Emmett Brown

Verified Timeline

Lore & Background

Emmett Brown is a white-haired scientist who is called "Doc" by his teenage friend Marty McFly. He was created as a mad scientist archetype. Despite his many failed inventions, he successfully makes time travel possible, by building a time machine out of a DMC DeLorean. Gale stated that Doc Brown met Marty when the teenager was about 14 years old. Marty sneaked into Doc's lab after learning that he was considered a lunatic and was discovered there by Doc. Marty considered Doc to be cool and this resulted in Doc hiring Marty as his part-time lab assistant. Doc was born into a wealthy family and in 1955 lives in a mansion, but spends thirty years burning through his wealth to realise his vision of time travel. By 1985, his mansion has been destroyed by fire, so he subsequently resides in the mansion's garage. Doc's garage is packed with gadgets and he has an impressive clock collection. Although he is American and a baseball fan, Doc's father was German and his family name was Von Braun. Doc Brown's friendship with Marty is a central aspect of the film trilogy. Marty typically seeks out his friend each time he finds himself in a perilous situation, knowing that Doc will provide a solution. Doc not only takes the role of Marty's sidekick, but also provides much of the comic relief. He is shown to be selfless by nature, often putting his life in danger to help his friend because he believes in doing what is right. Whenever he makes a new discovery, he typically expresses his astonishment by exclaiming the catchphrase "Great Scott!". Lloyd described Doc Brown as a positive character who is inventive and energetic. He said that he loved the character's passion and excitement in discovering new things. Doc's positive influence on Marty encourages him to mentor his father George in 1955 and influence him into becoming a novelist, which in turn results in the success of the McFly family in 1985. This positivity is articulated in Doc's line, "If you put your mind to it, you can accomplish anything", which Marty later repeats to George. Gale said that Doc's friendship with Marty is based on mutual respect, as both characters find a connection with each other being rebellious by nature. He explained, "Doc thinks, 'Hey, Marty is a kid who maybe I can give him something, he's the son I never had. He's inquisitive, he doesn't judge me'." Doc Brown is eccentric but also a genius. He tells Marty that he invented time travel in November 1955 by accident. While trying to hang a clock in his bathroom by standing on the toilet, he slipped, banged his head and while he was knocked out had a vision of the flux capacitor, the component that makes time travel possible. In 1985, he uses stolen plutonium to create a "nuclear reaction to generate 1.21 gigawatts of electricity" to power the DeLorean and enable it to time travel. Upon realising that plutonium is impossible to obtain in 1955, the younger Doc decides that the only other way to power the DeLorean is with a bolt of lightning. When conducting his science experiments, Doc Brown often uses his pet dogs as test subjects. In 1985, he tests the DeLorean by sending his dog Einstein one minute into the future. When Marty meets up with the younger Doc Brown in 1955, his dog is named Copernicus and is used as a test subject for Doc's "brain wave analyzer".

In Their Own Story

In Back to the Future, he introduces Marty McFly to the DeLorean time machine that he invented, which results in Marty being accidentally transported back to the year 1955. He returned alongside Marty in Back to the Future Part II, in which they travel into the future to 2015. In Back to the Future Part III, he is accidentally transported back to 1885 and there builds another time machine using a steam engine locomotive. In Back to the Future Part III, Doc Brown develops a relationship with Clara Clayton in 1885, a character portrayed by Mary Steenburgen. Despite being an experienced actor of 15 years, Lloyd needed to speak to Zemeckis before filming a scene in which he kisses her, to explain that he had never before had an onscreen kiss. Gale opined that Lloyd was effective in the part of a romantic male lead. Zemeckis said that during production of the first film, they decided to write a scene to explain Doc Brown's disinterest in women, in which he is forced to choose between a relationship and science and ends up choosing science. The scene was eventually left out of the second film. Zemeckis explained that the third film illustrates the character's growth from an eccentric to a man capable of falling in love: "he gets in touch with that boyish, romantic, innocent part of himself".

Reader's Guide

More than a scientist, Doc Brown is the soul of the Back to the Future saga—a brilliant, messy genius who becomes Marty McFly's closest ally. While his inventions often spark chaos, from DeLorean dashes to paradoxes, Doc provides the guidance needed to fix them. He isn't just a mentor; he's a partner in crime across time. Building impossible machines from scrap, Doc masters physics that would baffle any academic, though his methods are pure improvisation. He learns that science isn't just about equations; it's about people. Doc's true evolution is emotional rather than technical. He starts as a man afraid of consequences, hiding from the town council, but grows into someone who accepts risk for love and friendship. His famous line—"your future hasn't been written yet"—captures his shift from fearing time to embracing it.

Did You Know?

• Doc Brown was loosely inspired by Leopold Stokowski and Albert Einstein.
• The Back to the Future novels state that Emmett Brown was born in 1920, placing him at the age of 65 in 1985.
• Christopher Lloyd was 46 years old at the time of filming Back to the Future, so makeup artists made him look older.
• Doc Brown's catchphrase "Great Scott!" was suggested by Robert Zemeckis; Bob Gale initially thought he would use "Great Caesar's Ghost!" from a Superman TV series.
• Doc Brown's father was German and his family name was Von Braun.