Today is the third of December and door three is now available to open on the BBC's official Doctor Who advent calendar. Behind the door is a video interview with Collum Sanson-Regan who works on Doctor Who as David Tennant's body double. The interview can be viewed below;

Collum has worked on Doctor Who on many occasions and most recently doubled as The Doctor in the final episode of Doctor Who series four, Journey's End, which saw David Tennant play two different characters. As well as being available on this site, the video interview with Collum can also be viewed here on the BBC's official Doctor Who website.