If you still haven't seen the last series of Gossip Girl yet then you might want to tune in to TG4. Blair, Chuck and Nate have a bit of a dilemma on their hands: Serena's disappeared off the radar again, and not even Gossip Girl can find her. You know what that means: Time for a road trip. Meanwhile Georgina and Dan are working on a scathing tell-all book that will send shockwaves through the Upper East Side. And if you still don't know who Gossip Girl is, stay tuned until the end of the series...