Whoops. As you might have heard, the Beeb cocked up and accidentally sent out the Blu-Ray release of this half-season of Doctor Who before the finale aired. That meant 210 fans had the potential to spoil everything on web sites, Twitter, et al. But they didn't. Even though John Hurt had already spoiled most of it himself. Well done them.
To reward them, the BBC has released this shiny clip of Matt Smith and David Tennant chatting away about the anniversary special, due on November 23rd. I wonder what David Tennant's advice was.