The Internet exploded a few weeks ago when Missy, the mysterious woman watching over the Twelfth Doctor all season long, was revealed to be none other than the Master, regenerated into the form of a woman. Good lord, who saw that coming? Quite a few people, as it turned out, but more people were concerned about whether or not the Master's regeneration into a woman would eventually mean that the Doctor would, too. As fascinating as that discussion is, it's clear that we'll eventually get a female Doctor - and equally as clear that the most recent Master two-parter, while not the absolute best Master story, is up there among the greats. Before you get too terribly upset, let's talk about the stories the Master has featured in and how they compare. Bear in mind that this list is not evaluating the stories themselves - it instead looks at how good a vehicle for the Master the story was, whether it stands out as a classic battle between the Doctor and his arch-enemy, and so forth. If you like this list, let us know in the comments below what you think the worst Master stories were - since, as you may have noticed, these lists always come in pairs.