Doctor Who 101: What is the TARDIS? And then the End of Time

David Tennant explains the TARDIS for a new American audience. I suppose those of us -- even Americans -- that have watched the show forever take it for granted. But not everyone.



If you're an old hand to the series, this trailer [thanks Blogtor Who] will be even more exciting, as we count the days until The Waters of Mars airs this week, and the first part of The End of Time next week!