It's been awhile since our last adventure, and I'm growing bored in the TARDIS. It isn't until he lets me plan our next destination, the day of the very first Cutie Pox outbreak in Equestria, that he gets upset. What's up with him? Can I help him?

Something is wrong in Equestria, Discord's dragon tooth is missing! Its up to everypony's favorite Doctor and his companion to find and retrieve the tooth before its too late! can they make it? Find out in "Discord's Tooth." Allons-y!