Doctor Who Season 4 preview teaser!

I have not yet watched the Doctor Who Christmas episode (tonight, my pretties, tonight), but it aired in England yesterday, and someone posted the Season 4 preview teaser on YouTube. I have no idea how long it will stay up, so watch while you can! NOTE: SPOILERS FOR SEASON 4 ARE IN THE TEASER! I mean, duh. I know, I post a lot about the show. But a lot of people find this blog searching for the show too, and since I love the Doctor (in a man crush way, as I have made very clear), I'll post the odd entry or two. It helped inspire me when I was a kid, and honestly, it still does now.