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 on Tuesday. The advent calendar will feature many exclusive treats over the next twenty one days and door number four on the calendar is now available to open due to the fact that today is the fourth of December. Behind the door, there are four new Doctor Who idents for BBC One and you can view these new videos here whereas content from behind the first three doors of the advent calendar can be found here, here and here in previous posts. This year's fifth door on the calendar will be available to open sometime tomorrow afternoon and details regarding the next special advent treat will be posted on this site soon. What do you think of these new Doctor Who idents for BBC One?