Doc: The only power source capable of generating 1.21 gigawatts of electricity is a bolt of lightning.
Doc: A bolt of lightning! Unfortunately, you never know when or where it's ever going to strike!
[Marty holds out the "Save the Clock Tower" flyer]
Marty: We do now.
In 1955, when George walks into his house, Marty thinks of Mystery Science Theatre and looks at the vanishing photograph, and at the dance, after George punches Biff and rescues Lorraine, again Marty looks at the vanishing photo. In these two close-ups the thumb holding the photo looks nothing like Marty's thumb/nail in other close-ups, such as when he powers up the amp at Doc Brown's at the start. See more...
In 1985 Doc is living in what was in 1955 his garage/workshop after the Brown mansion burned down (note the newspaper clippings at the start). Looking at the appearance of it in the different years you can see that they are same place. This also explains why Marty looked at the garage so intently when he first arrives at Doc's house in 1955, he must have been surprised to learn this. See more...
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The entry you are marking as a duplicate is:
|Title||Back to the Future|
|Original entry||Right when Marty returns to 1985, and has to run back to the mall, we see him call the drunken bum on the bench "Red". In 1955, "Red" is the first name of the mayor running for re-election in one of the first shots of the town we see.|