Jake had followed them as they rushed to the truck, desperate to get back to the flat before Rose suffered another memory loss. The Doctor pushed the speed limit, Rose sitting worried in the passenger's seat and Jake in the back looking antsy. Rose suddenly pulled the glove compartment open, rifling through the contents.

"What are you looking for?" The Doctor asked quietly, glancing over at her.

"Paper." she said shortly.

"For what?" he pressed lightly.

"To write a note," she said as she finally found a blank sheet of paper and a pencil.

"A note for who?"

"For myself," she explained. "If I've been losing my memories that means that you've had to tell me who you are and what's going on each time. From the sounds of it, it hasn't been graceful each time," she gave him a weary look. "So I'm going to write myself a note telling me who you are and what's happening so you don't have to. That way I'm less likely to try to shoot you or do something equally as awful." she finished quietly before starting to write.

The Doctor just went back to concentrating on driving; worry washing over him as he tried not to show it. Jake sat quietly in the back, running over ideas and theories in his head. After a few minutes Rose looked up from her paper and folded it over, setting it in the Doctor's lap.

"If it happens again, give this to me," she instructed. "It will explain everything quickly and hopefully keep me from hurting anyone." He gave her a curt nod, hoping that there would be no more memory loss for the note to be of use. She clutched her arms around her middle and stared blankly out the window.

"How're you feeling?" Jake asked her, taking note of her discomforted look.

"Everything hurts," she mumbled quietly, turning towards him.

"Well if this is the prequel to memory loss, its happened before," he began. "But I never thought to ask how exactly you were feeling the first time. You just said you didn't feel well so I told you to go home." he sighed.

"So let's assume this is what happens before the loss. Describe everything you are feeling right now," the Doctor said.

"It's just like I have this sudden headache," she began. "It's just pounding." The Doctor glanced over and gave her a sympathetic look, clearly hating that she was in pain.

"Anything else?" he pressed, keeping note of everything.

"My stomach is just churning, like I'm coming down with the flu or something." They were almost to the flat now, the Doctor determined to get her into the comfort of her own home before it happens, which he knows it will.

He parked the truck haphazardly and they all made their way up to the flat with haste, Rose starting to feel worse. He sat her down on the couch and knelt in front of her, taking both her hands in his.

"Rose, tell me what you're feeling," he urged.

"My head is still pounding, but I feel all tingly now," she described, trying to ignore her headache. A chill went up her spine and she flinched involuntarily.

"Tingly? Like how?" Rose just stared at him.

"Doctor?" she whispered uncertainly. The Doctor sighed, looking completely defeated.

"Oh, Rose," he placed a hand on her cheek and looked her over. He reached into his pocket where he had stashed the note she had written to herself and handed it to her. "Just read this, okay?" She looked at him questioningly but took the note.

Rose,

If you're reading this it means that you've lost your memories again. Yes, the Doctor is really here so don't panic. You haven't gone mad. We saved the multi-verse together, and then he came back to this universe with you. He's trying to figure out why we're losing our memories so just go with whatever he says.

She looked up at him, teary-eyed as he looked her over. There had been no physical signs of the memory loss. Just the headache and the tingly she had just been talking about. He figured that had to have been a clue.

"Okay, so what do we do?" she finally asked.

"You believe the note?" he asked almost afraid that she was just faking it and she would lash out at him.

"It's in my handwriting," she said. "Although I have no idea what I'm talking about in it."

"Right, okay." he said, hand still on her cheek. "Right before you lost more memory you said you felt all tingly." he began. "What is the last thing you remember?"

"Well I certainly don't remember saving the multi-verse like I said in my note." she replied.

"I know. You didn't remember that the last two memory lapses either. I had to tell you." he explained.

"What about the cannon?" Jake asked, standing off to the side, observing the scene.

"The what?" Rose asked.

"Guess that's a no then." Jake sighed.

"What's the cannon?"

"You built it to shoot yourself across the void and back to your original universe."

"What would I do that for?" a confused looked crossed her face. "What do you mean original universe? Where are we?" As if she had just noticed, she looked around, the room unfamiliar.

"This is our flat." The Doctor said softly, looking into her eyes.

"What? We have a flat?" she asked, startled.

"Yes, you moved out of the mansion a while ago."

"Um, okay." She said, trying to process it. "And you live here now too?" she asked, trying to get it straight in her head.

"Yes. Living the everyday life with you, Rose Tyler,"

"Since when?" He sighed heavily before going into a quick explanation.

"Well after we got separated, you built a dimension cannon and came back to our original universe and saved the multi-verse from the daleks. Then we got left here." He explained. "But, Rose, that's not important right now. We need to figure out why you can't remember any of this because it's progressing rapidly."

"What is the last thing you remember?" Jake asked. She sat quietly for a long while, looking blankly at the wall.

"Um, a few months after being left here?" she said, not feeling like there was more after that but not being able to recall it.

"Okay," the Doctor said, getting down to business. "Your last memory lapse left you at the point where you were just starting to think up the dimension cannon.

"So the amount of memory taken is increasing?" Jake asked.

"It would seem so unfortunately." The Doctor replied.

"So what do we do then?"

"Well, I'm going to try to finish the sonic quickly as get some answers, that's what." He began. "Rose, you just sit tight okay?" she nodded, looking worried. "Jake, make her some tea, will you?" he said before he disappeared into the spare bedroom.