The Back to the Future film trilogy and subsequent animated series feature characters created by Robert Zemeckis and Bob Gale. The lead character of the series is Marty McFly. During the course of the trilogy, he travels through time using a DeLorean time machine invented by his friend Emmett Brown. He also encounters the central antagonist, Biff Tannen, in several different time periods and visits his ancestors and descendants. Main characters Marty McFly Martin Seamus "Marty" McFly (portrayed by Michael J. Fox in the films and voiced by him in Lego Dimensions, voiced by David Kaufman in the animated series) is the son of George McFly and Lorraine Baines McFly. Marty travels between the past and the future, encountering his ancestors and descendants. Marty and his friend Doc Brown help restore the space-time continuum while encountering Biff Tannen (or members of the Tannen clan) at various points in time. Emmett "Doc" Brown Doctor Emmett Lathrop "Doc" Brown (portrayed by Christopher Lloyd and voiced by him in Lego Dimensions, voiced by Dan Castellaneta in the animated series) is the inventor of the DeLorean time machine. At various points in time, Doc helps Marty restore the space-time continuum and reverse the changes that were caused by time travel. In 2008, the character was selected by film magazine Empire as one of The 100 Greatest Movie Characters of All Time, ranking at No. 20. George McFly George Douglas McFly (portrayed by Crispin Glover in Back to the Future, Jeffrey Weissman in Back to the Future Part II and Back to the Future Part III, voiced by Michael X. Sommers in Back to the Future: The Game) is married to Lorraine Baines McFly and is the father of Marty, Linda and Dave. Although he is one of the main characters in the first movie, George only makes cameos in Back to the Future Part II and Back to the Future Part III. In the first film, George is portrayed as weak and the main target of Biff Tannen's bullying. The novelization of the film expounds on George's history of weakness, describing two incidents in which he is unable to stand up for himself. In 1955, in contrast with Marty, George did not have any friends for support and was targeted not only by Biff and his gang but also other kids in school. He has a penchant for science fiction, and writes some of