A/N: Second part! I don't know what the Master is planning exactly, but, I'll tell you, it won't be as dumb as his plan in "The End of Time". And, look, I even changed it to "In-Progress".
You see, I don't think that the Eleventh Doctor is as forgiving as the Tenth Doctor. Ten wasn't forgiving, at the beginning (see: the end of "The Christmas Invasion"), before he went on his "HUMANS ARE BRILLIANT! HUMANS ARE GREAT!" tirade and became less dark, but, I think, that Eleven is dark (see: the end of "The Beast Below") and once you've hit your three strikes with the Doctor, you're out. No questions asked. I mean, c'mon (SPOILERS!), if he turned the human race into a homicidal Silence killing machines then, surely, he would only give the Master one try (in both of their new bodies) before the Doctor had it. "New body, clean slate. Mess up once, you're done."
Once again, I own nothing. If I did, the Doctor and Amy would be together and Cumbermaster would have happened ages ago.
"Who's the Master?" Rory asked his brows knotted in thought.
"He sounds a bit pretentious, if you ask me—calling himself the Master", Amy muttered not quite under her breath. They were back on the TARDIS; the Doctor wanted to get out of that abandoned Marxian ship before they "booby-ed" into another trap. When they had arrived back on the TARDIS, the Doctor immediately went to "fixing his engine", as Amy had sarcastically yelled at him.
"Nobody of consequence", the Doctor said lightly, quickly punching in a destination. "Where to?" he asked them in a cheery voice, his hands clasped together. "How 'bout the Vif planet?" He didn't wait for their responses before he spun around and started to pilot the TARDIS. "They have emerald encrusted frogs that have the loveliest singing voices. The voices of angels, really. I was thinking we could gather a bunch up and make a choir"—
"Doctor", Amy called out his name, sternly, her tone taking the tone of a mother, so the Doctor stopped right in his tracks. She leaned against the consoler, Rory close behind her. "He's not a nobody—you wouldn't be like this if he wasn't somebody. Now, please, tell us who he is."
The Doctor rested his hands on the consoler, heaved out a sigh, "The Master is a Timelord." He glanced at Amy out of the corner of his eye and through his brown bangs, waiting for her retort. But, she just carefully studied him, waiting for him to continue, her mouth set in a straight, firm line.
It was Rory who broke the uneasy silence. "Well, that's good, yeah?" Rory quipped, taking another step closer to his wife.
"No, definitely not", he went back to leaping about the control pad. "He's an enemy—a bad guy, although I wish he wasn't."
"Okay, my mistake, it's not good", Rory nodded sheepishly.
"So, how dangerous is he? Are we talking Daleks? Weeping Angels?" Amy asked the Doctor in a confident and playful voice. "On a scale from one to ten, what is he?"
The Doctor thought for a moment; twisting his mouth, wagging his eyebrows, and bobbing his head in contemplation. "I'd say, on the level of menace and threat to the universe—he's a nine." He looked at Amy for a fleeting moment before he continued leaping about the consoler, messing with the controls. "He's the Joker to my Batman, the Moriarty to my Sherlock. He is exactly like me—but evil and all that."
"But, he saved you", Rory said, hope edging in his voice. "That's something, eh?"
"You don't know him, Rory...you don't know what he's capable of." The Doctor rested his hands on the control panel again and then continued in a weary, sad voice, "We grew up together; went to the Academy together—I mean, I suppose, I shouldn't blame him entirely for all the bad things he's done, but...it's hard not to. You see, he's had the sound of a banging drum in his head since he was a child, slowly turning him insane. If he's the same person he was before, that means he only saved me because he's saving it up for something big. I don't know if they're gone or not, but the never-ending drums in his head can't be wholly blamed for his evil deeds", the Doctor said quietly, but darkly, looking down at the controls.
"But, Doctor", Rory said, his voice straining, "You always make it seem like everyone deserves another chance."
"Yes, they do—but what seems like a million chances is far too much. I'm tired of getting my arse kicked by that man because I keep believing that this time, he'll see the light and become good. In my nine hundred and so years of living, I've come to the conclusion that we all have a choice—we can be either good or evil. Timshel is the Hebrew word for it, if I remember correctly...'thou mayest, thou mayest not'. It says that the way is open. We're all capable of great good and, if that's true, we're all capable of great evil as well. He's made his choice, time and time again."
"The great choice", Amy muttered.
The Doctor continued as if he hadn't heard her, "If the Master has really turned over a new leaf, as I've been hoping for hundreds of years, I need to hear it straight from him and actually see it through his actions. It's all him...it's always been him." The Doctor continued to work and muttered in a low voice, "Although, I don't know what I'd be without him"—
Amy interrupted him. "'For what is Evil but Good—tortured by its own hunger and thirst? When Good is hungry, it seeks food, even in dark caves, and when it thirsts, it drinks even of dark waters'", Amy quoted knowingly, nodding.
"Yes", the Doctor said, trying to keep the impressed look off his face, before he went back to work.
"So", Amy stepped next to the Doctor, "what's our next move? Are we going to track him down?"
The Doctor studied Amy intently for a moment before turning back to the TARDIS and patting the control panel, gently. "No, no. We always find each other. Somehow, someway, we run into each other. Besides, if he wants to be left alone, I'll leave him alone. It's once he starts his plotting and scheming that I'll have to step in."