Dear Mr. Potter, The Ministry has received intelligence that at 6:23 this evening you performed the Patronus Charm in the presence of a Muggle. As a clear violation of of the decree for the reasonable restriction of underage sorcery, you are hereby expelled from Hogwart's School of Witchcraft and Wizardry.
There's one thing I always meant to ask Jack, back in the old days. I wanted to know about that Doctor of his... the man who appears out of nowhere and saves the world, except sometimes he doesn't. All those times in history when there was no sign of him, I wanted to know why not. But I don't need to ask anymore. I know the answer now. Sometimes the Doctor must look at this planet and turn away in shame.