Emmett Brown

Dr. Emmett Lathrop "Doc" Brown, Ph.D., is a fictional character in the "Back to the Future trilogy". He is the inventor of the first time machine. He builds it out of a DeLorean sports car. 
The character is played by Christopher Lloyd in all three movies, as well as in the live action sequences of the "". He is voiced by Dan Castellaneta in the animated series. The character's appearance and actions are loosely inspired by Leopold Stokowski and Albert Einstein. In 2008, Dr. Emmett Brown was selected by "Empire" magazine as one of "The 100 Greatest Movie Characters of All Time", ranking at #76. 
Lloyd played Brown once again in Seth MacFarlane's 2014 comedy western movie, "A Million Ways to Die in the West".