Twenty years ago, the land of Equestria was changed forever by a deadly outbreak. Now, in an apocalyptic world, a small group of survivors may hold the key to changing everything around.

The Doctor and Derpy find themselves in the city of Atlantis. However, the underwater utopia is about to hit its boiling point.

As the armies recover, Esmeralda sets her sights on Canterlot. Meanwhile, as Donna ventures into the Changeling Castle, the Doctor, Twilight, and Angie take charge of the Equestrian army while Celestia recovers.

When the possible collides with the impossible, a bond is created; and nothing walks away unchanged.

The Doctor and his companions accidentally travel to the year 56, where Equestria is currently at war with the new Changeling Empire. In order to stop the invading army, the Doctor will need to team up with a hardened Celestia and a simple farmmare.

Twilight Sparkle has lived a full life but now she's a 115-year-old pony lying on her deathbed and waiting to pass on. As her time draws near, she receives a visit from a mysterious mare who has come to seek out the answer to a simple curiosity.

The Doctor returns Derpy to her time, but what they find waiting for them is a panicked Carrot Top, a mysterious spaceship, a pair of confused mares, and a sinister creature with a desire for Derpy Hooves.

The Doctor and Derpy arrive on the Moon almost 1000 years in Derpy's future. Here, they find a futuristic, Equestrian Moonbase as well as a dark force that has a score to settle with the visiting Princess Luna.

The Doctor, Twilight, and Derpy arrive in the England of the Doctor's universe on Christmas Eve of 2010. What waits for them includes an icy storm, something from Derpy's past, and a reunion with a lost friend.

A pegasus named Aros travels to a mysterious estate to investigate an old legend. What he finds will seal his fate and he will have no hope or wanting of escape.

Rainbow Dash had a great life until she was betrayed and killed by one of her closest friends. But nothing, even the workings of a psychopath, is all what it appears to be.

Following an accident with the TARDIS, the Doctor finds himself in a strange universe with a new body that he didn't gain from regeneration. Meanwhile, a pegasus named Derpy is unaware that her life is about to change forever.

Rainbow Dash is remembering things that she shouldn't, her friends are keeping secrets from her under orders from Princess Celestia, and just who is this man that keeps appearing in Rainbow Dash's dreams?

The Doctor, Twilight, and Derpy end up accidentally taking a detour on their way to the Doctor's universe and instead end up in a reality where they are merely fictional characters.

The Doctor has been living in Ponyville for several peaceful weaks, but the peace is shattered when a stallion from an alternate dimension named Clockwork appears.