Great series. I'm watching the English-language version of it now with French subtitles and it's great. I can't remember when I watched something that passionately last, waiting for each Sunday installment on British TV. The beauty of it is, it's very realistic and human, spooky in a very believable way. How would you feel if your child or lover came back from the dead and you had to deal with all the problems of hiding them from all the friends and neighbors who were present at their funeral AND have to avoid the truth as the poor souls apparently don't realize they've been dead for years or decades!
I did knock off one point for the dialogue. I'm just not a big lover of "suspenseful" evasiveness when people just don't tell each other things because if they do, the mystery will end after just one episode! Sometimes I was on the verge of hurling something at the TV, so annoyed I was with the characters' constant ambiguities. I don't think I've heard one line of plain honest information in the whole film, it's all understatements, or alternatively something happens just when someone was about to say something important. To me, it's not suspense, it's sloppy manipulative dialogue. So one point off for that.
Otherwise, the actors are very good, the story is well-developed and the atmosphere is beautifully spooky. If realistic horror is your thing, this is definitely a film to watch.