Prologue

He walked inside the TARDIS with his to-be doctor companion hurrying beside him, the doors closing quickly behind them.

"Alright!" he exclaimed. "Well- sorry about that. I wasn't planing on starting another dangerous adventure but- oh, you know how it happens," he grinned at her, and she shook her head, smiling. "So! Mmm, lets go a bit mysterious, shall we?" Martha raised her eyebrow. "So, old girl. Take us somewhere unexpected?" He said, looking up. The TARDIS started vibrating and whooshing, and he held on to anything he found.

The movement stopped and he straightened himself, looking around for his coat.

"Alright?" he asked to his companion.
"Yup! So.. where are we?" She asked, straightening her jacket.
"No idea!" he grinned. "Don't you love it when this happens?"
"Depends," she said, pressing her lips together. " As long as it's a planet where humans aren't hated and burned as sacrifice or something like that, then yes, I do love it."
"Oh, she'd never take us somewhere like that. She likes you," he concluded, and then cleared his throat. "So, c'mon!" He said, and ran over to the door, opening it carefully.

The sound vibrated throughout what seemed like a factory. Or- no, not a factory- a... mall?
He frowned and walked around the hall he was in. Yeah, this was definitely a mall. It was empty, though, so it must've been kind of late in- well, wherever the TARDIS had taken them.

He looked around trying to gather clues about where he was. This place seemed quite familiar, but he couldn't understand why.

"Where are we?" Martha asked in a hushed voice.
"Let's find out," he muttered, closing the TARDIS door.

They kept wandering around, staring at the shops. After five-ten minutes of walking, he decided this was an Earth mall, even one in London. The shops kind of gave it away.

"I don't get it, why Earth? And why a normal- shop?" He said, a grimace in his face.
"Maybe there's something wrong! Didn't you pick up a distress signal or something? Don't you wanna check the TARDIS?" Martha asked, looking at him.
He shook his head. "I would've known."

He started to think that the TARDIS had probably messed up her landing and was turning back on his heels when he heard heavy and hurried footsteps. He hid himself behind a wall, pulling Martha with him, and sharpened his ear, but the only thing he could hear were the footsteps getting closer.

He peeked slightly through the wall and gasped immediately as soon as he saw who was the creator of those footsteps.

"Oh no," the Doctor muttered, his eyes going wide.
It was him! Well, not him him, but old him! Long ears, blue eyes, leather jacket. He was holding a strange sort of scanner in his left hand and his sonic screwdriver in his right hand. Why had the TARDIS brought him here? If old him saw the new him, he could create a paradox! Why risk something as big as that?

"What?" Martha asked, looking at him curiously. "Who's that?"
"Shh," the Doctor said, and stared at his old self.

'This must be something really important,' he thought, and silently followed the Doctor. Martha almost groaned- of course they were going to follow the stranger. But she didn't mind much, really. She loved this, travelling around with the Doctor, wether they found problems or not.

The Doctor and Martha followed the Doctor's old self through some corridors and stairs. The Doctor racked his brains trying to remember this moment in his past life, but he couldn't quite grasp it, especially since he didn't know exactly where they were. Then his old self turned a corner, and everything came back painfully. As he saw where they were headed everything hit him like a cold bucket of water. He knew were he was.

London, Earth, 2005. Most precisely, the day he had met Rose Tyler.

His eyes grew sad and dark and he wondered what was so important that the TARDIS had forced him to go back to such a beautiful but painful day. He shook his head slightly, as if that would get rid of the sad thoughts in his mind, and tried to focus on following his old self. Martha eyed him suspiciously, noticing his sudden mood change. Did he know where they were? And who was this man they were following?
Suddenly, the localization device starting beeping like crazy.

"Oh, I got you," the blue-eyed man muttered as he started running to where the device was guiding him.
The Doctor and Martha caught up with him quickly, still managing to stay undercover. His ninth regeneration had stopped at a big door which seemed to be locked. The Doctor sighed.
He knew what was coming.
Behind that door was a troubled Rose Tyler waiting for her doctor to walk in and take her hand and order her to run. He breathed in shakily and bit his lip in expectation as he saw the old doctor open the door with his sonic screwdriver.
He followed him slowly, his eyes quickly scanning for his blonde friend.
But there was no sign of her.
He looked around frantically. Maybe this was the wrong room? No, she should be here! Instead, the room was full of mannequins that his old self was starting to examine. He blinked furiously and started to run back to the TARDIS.

Everything was wrong.

A/N: So! Hello, there. So um, I'm not exactly new here in , I had an acc but it was all harry potter-ish and i had some p crappy drafts there so i decided to start from blank! This is a story I've had in mind for a while, and I'm glad I'm finally putting it into action. So, I really apologise for any mistakes in the story- my first language is not English, so let's just hope there are not many mistakes.

Thank you for reading! Be sure to review if you find this at least slightly interesting. Don't know if the idea's been used before, but I really hope not! Anyway, thank you for reading! I'll update probably tomorrow. Bye-bye !