Just released today is a short video that’s a prequel to the forthcoming Doctor Who episode Let’s Kill Hitler, which is almost certainly going to be shown on Saturday 27 August. It’s been specially written by Steven Moffat, and will not be shown on TV. Well, it probably will at some point, but it won’t be part of the episode. In much the expected manner, it manages to be wacky, emotional and vaguely disturbing. It’s embedded below, but if that doesn’t work, you can see it on the BBC site.