So after a few comments from here I have nearly completed the two series for Dark on Netflix.
Its great and worthy of its 8.7 rating on IMDB!
It is in German so is subtitled and I know that will put a lot of people off. Thats a shame as its well worth the (small) effort. Its a show you have to absorb and think about, which I think is why I like it.
Thanks to those before me who recommended it!