Dark plays with the viewer's mind a lot even if they are paying attention. I mean it leaves you thinking a lot and then the conclusions start to come. On some occasions I had to go back a few minutes to be sure what was going on. However I watched all 3 seasons and thought they were great. A series that hooked me from the beginning to the end.
Sic mundus creatus est!
yeah, i found myself rewinding quite a bit as well, especially when we would have no clear indication as to what time period we were currently in and which version of which person we were currently dealing with. I still haven't finished season 3 and I have to make sure I have a clear mind and am totally sober while watching it otherwise i will miss some very important details.