The Doctor's face has been changed, and the Time Lords have exiled him to Earth. To make matters worse, they put him on the wrong Earth. Now he's a horse, and he just crashed into the Mane 6's tree.
Alone for the holidays, Scootaloo is drawn into a strange adventure with Spike and the Doctor as cheer and goodwill disappear from Ponyville's residents. Can they uncover the cause and fix the problem in time to save Hearth's Warming?
The Doctor, Twilight, Rarity and Pinkie Pie visit their first alien world in the TARDIS; the planet of Qing, and meet its exotic inhabitants, the Quilin. But not everything in this near-perfect utopia is as it seems.
When Zecora falls ill with a deadly sickness, it falls to the Doctor, Twilight, and Fluttershy to find a cure in her ancestral homeland Zebrica. All the while dodging the twisted machinations of an old foe from the Doctor's past.
After the harrowing events of "Traveller," the Doctor is forced into having some downtime in Ponyville while the TARDIS rests. Meanwhile, Twilight goes to confide in her beloved mentor, but ends up learning far more than she expected.
The Doctor, now Time Turner, is getting along quite comforatbly in Equestria with his new friends. But when a string of disappearances occurs in Ponyville, it's up to everyone to solve the mystery of the who, where, what, and why.
Happiness, Twilight decided, was all about perspective. In retrospect, she would have taken her previous head cold over being stranded in the wrong time by a power hungry filly any day.
The Doctor, fresh off his regeneration, sets off in this strange world with ponies and mythical creatures with his TARDIS onwards and upwards to see the universe.
Twilight, Rainbow and Applejack travel 3000 years into the past with their new friend the Doctor, to the ancient city-state of Roan. They meet the famous Leonard DiHoovsie, and find themselves embroiled in a deep mystery with dark implications.