[The flash of the future for the Doctor comes in a different way than for most. For a start, rather than a single scene, it appears to be a few extremely quick flashes, not all of them accompanied by images but sometimes just voices.
A woman's voice, worried but final-sounding:] You be careful now. Because your song is ending, sir.
[And this changes quickly to an image of the Doctor himself, in an orange spacesuit, looking furious:] They said I was gonna die. They said "he will knock four times" and I think I know what that means, and it doesn't mean right here right now, 'cause I don't hear anyone knocking, do you?!
[And again, the scene shifts, but this time there's no sound. To anyone who knows the Doctor or the TARDIS, they might recognise the surroundings as the TARDIS wardrobe room. An
unknown man stands in front of the mirror in there, straightening a bow tie rather nervously before the image simply melts away.]
[END VIDEO +++ BEGIN VOICE POST FUNCTION]
[the Doctor is quiet for a long while before he mutters one word.] ... Spoilers.