Where does TMDB show me which streaming services Mr.Robot, say, is currently available on? It gives the producing network, catalogue details, all that, but I can't find the details of its availability on Netflix/NowTV/Sky/AmazonPrimeInstant/etc.?
It doesn't. You'd have to scrape a site that had that data or check to see if they have an API. I believe there are sites that do this but as it wasn't core functionality of the MVP anyway we didn't focus on it too much.