A/N: It just came to me that Demons by Imagine Dragons is the perfect Twissy song. It's attached in the multimedia section of this chapter
Kate, one last thing", Missy exclaimed, half-way out the Black Archive door. "How do I make them trust me?"

"Become someone else. They don't know you remember. They know the Master, they know Harold Saxon, but they don't know Missy. You're new to them. Use it to your advantage".
"Thank you, thank you", Missy whispered as she walked away. She pulled out her device again. Skimming through the information, she read the first name on the list, "Rose Tyler. Location: Bad Wolf Bay".

"I know you've hidden it from me Missy. Where have you put it?" The Doctor asked himself, not fully aware that he was alone again in his blue box. There was one vital part left to build the power source and 'Missy' had taken it. Though he had probably misplaced it, the thought that his friend was trying to undermine him was hanging over his head. He carefully looked under his things that were spralled across the workbench, then decided to give up. And then found that he actually did need the part and went back to looking.
"We could have ruled the universe. We could have been king and queen", he murmured into the table. "Why did you have to go?!" His voice echoed through every corridor and, in a huff, threw everything off his desk. He sat with his head in his hands like he had been scolded by his mother and moped.
"Oh, don't be a child Theta", said a voice behind him. It was not one that he recognised, and he hadn't heard the doors open, so who could it be?
"Missy?" he asked hopeful, and turned around to see a woman with curly brown hair. She had a smile across her face and was wrapped in a golden aura. The Doctor could just about see the mint green of her dress underneath it. "Okay, not Missy... Who are you?"
"Don't you remember me Doctor. The only water in the forest is the river".
"Idris?" He said, still not quite remembering the name he had given her.
"Oh, come on Doctor. Just because you've changed your face doesn't mean you have to be all mature. I mean if you can plan to destroy a planet then have a hissy fit about it, then you can at least call me by my real name".
"Fine. What do you want 'sexy'?
"I want you to give up for once Doctor. You know I support you completely in your travels, but now you stop. You're going too far".
"I can go as far as I want, thank you very much", The Doctor retorted, heading towards the materialisation trigger. He was about to activate it, but found it unable to move. However much he pushed and pulled at it, it didn't want to dematerialize. Shooting Sexy a dirty look, he went to sit back in his armchair. Then promptly fell onto the floor as he found that Sexy had moved it from the console room into God knows where. "She better not have put it in the swimming pool again. I'm not cleaning that water again. It is a waste", he thought to himself, under Sexy's chuckling.
"Look at you. Without me you are nothing Doctor. As long as you are in the TARDIS, I own you".
"Nobody owns me", he said gruffly.
"Well, somebody must. Otherwise why would you be risking a whole race for Gallifrey?"
"There was the one that regrets, the one that forgets, but I wanted to be the one to actually do something about it".
"You don't have to be a hero Doctor".
"I don't quite know what you're getting at. Do you want me to save Gallifrey or not?"
"You're not saving Gallifrey at all. You're giving it a sacrifice".
"Gallifrey will always be superior to Earth. Time Lords will always be superior to human beings. This isn't a sacrifice, it's a... Reaping".
"What makes you so superior? You said yourself you're just a madman in a box".
"I can do anything, change anyone. I can make reality fall apart then rebuild itself. I control the laws of time and space itself. I am a God!"
"You know who I hear when you say that Doctor. I hear her. I hear Missy. And where is she now? You've made them so terrified, so scared that even she h-"
"That'll be enough of that", The Doctor muttered disabling the interface and going back to sit in another armchair.