The following clip is a massive, massive spoiler for The Day of the Doctor, last weekend’s 50th anniversary special and – in my consideration – the best episode of Doctor Who I have ever seen. I’m feeling sure about that now, having thought about it quite a lot for nearly a week.
But… why this clip?
I guess they’re underlining it for us. This new drive for The Doctor will likely come to define the upcoming episodes, at Christmas and beyond. This is a very meaningful way to trail where they’re going without showing us anything new, I’d suppose.