these, longer for all subsequent versions)?
I couldn't quite see why one suspect (the heir to the murdered woman's fortune) had committed suicide? It was hardly obvious then how much he'd been involved, and Maigret & Lucas discussed what his motive was later, they were puzzled too!
The acting was fine in this one, Anton Rodgers in an early role, and solid performances elsewhere, but the scenery was as usual not so solid, several doors closing caused the walls to shake!
The plot also glossed over Lucas being bashed over the head with a soda syphon - by the suspect he was following - but he was in the next scene as though nothing had happened. No hint of a bandage even?!
Maigret as ever pieced together what had happened, but at the end there was a further plot glitch, the chap who'd appeared guilty at the outset was told he could go, just a minor charge of trying to burgle the house where the murder happened. Nobody thought to charge him with assaulting poor Lucas? Bizarre!