Monday 26th October 2015 2.12am.

Scott is hiding in some bushes near to the side of his Grandparent's house on the Lyons Estate. He has his a new backpack packed with essentials for his 'trip'. He checks his watch, which shows the date and time, and looks up and down the street. He hears a figure approaching, so he ducks back into the shadows. It is a shortish man wearing a large black jacket with the collars pointed up, and a hat pulled down covering his face. He walks up to the elder-McFly residence and looks up the drive. Scott looks from his hiding place to see who it is, but it is too dark to make out whom it is. As Scott strains to see, the man moves on to Scott's left and further down the street.

Scott mutters to himself.

SCOTT

Damn, that's all I need, somebody else hanging about.

Scott moves forward and looks down towards the entrance of the estate. He sees that the man has stopped a short way along the street. Scott mutters to himself again.

SCOTT

Aw, come on. Keep walking will ya.

Scott carefully moves along the street in the shadows to see if he can see who the man is. As he gets close he accidentally kicks a discarded "Pepsi Perfect" bottle, which creates a racket. The man looks round, but Scott hides before he can be seen. Just as the man looks away, three sonic booms sound out and the DeLorean appears out of nowhere. The frozen car brakes to a halt along the street. The man in the coat rushes towards the stationary vehicle.

SCOTT

Who the hell is that guy?

Scott sees the gull-wing door of the DeLorean open up and a 71-year-old Doctor Emmett Brown step out wearing a white coat and a Hawaiian shirt underneath. Einstein the dog leaps out behind him. He looks around bewildered and then sees the man in the coat rush towards him.

MAN

Doc! Doc!

The man takes his hat off as Doc looks up at him.

DOC

Marty! Is that you?

The man is revealed to be Marty Senior.

MARTY

Doc! Oh my God, am I glad to see you!

Marty embraces Doc.

DOC

So this is the year 2015? I wasn't expecting you to greet me. I just left you in 1985. I mean the 17-year-old version of you.

MARTY

I know Doc. That's why I'm here. I need your help.

DOC

Why what's going on? What's been going on in the last thirty years?

MARTY

It's my kids Doc. They're in trouble; something's got to be done about them.

DOC

Why what's happened? Do they turn into assholes or something?

MARTY

It's a long story Doc. I don't want to tell you too much because you told me you don't want to hear too much about your own future. Screwing things up. Stuff like that.

DOC

If you need help Marty, I'm willing to take a chance. Start at the beginning.

MARTY

Well here goes; it's pretty heavy. You know when you dropped me off home in 1985 and headed off to the future?

DOC

I hope so. That's where I've just come from.

MARTY

Well the next morning I woke up and found that my life had changed around quite considerably. I found I had a new 4-by-4 and was about to go for a spin in it with Jennifer when you turned up.

DOC

Me?

MARTY

Yeah, the you of the future - well the you from not long from now. You came from 2015 to fetch me to help my son Marty Junior out.

DOC

You have a son? Wow!

MARTY

Anyway, Junior had gotten himself in trouble with this kid called Griff Tannen...

DOC is stunned at hearing the name.

DOC

Griff Tannen...

MARTY

Yeah, he's Biff Tannen's grandson. Anyway, because of Griff, Junior ended up doing time and we came along to straighten it all out. Griff ended up being the one being arrested and Junior was in the clear. We went home and... well that's another story.

DOC

So what's the problem now then?

MARTY

2015 has arrived and Junior has been arrested again. It happened last Wednesday Doc; he's now in gaol. If we had it all sorted when we came here from the past, surely he should have been okay now shouldn't he?

DOC

Great Scott! That sounds terrible. If we had sorted everything out, something in the space-time-continuum must have been altered again to screw this event up.

MARTY

Can we go back in time a week to sort this out? Jen's in bits over the whole incident.

DOC

We need to work out a plan. We can't just turn up and go wading in. It could cause all sorts of complications. If you interact with your 17-year-old self and mess the course of events you lead, it could cause a major paradox.

MARTY

But my daughter will end up in trouble too.

DOC

You have a daughter too?

MARTY

Yeah, Marlene. She tries to break Junior out and ends up doing time herself for it. She's already tried once and been let off with a caution. She even attempted suicide.

DOC

Come on Marty, hop in, we can't let all this happen. If we go back a couple of days before all this took place, we can figure it all out from there and you can show me around the sights of Hill Valley in the future. Come on Einy, back in the DeLorean.

Einstein jumps into the DeLorean. Doc pulls his radiation suit out and starts to put it on. Marty climbs in after Einstein.

DOC

So Marty, what have you been up to these last thirty years then?

Doc gets out his case of plutonium and charges up the DeLorean for time travel.

MARTY

What haven't I been up to Doc. Remember the demo tape I did just before you left? Well I posted that off to the record company.

DOC

You did it then? I knew you would. You were a natural. You just needed a bit of self-confidence...

Doc finishes off and goes to climb back into the DeLorean. Scott panics and rushes towards the car, yelling.

SCOTT

No! Stop! Wait!

DOC

Who the hell is that?

MARTY

What the hell are you doing here? You should be at home. Err Doc... this is my son.

DOC

He's out of prison?

MARTY

No, this is Scott, my youngest son.

DOC

Another son? Scott? Great!

MARTY

Scott, this is Doc, an old friend of mine.

SCOTT

I know; I've met him before.

MARTY

What do you mean you've met him before?

DOC

I've never seen this young man before in my life.

SCOTT

Not yet you haven't.

Doc and Marty look at each other puzzled and then back at Scott.

MARTY

I think you've got some explaining to do.

DOC

I think we may find some answers to what's been going on.

MARTY

Come on then Scott... Let's hear it.

SCOTT

Please don't be angry Dad. I sort of found your story you wrote. The story of your time travelling adventures. I decided to see if they were real.

MARTY

Oh no... Please tell me you didn't... Last Wednesday?

SCOTT

Yeah. I went to the square.

MARTY

I told you to stay away from there. What did you do?

SCOTT

Well... I accidentally... well... borrowed the DeLorean.

DOC

You did what? Great Scott!

SCOTT

I only borrowed it for a quick trip to see what you were like as a teenager Dad.

Marty snaps.

MARTY

Do you have any idea what you could have done? Most probably have done? Where did you go back to?

SCOTT

1985. October 27th.

MARTY

The day I got back from 18...

Marty looks at Doc and decides he shouldn't give too much away as Doc doesn't know anything about their trip to 1885 yet.

MARTY

18... 18 acres resort. The day I got back from the lake with your Mom. How long were you in 1985? Did you interact with anyone?

SCOTT

I lost my iPhone. I think I knew who took it. We just need to pop back in time and get it back and everything should be okay.

DOC

We need to go back to 1985 then. Come on Marty, you can punish the boy later.

SCOTT

Well actually. We need to go back to Halloween in 1925.

Marty and Doc look shocked.

MARTY

1925?

DOC

Get in. He can explain on the way. It's going to be a tight squeeze.

MARTY

It had better be good.

Scott sees Einstein and backs off from him.

MARTY

What're you scared of Scott? Einstein is a great dog, he wouldn't hurt a fly.

Marty strokes Einstein.

SCOTT

He might snap at me.

DOC

Don't worry about him. He'll only snap if you're up to no good or if he's looking after something for me.

Doc looks down the road.

DOC

I think I'm going to have to back up a bit. We don't have enough roads to get up to '88.

They all squeeze into the DeLorean with a bit of difficulty. Doc flicks the ignition and the car doesn't turn. He whacks the dashboard and it roars into life.

DOC

A little trick to get it started. I think there's a loose wire somewhere. Right, time circuits on... October 31st 1925. What time shall we say?

SCOTT

Well... The Halloween party in Courthouse Square began around 7pm, so if we get there about two or three hours before to work out what we need to do.

DOC

Halloween party? Sounds like fun. Okay. 4pm should do it then.

MARTY

Halloween 1925? And all I wanted was to go back a couple of days. I've got a very bad feeling about this.

DOC

Come on Marty, what happened to your sense of adventure in the last thirty years? It'll be a blast. Off we go.

Doc backs up the road, hits the gas and the DeLorean speeds down the street and disappears through time leaving two streaks of fire down the road.