Marty: A month? Doc, you're gonna get shot on Monday!

Doc moves to a window. Outside we can see the railway station. Next to the window is a calendar with the date - September 4th 1885 - on it. Doc turns around to face Marty again.

Doc: I know, I know, I know! I wish..... wait, I've got it! We can roll it down a steep hill..... no, we'd never find a smooth enough surface. Unless..... of course..... ice! We can wait until winter when the lake freezes over...

Marty: Winter! Doc! Monday! It's three days away!

Doc: Wait. Let's just think this thing through logically. We know it can't run on its own power, and we know we can't pull it. But, if we can figure out a way to push it up to 88 miles per hour... huh?

Outside, we can hear a train whistle. A steam engine pulls into the station. Doc looks outside and spots it.

Doc: That's it!

Cut to the station. Doc and Marty are talking to the train engineer.

Engineer: How fast she can go? Why, I've powered her up to 55 myself. I hear that fearless Frank Fargo got one of these up to near 70 out past Verde Junction.

Marty: Is it possible to get it up to 90?

The engineer laughs.

Engineer: 90? Tarnations, son, why'd ya ever be in such a hurry?

Doc: (covering) Well, it's just a little bet that he and I have, that's all. Theoretically speaking, could it be done?

Engineer: Well, I suppose if you had a straight stretch of track with a long level grade, and you weren't hauling no cars behind you - and if you could get the fire hot enough, I mean hotter than the blazes of hell and tarnations - well yes, you might be able get her up that fast.

Doc: When's the next train coming through here?

Engineer: Monday morning at 8 o'clock.

Cut to the waiting area. Doc and Marty are looking at a map of Hill Valley. The clock for the clocktower is on the platform - it's just been delivered. And the time on it is 10.04am! CLARA CLAYTON can also be seen waiting for someone to pick her up, although neither Doc nor Marty see her. As Doc describes the places, he shows Marty on the map.