The Back to the Future trilogy is a comedic science fiction film trilogy written by Bob Gale and Robert Zemeckis, directed by Zemeckis, and distributed by Universal Pictures. The plot follows the adventures of high-school student Marty McFly (Michael J. Fox) and scientist Dr. Emmett Brown (Christopher Lloyd) as they use a modified De Lorean automobile to time travel to different periods in the history of Hill Valley, California.