Finale definitely felt like a film for much of the episode. Impressive conclusion, although I wasn't a big fan of the Columbo/Knives Out style "summation gathering" trope scene where everything is explained; not because I dislike the trope, I just didn't like the way it was done (no banter between multiple characters who I would have loved to converse). There was at least some fun humor there, with the Canadian who clearly was not Canadian lol.
Really, REALLY enjoyed this show. The southern France setting was beautiful and boy did that town come alive in a way you rarely see in any show or film. The streets, the countryside, the cafe...beautiful.