Back to the Future Part II is fiction.
Back to the Future Part II is a 1989 American science-fiction adventure comedy film directed by Robert Zemeckis and written by Bob Gale . After repairing the damage to history done by his previous time travel adventures , Marty McFly ( Fox ) and his friend Dr. Emmett `` Doc '' Brown ( Lloyd ) travel to 2015 to prevent McFly 's future son from ending up imprisoned . Martin `` Marty '' Seamus McFly is a fictional character and the main protagonist of the Back to the Future trilogy .