Mapping human interaction online is tricky. But new research from the U.K. of Facebook realtime data reveals a lot about how we watch TV in the digital age. The study found of all TV-related discussions taking place on mobile devices, 60 per cent happened as shows were actually airing. Some 2.5 million people in the U.S., for example, chatted through the final scene of Breaking Bad. The implications for TV advertising and Facebook are huge. Could this be a chance for Mark Zuckerberg to make even more money?