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.
I guess time travel in the BTTF Universe actually does create parallel, co-existing timelines after all.
What noooooooooooooooooooooo