Spike is only a baby dragon; only a baby after nearly two decades of life. His friends are beginning to worry if the little dragon will ever grow up at all, and begin various plans to make him mature. The Law of Unintended Consequences ensues...
When a blue box containing a mysterious pony lands in Ditzy's yard, she calls for the Elements. But the more she speaks with this "Doctor," the more convinced she is that they've met already.
The Doctor is popping back to Earth, and he's taking his friends and family along for the ride. When the TARDIS stalls in the middle of the vortex, though, old foes arise and threaten everypony on the ship.
Celestia, sick of her nephew's bad behavior, sends him on an adventure with the ninth Doctor. Together, they investigate a series of murders connected to a mining disaster-- or they will if they can stop arguing.