It was Christmas Eve in Hill Valley. Marty McFly sped through the vast crowd of shoppers looking for their last minute Christmas gifts, hoverboard hovering proudly beneath his feet.

His parents always complained about his carelessness. 'Marty will get himself killed one of these days if he doesn't watch it', they would often say.

They were wrong as far as he was concerned. Marty had done this countless times without experiencing any problems. Well, that was until now.

You see, one thing Marty had never anticipated was that a blue box would materialise out of nowhere.

"Crap!" He exclaimed as the collision with the box sent him flying from his hoverboard.

A skinny man with a large mop of hair opened the box's doors and took out a thin tube. A whirring sound filled the air and Marty found himself hovering in the sky.

"Can't have you falling to your death now, can I?" The man said. "I'm the Doctor. You must be Marty?"

Marty frowned.

"Yeah. How come you know my name?"

The Doctor was twirling fiercely, sending his tube pointing in a number of different directions.

"One day, we will meet. But I won't look like this. I'll look like a skeleton man with a tendency to cry a lot. And a smaller screwdriver. Not a euphemism by the way,"

"Sounds like Doc," Marty chuckled. "Almost…"

The Doctor frowned.

"Doc?"

"He's a friend of mine. You'd like him,"

"Doc Brown?"

Marty stared.

"How do you know him?"

The Doctor shot an annoyed look at Marty.

"Other people can know him too, you know. Why are humans so close-minded?"

This time it was Marty's turn to look annoyed.

"Sorry. It's just…Doc's never mentioned you. That's all,"

"We're both time travellers, Marty," The Doctor said, as though teaching a child the alphabet. "I've yet to meet him in your timeline, just like you haven't encountered me before tonight,"

"Man, I'd hate to be in the same room as you two," Marty murmured. "One Doc a time is enough. So, what brings you here tonight?"

"I've got a warning only you can take. I believe next year is 2015?" He asked.

Marty nodded.

"2015 is about to change. What was meant to come will be no more. Think of it like when you unwrap a present. Once a present is unwrapped, is it still a present? Actually, maybe that's a bad analogy," He explained.

"Cut to the point, Doc….tor. What's going to change?" Marty asked.

"Time will tell. Time always tells. Believe me, I should know. I saw a rogue Time Lord change human history so Piers Morgan became prime minister after Tony Blair. That was a frightening alternate timeline," The Doctor remarked.

The Doctor closed the blue box's doors.

"Hey! Wait. You need to get me down," Marty shouted as the box disappeared. "Oh crap, looks like I'm going to be here for the rest of my life. Merry Christmas, Marty…."