Cool.

"The streets of ancient Gallifrey were a lot like the streets of modern Gallifrey, the Doctor noted distractedly. This wasn’t surprising, as glaciers had more forward motion than the culture of the Time Lords. "

*snort of laughter*

Oh, what a wonderful idea! You carried it off brilliantly, too - and it's no small feat keeping all of them in character. The situations were often incredibly clever, too, especially the child!Doctor and the Other. :D