Back To The Future: The Infinitely Ickier Ending...

[Volpone]

After the discussion of temporal paradoxes, I got to thinking about "Back to the Future." What if, instead of going back to the future, Marty just stays, settles down with his Mom and raises a family, only naming his youngest Marty Jr. They stick Doc Brown's car in the garage and drag it out when it is time to send it to the past, Marty can still warn Doc about the Libyans and they can use the money he'd have spent to invent the car to build another car.

The only real flaw I can see is Marty's kids, being horribly inbred, might wind up mildly retarded. So when it is time for Marty Jr. to go back...no, it should be fine. Because he's still going back. Or wait. The timeline still works, but each time going forward, the McFly kids get more and more inbred. Oh, and Doc and Marty probably have to murder young George and hide his body.

Ick.

 

[CaptainWacky]

Red Dwarf already did it: https://en.wikipedia.org/wiki/Ouroboros_(Red_Dwarf)

 

[The Question]

There was a time travel before the one we see in BTTF. Originally, it was Marty Tannen who went back. He hated his father (as teenagers sometimes do) and so hung out with somebody as un-like his father as he could find: Doc Brown.

Movie proceeds as before until the accident that sends Marty Tannen back to 1955. He seizes the opportunity -- not to ensure that George McFly will be his dad but merely to ensure that Biff Tannen won't be. Thus you end up with Marty McFly, who is actually repeating what Marty Tannen did. That's what we see in the first film.

We're actually dealing with a story that's way deeper than the one we see in the film -- but the evidence of that backstory is the entire story we do see.

Here's how:

The Marty McFly we watch in BTTF is traveling backward into the original timeline that resulted in Marty Tannen. Until Marty interferes, the trajectory we see Biff Tannen and Lorraine Baines on will end up with those two getting hitched; George McFly in that timeline is a total pussy who would never have stood up to Biff to take Lorraine away from him. In fact, until Marty shows up, George isn't even interested enough in Lorraine to make the attempt. That would have resulted in Marty Tannen.

Marty Tannen goes back from, let's call the two tracks 1985A to 1955B. His actions in 1955B result in the creation of Marty McFly by 1985B. At which point Marty goes back to 1955A and eliminates Marty Tannen from 1985A.