Doctor Whooves Edition 2: Derpy Hooves and the 9th Doctor travel to 30th century Canterlot for a quick trip, but must remain longer to stop a plot that would subjugate all of the city's citizens.
Doctor Whooves Edition 1: Derpy Hooves gets onto a carriage that turns out to be part of an alien sub plot. A mysterious stallion called "the Doctor" rescues her, but the perpetrators are still at large and on the rise.