@James Spader ^ this, extraordinarily well written and for the complexity involved they don't get lazy with details or plot consistency. Because of course not, they're German, and Germans don't break rules and they engineer perfect things.
I will say, you absolutely cannot half-watch this show (I'm guilty of this with a lot of shows - farting around on the web while wathcing). You can't be on your phone surfing SR during this show, you have to pay attention the entire time or you'll miss stuff. But it's not hard to do, it'll keep your attention.