Back to the Future is a 1985 science fiction–comedy film directed by Robert Zemeckis and produced by Steven Spielberg. Zemeckis wrote the story, along with Bob Gale. It stars Michael J. Fox as teenager Marty McFly and Christopher Lloyd as scientist Dr. Emmett L. Brown.

The film's basic storyline involves the premise of time travel being used to breach the generation gap. In a De Lorean time machine invented by Dr. Brown, Marty accidentally travels back to the year 1955 when his parents were teenagers. Having interfered with their first meeting, Marty must ensure that his young parents fall in love so that he will be born. Furthermore, the Dr. Brown of 1955 must find a way to return Marty to 1985 without the plutonium necessary to fuel the journey.

The film opened on July 3 1985, and grossed U.S. $210 million at the U.S. box office, making it the highest grossing film of 1985. The film was followed by two sequels, Back to the Future Part II in 1989 and Back to the Future Part III in 1990, forming a trilogy. On December 17, 2002, Universal Studios Home Entertainment released the film on DVD and VHS as part of Back to the Future: The Complete Trilogy.

Due to the film's success, three spin-off projects were made. CBS TV aired an animated series, Back to the Future: The Animated Series and Harvey Comics released a handful of similarly styled comic books, although their stories were original and not merely duplicates of the films. In 1991, Universal Studios Theme Parks opened a simulator ride based on the series called Back to the Future: The Ride. The ride closed on March 30, 2007 in Orlando, FL, and September 3, 2007 in Hollywood, California. The ride remains open at Universal Studios Japan.

The year is 1985 and Marty McFly (Fox) is your everyday teenager, except for one problem. He is stuck in 1955. After his good friend Doc Emmett Brown (Lloyd) is gunned down, Marty ends up sending the DeLorean back twenty years into the past. Now, he must find the Doc and convince him that he is from the future, in order for the Doc to send him back to the future, but this is the least of Marty's problem. After accidentally getting in the way of the important meeting between his future mother (Thompson) and father (Glover), Marty must get them back together before he changes time forever, and destroys his own existence. Written by simon

In the life of Marty McFly, all is not well. His family is dysfunctional, his school punctuality is questionable and the music he likes and plays is just too darn loud. His one true light is his girlfriend Jenny and his one true friend is the somewhat off-kilter Doctor Emmett Brown. In a request from Doctor Brown, Marty meets the mad scientist and discovers that his friend has built a time machine out of a DeLorean. From there, Marty's humdrum life becomes literally a blast from the past as he is transported to 1955. A stranger in a strange yet familiar land, Marty must seek out Doctor Brown to help send him back to his own time while simultaneously ensuring that his parents meet and fall in love. Written by Vampire Sharpshooter

Marty McFly helps out his friend Doc Brown, and ends up being taken back in time by Doc's time-machine. Marty, a boy of the 80's, has to come to grips with being in the 50's and get his parents to fall in love to set straight the damage his presence has done to the events of the past. Written by Greg Bole

Marty McFly, a typical American teenager of the Eighties, is accidentally sent back to 1955 in a plutonium-powered DeLorean "time machine" invented by slightly mad scientist. During his often hysterical, always amazing trip back in time, Marty must make certain his teenage parents-to-be meet and fall in love -- so he can get back to the future. Written by Robert Lynch

Marty McFly is an aspiring musician, but he is not sure of what the future holds for him; first his band was rejected as the performing band for the school dance, and historically, no McFly has succeeded in anything. The only bright spots in his existence are his girlfriend and Emmett Brown, the town crackpot scientist, who is Marty's good friend. Marty was helping brown with his latest invention a time machine, which is fitted into a Delorean. The time machine needs a tremendous amount of power to work, which he gets from plutonium. Now Brown got the plutonium from some Libyans who want him to build a bomb; they find Brown and shoot him, Marty gets into the Delorean and drives off and when he reaches the speed of 88 mph that activates the time machine, he finds himself in 1955, cause that was the date that Brown entered, which was when he first conceived the time machine. Now having already used up all the power of the plutonium, Marty must find a way to get it working, so he can go back to his own time. Marty looks for Brown but before he does, he runs into his father as a teenager, and accidentally interferes with his father's first meeting of Lorraine, his future mother. Marty then goes to see Brown and convinces him that he is from the future and to help him. But when he learns of the amount of power that is needed to power the machine, he tells Marty that it's hopeless cause the only other thing that can generate that much power is a bolt of lightning and it's impossible to determine when and where they will strike, but Marty has with him an old newspaper cliping that states that the town clock tower will be struck by lightning, so they plan to draw the energy from the lightning so they can power the machine. But before they do, Marty must act as cupid for his parents cause it seems that because they never met they won't fall in love and get married and Marty will not exist. Written by rcs0411@yahoo.com