Twilight takes a break from traveling with the Doctor to visit the Crystal Empire with Spike. So imagine her surprise when the Doctor pops up with a different face, different companions, and a whole new threat.
The Doctor and Derpy get word of chaotic disturbances in Ponyville and Canterlot. While investigating, The Doctor's past comes out of the woodwork - literally. How is this possible? And what force brought multiple doctors and companions together