I had this recorded but looking at the reviews I nearly didn't bother - (I'm French living abroad for the record)
A lot of French series have left me cold, particularly The Revenants, a boring piece where every female character seems only fit to break nails or whinge on a manly man's shoulder - and this was compared unfavourably to it.
Anyway I'm glad I gave it a try anyway. It's a paranormal psychological thriller, with an ecological theme I suppose. The characters are maybe a bit clichéd, but they are well developed* and evolve accordingly. Like real French people, with French lives, French concerns and problems.
There is excellent suspense throughout - I'm itching to see the last two episodes. It's absolutely nothing to do with a soap like someone said.
Another said it's unbelievable the whole of France wouldn't be there gawking, with social media and all, but really, what is there for the media to get excited about?? A funny cloud, such as get 3k lackadaisical likes on Facebook, and ten people missing for a few hours but found again. No, no outsider would see anything bizarre. Yet bizarre it certainly is.
There's also nothing wrong with any of the acting. Some people just can't cope with subtitles or anything different. It's the "act like real people" school of series, and they are believable as real people. And the lead actor is excellent.
*through the nature of the plot and what's happening, they all experience extreme changes in their lives and behaviour. This is very well done. But you'll have to watch a bit more than one episode.
Personally I highly recommend. And it's really easy viewing, don't expect boring intense intellectual stuff à la Nouvelle Vague: it's France télévision series made for family evening viewing (bear in mind there is a normal French level of sex and partial nudity: it's important to the plot anyway)
7¾