Doctor Whooves. A name whispered in hushed tones in the criminal underworld of Equus. Whether or not that's his true name is unknown, but what is known is this: If he appears, you'd best shut down all remotely criminal operations, or else he'll shut you down in the name of Her Majesty. The finest secret agent in all of history. And he's getting sick of it.
Enter a mare named Derpy Hooves. At last, a way of escape has appeared! Now all he has to do is fly through time and space and hope that his former bosses don't come looking for him.
This is going to get complicated, isn't it?

Gallifreyan text created using this helpful bit of software. That download no longer works try this one instead.

For those wondering, the "present" in this story is about 1001 A.N.M. (After Nightmare Moon), sometime during season 1 or 2 of the show.
Also, this little continuity is not my actual headcanon about Time Turner as he appears in the show. That one's actually kind of boring.