Writing in the latest issue of Doctor Who Magazine, Russell T Davies confirms that the preview of the Christmas special, to be shown on this year's Children in Need programme, will not be the pre-titles sequence, but rather a specially packaged clip from the story. This is because the pre-titles sequence from the story is too plot-heavy to work as a standalone preview.
The title of David Tennant's penultimate episode has still not been revealed, but according to Davies it will be six words long, the longest title yet. Final casting for the final episodes took place as late as October, when what is described as a "wonderful and distinguished" Hollywood actor provided the voice for one of the aliens in the story. The voice will be used in the trail for the Christmas episodes which will air directly after The Waters of Mars.
In the run up to the UK showing of The Waters of Mars, David Tennant has been co-hosting the breakfast programme on Absolute Radio. To celebrate the fact, the station mocked up a TARDIS façade for the front of the station.
In the first programme Tennant announced that he is to auction off his own bed live, which is in is own words "a nasty old bed that's seen some action." All proceeds of the auction will be going to Children in Need.
Tennant will be with the programme for the rest of the week, and a podcast of the first programme can be heard via the Absolute Radio website, along with a photo gallery and a video diary.