Something is wrong. The mental connection between the Doctor and Black Mist has been broken. But that's not all. The Doctor is changing. Slowly, but noticeably, not only in appearance, but also in personality. He begins hearing voices and feeling impulses, violent ones. Will his friends be able till help him, or is the Doctor lost forever? DON'T FORGET TO READ THE FIRST BOOKS: -Doctor Whooves - Part 1: Arrival in Equestria -Doctor Whooves - Part 2: An Elder Race

The Doctor discovers he is stuck in Equestria, whether he likes it or not. When the Doctor comes to, he finds he has traveled to the near future, where a celebration, in the city of Canterlot, is taking place. He attends the celebration with some old, and some new, friends. But soon, he finds out there is something lurking underneath the city, which is deemed the "safest place in Equestria". Something ancient. Something dangerous. Something that hates everything, especially the Doctor. And it isn't only one, it's a whole army! Will the Doctor save Equestria again, or will this simple, fair world fall to the hands of one of the Doctor's oldest enemies? DON'T FORGET TO READ THE FIRST BOOK: Doctor Whooves - Part 1: Arrival in Equestria

After absorbing deadly radiation, the Doctor regenerates. His TARDIS crash lands and he finds himself in the form of a pony in a very strange world. He runs into a pony named Derpy, who lets him stay at her home while he repairs his TARDIS. At first, the Doctor is determined to leave this strange world, but the longer he stays, the less he's sure.