This is so beautifully shot it's surprising to watch. Even the first scene, as Spade looks at a house uphill and the cameraman shoots him from below, so we're also looking up at Spade...is a surreal experience. The location does help, but oh, this is pretty to watch. Usually, period pieces from eras OTHER than the 60s or 70s are better done, but this one is as it should be; again, it probably helps that it's set in France. I don't even like France, and I've been there several times, but this makes me want to give it another go, but to a rural locale next time. In one episode, we are so drawn in to the character development and plot arcs that, by far, the only annoying issue here is the weekly episode release. Owen gives a good performance, but it's an ensemble piece and they are ALL phenomenal - this impresses me bc I knew none of them, came for him, stayed for them. Though there is a nude scene that I will be re-watching a FEW times. Thank you to the writers, producer, director, cameramen, crew: the pool scene is a gift to the world.
As to the noir mystery element, I've read this style of literature and watched these types of films for decades - and just wow. Please, money-people in the studios: more of THIS.