Corrected entry: In the beginning scene, when Doc Brown sends his dog one minute into the future, a minute later, they see the DeLorean again. But the reality is that they wouldn't, because the car would have also still been a minute ahead of them.
A nameless member
30th Jul 2023
Back to the Future (1985)
30th May 2008
Back to the Future (1985)
Corrected entry: When Marty shows the video to the 1955 Doc, the 1985 Doc on the video states their location as the "Twin Pines Mall". Since Marty already knocked down one of the pines, the mall should've already been renamed to "Lone Pine Mall" on the video.
Correction: The timestream in the Back To The Future series is demonstrated as being somewhat resistant to changes; when Marty interferes with his parents' first meeting, he doesn't start to fade out for about a week after that happens. When Marty shows Doc the video, not enough time has passed for the effects of the timeline change to appear on the tape.
When someone time travels, they don't change the timeline they are from, they just create branching timelines every time someone makes a decision. This recording was made in the first timeline, so it would still be Twin Pines Mall.
That's not the case though. The photo Marty brings of his siblings fades out, newspaper headlines brought from the past/future change, etc.
Except he was slowly disappearing at the end of the movie. Which wouldn't happen if he was "branching off." They mix up linear timelines and parallel universes in these movies. They always, always screw up time travel movies.
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Correction: That's not how it works, at least in this movie. Einstein jumped a minute ahead instantly, Doc and Marty "catch up" after a minute of their normal time. Einstein isn't permanently a minute ahead of everyone else on the planet forever.