This is what an anniversary special should be: something that comments on how all things come to an end, or at least change. Hypocritical for a show that will never die? Perhaps. But eras of the show certainly do die. Runs come to a close. Arcs reach their conclusion. What a brilliant, beautiful idea from James Goss that the Curator should become the artist at the end of time, remembering the universe for us.

I LOVE the idea of the Curator appearing as any old Doctor. It should be a right of passage, a chance for actors who have moved through the role to consider their place in the story when they're old enough to look back on their time with it. Why shouldn't "revisiting the favorites" include them all?