If you're looking for series similar to Dark on Netflix, I'd definitely recommend checking out The OA. It has the same mind-bending, mysterious vibe with a mix of science fiction and supernatural elements. Another great option is Stranger Things—while it’s more focused on 80s nostalgia, it also has complex storylines and alternate dimensions. 1899 is also from the creators of Dark and carries the same intricate, puzzle-like storytelling. Have you watched any of these yet? What did you like most about Dark?