After a few moments of sitting in silence, the Doctor returned. He was still frowning and avoided eye contact with both Amy and Rory. He walked over to the console, pulled out his sonic-screwdriver, and pointed it at a tiny hole on the underside of the console.

"What's that for?" Amy asked.

"...Two things." He said after a moment.

"And...?"

"To keep her room locked, incase you try to go nosing off in the wrong room, and to start up the program."

"Hey! I don't go 'nosing off'! ... That often... and what's 'the program' anyways?"

The Doctor straightened up, "I have her in a holographic chamber. The TARDIS basically makes her think she's still at home, living her ordinary everyday life."

"Well, why'd you do that?"

"Because."

"Why?" Amy asked again.

His voice raised, "Because Amy!"
She shrunk back a step.

"Because..." He threw his hands through his hair, "Because. She can't ever leave that room again. Never. Ever. She'll be stuck in there the rest of her life... If we remove her from there, just for a moment, she'll burn up..."

It was silent except for the purring of the TARDIS engines.

"W-Why is that, Doctor?" Rory asked.

"If we take her from that room, she'll wake up in a matter of seconds. The TARDIS will re-trigger her memories and I won't be able to do anything... If the Yar-Ralos weren't after her, we could've just returned her to her house... She's trapped in here and it's all my fault..." He was at the computer screen now. His hand was stroking the side of it. "All my fault..." He repeated.

"Well, why are the 'Yar-Ralos' after her anyways?" Amy asked looking over his shoulder at the screen.

The room it was looking down on was rather small for a TARDIS room. There was a foggy mist enveloping the room, no doors or windows in sight. The walls were TARDIS blue and had the appearance of a foggy watery like substance running through them. There was a small, flat bed on the floor in the centre of the floor. Diana was lying on it, still in her white night dress, with the appearance of being in a very nice slumber. There was a small smile on her face.

The Doctor clicked the screen off and turned around. Amy looked around, forgetting his presence for a moment. The anger flushed from his face and he clapped his hands together.

"Alright, so shall I explain why they need her?" He asked, the cheer somewhat returning to his voice.

They both nodded.

"Alright. Well. The Yar-Ralos are a somewhat old race. They're about... 2,000 years old, so I guess more fairly new. Their race survives solely on meta-crises; don't ask why they chose a rare type of energy. Meta-crises are when something that can't exist, exists. Like a Time-lord-human, which is what happened to her mother. Her mum, Donna, created a duplicate of me with my severed hand and some regeneration energy. Part of my DNA went into her. Her human brain couldn't hold all of my knowledge so her brain started burning up, like Diana's was. I had to block out all memories of me so that wouldn't happen. If she ever remembered me, even for just a second, she would die. Apparently, unknown to me, Diana got her mother's, my, knowledge and it was triggered when she saw the TARDIS. It didn't happen when she saw me because, well, I regenerated sine that last time I saw her mum. Diana is, therefore, also a meta-crises and that is why they wanted to use her... get it everyone, questions?"

Amy shook her head. "No, well, kind-of... er, not really." Rory replied.

"Yes?" The Doctor asked.

"Well, why didn't that, um, thing just take her. Why did he just give her up?"
"Ah, good question Rory. Their teleports only take one at a time. Don't you worry; they'll be back sometime. Soon I should suspect."

"So what are we going to do?" Amy asked excitedly.

"Nothing. Well, you're not doing anything. I'm going to send the Yar-Ralos back to their planet well you two stay in the TARDIS, out of my way. Understand? The Yar-Ralos are incredibly violent, and won't take a second glance at you two. They'll shoot you on the spot."
"And what about you?" Amy retorted.

"I don't belong on this planet. It will take them longer to decide whether I can be used as a power source." He smiled.

"And are you sure about that?" Amy asked crossing her arms and raising her eyebrows.

"Um, no. But it's a good guess." He said and threw down the switch on the console.