For those who aren’t familiar with Gossip Girl , let me enlighten you: 121 episodes of a skilfully crafted, dramatic masterclass. The addictive show follows teenage billionaires Chuck, Nate, Blair and Serena as they navigate the skyline of New York’s 2007-2012 Upper East Side. Without giving away too much for those who have somehow survived (surely with difficulty) without seeing Blake Lively repeatedly muttering 'I have to go' upon their screen, Gossip Girl beholds affairs