In the movie Back To The Future Part II, the main character, Marty McFly, travels 30 years into the future with scientist, Dr. Emmett “Doc” Brown. The movie starts with Doc returning from the year 2015 to 1985 and notifying Marty (who at that time is 17 years old and in high school) that they have to go “back to the future” to help Marty’s (future) son.