One of Back to the Future’s Most Confusing Questions Actually Has an Official Answer

A major sci-fi classic from the ’80s, Back to the Future is still discussed by fans for a variety of reasons, and some of them involve questions the entire trilogy left unanswered — whether it’s how time travel and timelines actually work, casting changes that may have impacted the direction of the story, the logic behind the DeLorean, and so on. But one question in particular that, interestingly enough, many people don’t even notice while others are still puzzled by it to this day is right there in plain sight. From the very beginning of the first film, we see Marty McFly (Michael J. Fox) and Doc Brown (Christopher Lloyd) together, ready to kick off the accidental journey that sends the protagonist back to the ’50s. But have you ever stopped to think about how they actually became friends?

The entire trilogy never really took the time to explain that, and for years, it mostly went unnoticed by audiences. But when you rewatch the movies, you start picking up on details that casual viewers never really question (and only hardcore fans tend to theorize about). The relationship between these two characters is simply there when everything starts, as if it had always existed. But who wouldn’t get curious about how it actually came to be, right? And the good news is that there is an official answer.

How Are Marty and Doc Brown Friends in Back to the Future?

If you think this was just a development oversight, the answer is no. In fact, as strange as it may seem, it was intentional, designed to throw you straight into their dynamic. But at the same time, you can’t just ignore it — after all, we’re talking about a regular teenage boy and a completely eccentric scientist who lives in total isolation in a lab. And that’s where the official explanation from Bob Gale, one of the film’s creators and screenwriters, comes in. Years after the trilogy ended, he decided to lay out what the story never actually showed about this specific question.

In 2011, Gale gave an interview to Mental Floss, and the answer is actually much simpler than most people would expect. “(…) We never explained it in the movie. But the history of the characters that Bob Zemeckis and I created is this… For years, Marty was told that Doc Brown was dangerous, a crackpot, a lunatic. So, being a red-blooded American teenage boy, age 13 or 14, he decided to find out just why this guy was so dangerous,” he explained. “Marty snuck into Doc’s lab, and was fascinated by all the cool stuff that was there. When Doc found him there, he was delighted to find that Marty thought he was cool and accepted him for what he was. Both of them were the black sheep in their respective environments.” And according to him, Doc eventually gave the boy a part-time job helping with experiments, lab duties, and taking care of the dog Einstein.

In other words, the origin of their friendship comes from Marty’s fascination, and it actually makes sense given both of their reputations. Marty doesn’t fully fit in at school or even within his own family, and the scientist is literally treated like a dangerous man by the entire town. So when they meet, there’s a mutual recognition and a really interesting partnership, despite the significant age gap. However, Back to the Future went through countless revisions before ever making it to the screen, and with that came many script changes. One of them involved both characters specifically, and it focused exactly on this origin story.

Earlier Versions of the Script Explained Their Friendship Differently

Before Back to the Future became a cinematic legacy and influenced several movies, it was a project that had to go through a long and difficult journey with studios. For years, Gale and Zemeckis made adjustments here and there to improve the story. And the original idea regarding Marty and Doc involved establishing the beginning of their friendship — but in a pretty wild way. Originally, this came from the concept of Marty being a much more opportunistic character. So the initial plan was for the scientist to hire the kid to sell bootleg VHS tapes at school. Since Marty would be the kind of character focused on making money, it made sense in that version of the story.

But thankfully, that idea was dropped — not only because it feels out of place in the final tone of the film, but also because it would reduce a relationship that works better when it’s driven by curiosity and identification, as it ultimately is. That alone makes you wonder what Back to the Future would have become. Even if it’s just a small detail, it changes everything, since the two of them are central characters in the story.

At the very least, things are a bit clearer now regarding their friendship. It’s a relationship that starts just because a curious kid ignores what he’s been told about the “town lunatic” and decides to check for himself. And the “lunatic” finds someone who doesn’t treat him like a joke. It’s simple, almost basic, but it works really well. And why exactly? Because a good film doesn’t need to explain everything. Cinema is the classic “Show, don’t tell.” If audiences enjoyed these characters for decades without ever needing to question their origin, it means the film’s intention worked: to pull you into the story from the very beginning. But still, it’s a curiosity that kept fans spinning theories, and it was worth having it officially confirmed once and for all.

What do you think? Leave a comment below and join the conversation now in the ComicBook Forum!

This Back to the Future Detail That Gets Rediscovered Every Year Is Why It’s Perfect