Fictional character in the Back to the Future franchise
Dr. Emmett Lathrop Brown, commonly referred to as "Doc Brown", is a fictional scientist in the Back to the Future franchise. He was created by Robert Zemeckis and Bob Gale. First appearing in the 1985 film Back to the Future, he is an eccentric mad scientist and friend to the protagonist Marty McFly. In the franchise, he invents a time machine using a DMC DeLorean. He is portrayed by Christopher Lloyd in all three films and in the television series and was loosely inspired by Leopold Stokowski and Albert Einstein.
https://en.wikipedia.org/wiki/Emmett_Brown