DuracellEnergizer said:

timdiggerm said:

DuracellEnergizer said:

You know all those other versions of Doc Brown and Marty that were glimpsed at/implied to have existed/presumed to have done their own mucking with the timestream but whose adventures were never actually followed within the main story of the Back to the Future films?

No, I don't.

Alright, let's see if I can make myself clear on this one ...

Remember at the end of the first BTTF, in the new timeline where the Libyans gun down the Doc without killing him? Well, the Marty of that timeline ends up going off on his own trip into the past, leaving the Marty of the original timeline, who now exists within the new timeline, to take his place.

Now, the million dollar question is this: where did that other Marty go? He must have also gone backward in time to 1955 and mucked with the timestream. What affect did he have on history, though, and what kind of timeline(s) did he end up creating? We never see this happen in the movies, but it must have happened, or time travel just doesn't make any sense in the BTTF Universe (well, it already makes no sense, but anyway).

What do you mean? It's the same Marty! He goes back in time to 1955, has a bunch of adventures involving his parents, tries to give Doc a note saying the Libyans will kill him because he just saw Doc get shot. No problem.