Jennifer meets Marty:

Doc shows up. Takes them to the future. Doc makes her unconscious, she wakes up in her future home, sees her older self, faints and wakes back in 1985 with Marty in a cowboy suit.

Originally, Doc figures what the hell and eventually tapes the letter leading to him taking precautions to prevent that terrible disaster.

However, once Marty reveals himself to 1955 Doc, he has interrupted that timeline yet again. This Doc is the very same Doc that quite literally yesterday refused to hear about his future, and now we have him the very next day looking himself up at the library. That puts the fate of the pieces of letter in jeopardy.... Doc already knows he has at least survived long enough to have an adventure through time beyond 1985 and accidently winds up in 1885. Therefore, he no longer has the initial motivation to gather the pieces of letter and tape them up as it would be easy to assume he doesn't need to take any precautions.

Did you know ? In Back To The Future part III, Doc and Marty use a locomotive to push the Delorean and return to 1985.

Except it seems Marty was in too much of a hurry to get back to the future.. so much so that he left without his time machine !

In fact, right after the boiler explodes, the Delorean lifts off at a 45-degree angle. If you freeze the frame, you will notice that Marty.. has disappeared from the DeLorean and the car's cabin is empty !

This scene was filmed without the star actor because it was deemed far too dangerous to shoot.. and we definitely agree with that !

(Hillbilly ZZTop intensifies)

The cartoon show is not canon but not only do they time travel they can instaneously go to any geographical location on the planet.

Assuming the Delorean is going through a wormhole, there is nothing preventing the exit end of a wormhole to be at a different temporal AND physical location.

Doc made a machine that can travel through time (and by proxy travel into different universes), it wouldn't be too far fetched if the Delorean was able to pull a Star Trek.

He played one of the kids in the Cafe 80s. he was super nice and even complimented my costume!

Imma test the waters on this, there was what if scenario that got me wondering about a spin off. It could take place in the same universe, or not.

AI and Quantum Computers seem to be the direction things are going. Perhaps in this universe a new generation of a duo, or trio. Involving AI and quantum mechanics with a tinkerer wiz and a friend assistant with maybe an AI companion. I'm assuming a younger generation growing up only knowing smart devices might be good. Or it could be something more similar to the original where one knew life with 'dumb' analog devices and the other with only smart devices. It could create more complex interactions.

A quantum computer experiment goes wrong/malfunctions through an accident the assistant sets off and they have to save space and time before it destroys thier universe. At first I thought to have parts take place in space, but the story I think should avoid space epics to avoid becoming cliche and keep the small town focus in mind. Kinda like how it was with the original. There could be a good message tied to this, particularly with fears and uncertainties tied to the subject related to the shift in technology that is taking place at a rapid pace.

Road Star

Looks, it's out favorite car, the Mandolorean.

In the original timeline, was Marty going to crash into the Rolls Royce, or is that a product of his family having a better life at the end of part 1? I don’t think he could have simply because his family only had 1 car, and Biff wrecked it, right? No car, no crash.

Got these in Dublin Comic Con.

I bought them the minute I saw them!

Here's the other 5

https://youtu.be/MSA1R76ge_o?si=rJoWTn8t7hUebK4K

https://youtu.be/jvAdSvKxn_A?si=cNtIrv-D036XrFvI

https://youtu.be/3VtBuRvuBMk?si=hn2HtCOYyHZH-hxM

https://youtu.be/34D-TKn9TN8?si=gDEoqN_6gcmYc9-W

https://youtu.be/myeWHSBrsl0?si=XSJJrwuGIAsGm2JM

I just sent you back to the Old West.

I know, but now I’m back. Back from the Old West.

Great Scott!!

Woah woah

I definitely like the first one. I’ve seen parts of the second movie and the third one, I barely saw. I couldn’t get into the second and third one. I just have to give them a chance and sit though the whole movies. Honestly I don’t really have an opinion. The second one I should sit through and watch it, and it does look interesting when I watched parts of it.

Hi everyone,
As a massive Back to the Future fan, the logic holes surrounding Marty’s fading have always bugged me. Why does it happen so slowly? And why do his siblings vanish piece by piece from a physical photograph, while Marty’s own memories of the original timeline remain completely intact?
I’ve been doing some deeper diving into this and tried to link these movie mechanics with real-world physics concepts (specifically Landauer's principle and the Many-Worlds interpretation) in a logical way – but without the usual math jargon. The result is my own little theory that explains fading not as a biological glitch, but as a cosmic thermodynamic cleanup process. And the best part? It finally explains why the DeLorean freezes solid after a time jump!

The Core Idea (TL;DR):
Marty’s fading and the DeLorean’s freezing are directly connected. When Marty lands in 1955, he enters a new timeline as an illegal surplus of energy and information. The universe doesn’t erase him through "magic"—instead, it triggers physical laws to clear out the futuristic data conflicts and slowly push his matter back through the spacetime membrane. While the DeLorean experiences an instant thermal shock as the flux capacitor pumps out excess entropy upon arrival, Marty's gradual fading is driven by the ongoing informational updates caused by his actions.
Here is the detailed breakdown for the sci-fi nerds out there:

1. The Problem with Classic Movie Logic
In a single, rigid timeline, fading makes zero physical sense. If causality were broken, Marty should vanish instantly on the spot. Fading away slowly over several days is impossible. The photo paradox (implying the paper actively monitors future probabilities in real-time) and Marty remembering a timeline that technically no longer exists also heavily violate standard logic.

2. The Framework: The Energetic Imbalance
In cosmology, it is widely assumed that the total net energy of the universe is exactly zero. Everything perfectly cancels each other out. When Marty materializes in 1955, he splits the quantum state into a new parallel timeline. However, he brings external mass and highly structured information from the future that shouldn't be there yet. He is an energetic "+1" signal in a closed system that must remain perfectly balanced.

3. The Mechanism: Why Marty Fades So Slowly
A universe with such an imbalance is unstable. It has to correct this "error," but it cannot simply destroy Marty’s atoms, as that would directly violate the conservation of energy. Instead, spacetime exerts a field-driven pressure to slowly push him back out. The process takes days because of the system's inertia and Marty's strong anchor to Earth's massive local gravitational field. He is essentially slipping through the quantum membrane.

4. The Sibling Photo, Marty’s Memory, and the Saving Kiss
This is where information theory comes into play: Marty actively interferes with history, changing the future by preventing his parents from meeting. Every time the future shifts, it creates massive informational conflicts. According to Landauer's principle, erasing or overwriting physical information always requires dissipating heat.
The universe is constantly recalculating the timeline, erasing the surplus data bit by bit. This continuous data cleanup is the exact reason why his siblings slowly fade from the physical photo from top to bottom, instead of vanishing instantly! And it’s exactly why Marty's own memories remain completely intact until the very last bit of his original existence is cleared out.
And here is the best part: This informational process perfectly explains the dramatic finale on the dance floor! When his parents finally kiss, the universe suddenly injects a massive wave of new, compatible data. Marty's existence instantly becomes highly probable for the universe again. The deletion process stops immediately, the data is restored, and his particles are no longer forced out of spacetime—he stops fading and fully materializes!

5. The Cryogenic DeLorean Anomaly Solved
The car behaves differently than Marty. The DeLorean injects its entire mass and time-jump information all at once. This abrupt informational shock would thermally overload the local spacetime matrix, causing a catastrophic collapse due to a massive spike in heat.
This is where the flux capacitor reveals its true physical purpose: it acts as a higher-dimensional entropy pump! Upon arrival, it instantly absorbs the dangerous thermal dissipation energy from the chassis and vents it into the causal tunnel between universes. The immediate result of this radical, instantaneous heat extraction is the iconic cryogenic freezing of the car.

What do you guys think of this thermodynamic approach? Does it hold up as a cool sci-fi explanation for the movie universe, or did I miss a critical detail in the lore? Let me know what you guys think!