Back to the Future (1985)
Seventeen-year-old Marty McFly is accidentally sent back in time from October 26, 1985, to November 5, 1955, in a time machine built from a DeLorean by eccentric scientist Emmett "Doc" Brown, when they are attacked and Doc is apparently killed by Libyan terrorists from whom he stole the plutonium that gives the flux capacitor the 1.21 gigawatts it needs to time-travel. Soon after his arrival in 1955, Marty's mother, Lorraine, falls in love with him, rather than with his father George McFly, threatening to cause a paradox that would prevent Marty's existence. Without plutonium to power the time machine, Marty must find the 1955 Doc Brown to help him reunite his parents and return to 1985.
The efforts of Biff Tannen, George's bully and supervisor, further complicate Marty's situation until Marty successfully causes his parents to fall in love and simultaneously convinces George to finally stand up to Biff. Returning to the future via a lightning strike that powers the machine, Marty discovers a vastly improved situation for the McFly family, as a much more confident George has become an accomplished science fiction author, Marty's two older siblings have better lives, he owns the car of his dreams, and an apparently-softened Biff is now an auto detailer, rather than George's supervisor. Despite 1955 Doc's insistence on not knowing details of the future, a note Marty leaves in his pocket on November 12, 1955, prevents him from being killed by the terrorists. In the film's final moments, Doc Brown appears in a modified version of the DeLorean and tells Marty and his girlfriend Jennifer Parker that they must travel to the future to fix a problem caused by Marty and Jennifer's kids.
Back to the Future Part II (1989)
The series continues as Doc Brown travels with Marty and Jennifer to the year 2015, where he has discovered Marty's family is in ruins. Shortly after rectifying the situation, Marty buys a sports almanac containing the outcomes of 50 years (1950–2000) worth of sporting events to make easy money. However, Doc talks him out of it and throws the almanac in the trash bin, where the 2015 Biff Tannen finds it. A sleeping Jennifer has been taken by police to her future home, needing Marty and Doc to retrieve her before returning to 1985. While Marty and Doc are at the 2015 McFly home, 2015 Biff steals the DeLorean time machine and gives the book to his 1955 self just before he goes to the dance at the end of the first film. When Doc and Marty return to 1985, they find that Biff has used the sports almanac's knowledge for financial gain, which allowed him to turn Courthouse Square into a casino with 27 floors, take over Hill Valley, get away with the murder of Marty's father, and later marry Marty's mother. Marty learns that Biff was given the book by 2015 Biff on November 12, 1955, so he and Doc go back to that date in order to steal the almanac from Biff before he can use it to destroy their lives. They accomplish this in a complex fashion, often crossing their own past selves' paths. When the duo is about to travel back to 1985, a lightning bolt strikes the DeLorean and activates the time circuits, sending Doc back to 1885 and leaving Marty stranded once again in 1955.
Back to the Future Part III (1990)
After finding out that Doc Brown was trapped in 1885, Marty and the 1955 Doc find and fix the DeLorean. Learning that Doc gets shot in 1885 by Biff's great-grandfather, the outlaw Buford "Mad Dog" Tannen, Marty travels back in time to save Doc (who has become a blacksmith) and bring him back to the future. Arriving in the middle of a chase between the United States Cavalry and American Indians, Marty is forced to flee to a cave, discovering the DeLorean's fuel line is torn. Marty convinces Doc to come back with him and find a way to get back to his time before it is too late, but Doc is smitten after saving schoolteacher Clara Clayton. After running afoul of and defeating Buford Tannen and several dramatic action scenes involving using a speeding locomotive to push the DeLorean to 88 miles per hour (142 km/h), Marty returns to 1985 without Doc Brown. When the DeLorean appears in 1985, a modern train destroys it, with Marty barely escaping. Reuniting with Jennifer, Marty avoids a street race and the two visit the scene of the wreckage of the DeLorean. Suddenly, Doc, Clara and their children appear in a time-travelling steam locomotive. Doc reminds Marty and Jennifer that "[their] future is whatever [they] make it", so they must "make it a good one". The locomotive lifts off the tracks and departs from 1985, ending the trilogy.
English (UK)
