Disclaimer: Thanks for the reviews! I hope you like this next chapter too. Rose and the Doctor are going to have a little chat with Sarah and if anyone has any suggestions as to what should happen next I'd love to hear them.

Doctor's POV

I followed as Rose walked around the console to speak to the strange little girl. She eyed us both suspiciously as we approached, but didn't say a word. Rose gave a small smile and brought herself down to eye level with Sarah.

"Hi there sweetheart," she said calmly. "I need you to listen to me carefully. We scanned the little device you gave us. It seems to have brought you to the past in another universe. Do you know what that means?"

"It means you don't know who I am," Sarah replied, crossing her arms. "And that the button did exactly what is was supposed to."

"Wait a minute," I interjected. "Someone built a button that pulls you across dimensional boundaries, which by the way is impossible, and left it in the reach of a seven year old?"

"Yes, she did," Sarah said, pointing to Rose. "Or she hasn't yet. But she will eventually. And it wasn't exactly in my reach. I may have been poking around in a place where I wasn't supposed to."

"Sarah I think you've forgotten something," Rose pointed out. "You came here from a different dimension. That means this world is just like yours but different. All the same people are here, but they aren't the same ones that you left behind. I didn't make that thing. It was the me that's from your world."

"No," Sarah said. "It was the same you, except at a different point in your time stream. This was all in your story, except I never believed it. I guess it was true through."

"Sarah," I said. "Travel between worlds is supposed to be impossible. You shouldn't even be here right now. There is no way that this can be the same Rose from your world."

"But it is," she protested. "Just like the story said. Except she never told me that I was part of her story. She must have known though."

"What story?" Rose asked. "Why don't you tell it to us so that we could understand?" Sarah looked between the two of us hesitantly.

"Maybe just a little," she said. "Ever since I was little, you used to tell me this story about my dad. You said he used to take you to the most amazing places and that you two would go around helping people all the time. One day, something happened and you two were separated in two different worlds. You said that you were pregnant at the time and I never got to meet him because we were stuck in another world and he couldn't get to us. And then sometime not too long ago you started working on this thing that was supposed to use some special energy to get through this tiny crack in space that kept opening up. I wasn't supposed to touch it because you said it might only work once."

"That's not possible," I said.

"I thought so too," Sarah replied. "But considering the fact that I'm here, it must be true." I looked over at Rose who looked a bit distracted at the moment.

"That doesn't even make sense though. It implies that she's traveled through different dimensions multiple times."

"Sarah….."

"Well maybe she did."

"Sarah..."

"But that's not possible. The technology needed to do that doesn't exist anymore."

"Sarah."

"Well obviously it does! Or else I wouldn't be here!"

"Sarah!"

"I'm not sure I believe you!"

"Sarah!"

"Well I'm not sure-"

"SARAH!" Rose shouted the girl's name this time, cutting her off mid-sentence. Sarah shut her mouth and looked up. "You said that story was about you dad. Who exactly is your dad?"

"Well," she started. "Like I said already, I've never actually met him before. I've heard a lot about him and seen some drawings that you had made, because you didn't have actual pictures."

"Yes, but what was his name?" Rose clarified. "Because I grew up without a dad too, and even then I still knew his name."

"You called him the Doctor," Sarah stated. She looked up at me. "That's you isn't it? I could tell by listening to you talk. The things you say remind me of things I've heard my mommy say." For the second time that day, my jaw dropped in shock.

"Can you excuse us for a second?" I asked. Without waiting for a reply, I grabbed Rose's arm and pulled her back to the other side of the console.

Rose's POV

The Doctor seemed a bit startled. He stared the young girl down from across the control room as if she were plotting to kill him. I glanced back to see her intently examining him. Even if everything else she said was a lie, she was obviously being truthful when she said she'd never met the Doctor before. She stared at him like he was some sort of impossible creature, and I guess he was to her.

"Doctor," I said. He continued to watch Sarah, watch him. "Doctor what are you thinking right now?" The question seemed to bring him back to reality.

"What am I thinking?" he repeated. "I'm thinking that almost everything this child is saying is impossible. I'm not sure how much of it I believe."

"You think everything's impossible?" I asked.

"I said almost," he noted with a seductive wink. "But there is one way to find out exactly what's true and what isn't." He walked over to the screen and began to press some buttons around it.

"Doctor what are you doing?" I asked. He waved me over and showed me what was on the screen.

"I'm running another scan on her," he explained. "Except this one is looking specifically for partial sequences of Timelord DNA. If she is part Timelord, that means she really is our daughter and that you actually do end up in another universe at some point in your life."

"How can you be sure?" I asked him.

"Well I can't be," he admitted. "But in all my days traveling in other dimensions, back when that was possible, I never once ran into even the slightest trace of another me, which leads me to believe that I am a phenomenon unique to this dimension. Seeing as I am the last Timelord in existence and she won't be born for another few years, the presence of partial Timelord DNA would confirm that she…originated in this dimension and the other, more questionable, details of her story must be true." There was a beep as the scan finished.

"It's true, isn't it?" I asked. He nodded in response. "Well I'll believe it. She sounds too smart to be a normal seven year old. Her words are too big, her explanations are too scientific, and her attitude has this little bit of arrogance in it that I've come to associate with Timelords." The Doctor frowned.

"I would argue that Timelords aren't arrogant, but that would be lying," he told me. He looked up at Sarah, who was still observing the two of us. It was a bit hard to believe. That was my daughter staring at me. I had a daughter. "So what exactly are we going to do with her now?"