I am a native French speaker and speak English quite well, so I looked at the version with both languages.
This is not a action series. Spielberg fans, go your way! So we have here a free adaptation of H. G. Wells' novel, which I read a number of years ago, and we must remember that the 2005 movie was too. The story is interesting and includes a British and French cast, which is new to me. We find the progression of 3 groups of people in this post-apocalyptic world between the Alps and London who are trying to find meaning in what happened to humanity after the surprise attack of the 1st episode. The motivations of the main characters are divided between pure survival, the search for relatives and the search for reasons and justifications for the attack rather than eradicating the invader.
Concerning the scenario, it was chosen to unfold the story in a rather intimate way by focusing only on the 3 groups as well as to develop some personal aspects, sometimes too much. I would perhaps have preferred to see more references to human nature (selfishness, individualism...),which was criticised by H.G. Wells, there are a few but not many. On the other hand, I have noted some inconsistencies concerning travels, sometimes too fast, and one or two script inconsistencies that sound weird.
For the realization, we will also note the profusion of plans with the dead people on the ground which reinforces this feeling of "alone in the world " The dominant colour in the different shots remains grey which is common in Canal+ series.
The acting is often good but I have a lot of trouble with Léa Drucker and we will also notice from time to time some unconvincing dialogue.
The soundtrack is minimalist and unpretentious and it should be remembered that it is not a blockbuster, that it is useless to put epic music on a series that wants to be cold and dark. Not everyone will like it, but it was enough for me.
As for the last scene, although it is surprising, I was expecting it with the rare clues crumbled during these 8 episodes.