When the Elements of Harmony were reactivated in order to defeat Nightmare Moon, the sudden power surge that followed ripped small holes in many universes. One unfortunate Time Lord happened to be too close to one of these holes and fell through while aimlessly floating around space in his TARDIS. After being thrown into the Equestrian universe, he crash-lands into Ponyville and finds himself stuck with the ponies due to his TARDIS suffering severe damages.