The BBC's official website for Doctor Who was today updated with the sixth 'door' on their Advent calendar, due to the fact that today is December the sixth. Inside today's door is the first part of a story written exclusively for the official Doctor Who website by Mark B. Oliver, entitled The Advent of Fear, which consists of four web pages of original fiction. The story inside today's 'door' on the Advent calendar can be read by clicking here. The seventh door on this year's Doctor Who Christmas countdown calendar will be available to open from tomorrow exclusively on the official Doctor Who website. What do you think of this exclusive new Doctor Who story?