A behind-the-scenes look at the making of Back to the Future Part II (2). Back to the Future Part II is a 1989 American science fiction film directed by Robert Zemeckis and written by Bob Gale, who also co-developed the story. A sequel to the 1985 hit Back to the Future, it is the second installment in the iconic trilogy. The film stars Michael J. Fox, Christopher Lloyd, Lea Thompson, and Thomas F. Wilson, with Elisabeth Shue and Jeffrey Weissman taking over supporting roles played initially by Claudia Wells and Crispin Glover. The story follows Marty McFly (Fox) and Dr. Emmett "Doc" Brown (Lloyd) as they travel from 1985 to the year 2015 to prevent Marty’s son from making a mistake that could ruin the family's future. Their mission goes awry when Biff Tannen (Wilson) steals the DeLorean and uses it to alter history for personal gain. Marty and Doc must return to 1955 to correct the timeline and restore order. Although the filmmakers consulted scientific predictions to imagine what ...