Emmett Lathrop Brown, Ph.D., commonly referred to as "Doc Brown", is a fictional scientist character in the Back to the Future franchise. In the world of the franchise, he is the inventor of the world's first and second time machines, the first constructed using a 1981 DeLorean sports car, and the second constructed using a steam engine locomotive.

Back to the Future is an American science fiction comedy franchise created by Robert Zemeckis and Bob Gale. The franchise follows the adventures of a high school student, Marty McFly, and an eccentric scientist, Dr. Emmett "Doc" Brown, as they use a DeLorean time machine to time travel to different periods in the history of the fictional town of Hill Valley, California.