Missy is glorying in the chaos, hoping that a certain someone might turn up. What she doesn't expect is an entirely different do-gooder spoiling her plans and teaching her life lessons.
The Gunpowder Plot. It's a favorite of time travelers. If Missy's going to hitch a ride, that's the place to cause trouble. Especially if trouble makes a really big bang.
The Monk has captured Missy. And he will have his revenge - But the Ogrons are also looking to settle an old debt. And when they call it in, they find themselves with too many Time Lords on their hands.