Back to the Future Part II is historical 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 . Science fiction film ( or sci-fi ) is a genre that uses speculative , fictional science-based depictions of phenomena that are not fully accepted by mainstream science , such as extraterrestrial lifeforms , alien worlds , extrasensory perception and time travel , along with futuristic elements such as spacecraft , robots , cyborgs , interstellar travel or other technologies .