In preparation for Christmas and the premiere of this year's remaining Doctor Who specials, the BBC's official Doctor Who website launched their online advent calendar for 2009 last Tuesday. The advent calendar will feature many exclusive treats over the next seventeen days and door number eight on the calendar is now available to open due to the fact that today is the eighth of December. Behind today's door, there is a new behind the scenes video which takes a look at what happened Cassie and Jimmy after the events of Dreamland and this video can be viewed here. Content from behind the calendar's previous seven doors can be found here, here, here, here, here, here and here. This year's ninth door on the calendar will be available to open sometime tomorrow afternoon and details about the next advent treat will be posted on this site soon. What do you think of this video?