Inside the Social Network: Facebook's Difficult Year, BBC Two review - how big can it get?
A force for good or Big Brother in the making?
Not everybody is on Facebook, yet. So far, Mark Zuckerberg’s social media monolith has only managed to scrape together about 2.3 billion users, roughly one-third of the planet. But as this fascinating documentary revealed, Facebook’s plans are huge and its ambitions boundless.