Doctor Who: 12 Unanswered Questions From Last Christmas

Santa Claus joined forces with the Doctor and Clara Oswald in this year's Doctor Who Christmas Special and it's safe to say that he well and truly left his mark on the lives of the characters he encountered. Last Christmas saw an Arctic base under siege and our heroes faced a race against the clock to save their own minds from the grasp of the terrifying Dream Crabs. In true Doctor Who style it was a high octane adventure filled with all the usual twists and turns that fans have come to expect from a festive escapade but it's also left us with its fair share of unanswered questions which will no doubt remain at the forefront of Whovian discussion until the series returns to our screens next year and possibly even beyond. Questions, for example, such as how did all of the characters end up in the same dream in the first place and why is Clara seemingly now living in a new house that's twice the size of her previous abode? There's no definitive answers to this questions but this list has attempted to cast a light on some of the episode's various mysteries to provide satisfying explanations so you're not keeping yourself up at night. But you still probably will. Without much further ado, let's get started! Obvious spoiler warning if you haven't seen the episode yet. You have been warned...