Back to the Future Part II is a 1989 film and the first sequel to the 1985 film Back to the Future. Like the previous film, it was directed by Robert Zemeckis and written by Zemeckis and Bob Gale. Part II and the third installment of the trilogy, Back to the Future Part III, were filmed back-to-back and released six months apart. Although released in 1989 and 1990, both films continued to portray 1985 as the present.

Part II follows the continued adventures of Marty McFly and "Doc" Emmett Brown as they use their time-traveling De Lorean, which is now capable of flight, to travel to a retro-futuristic version of 2015, an alternate 1985 and the principal setting of the first film in 1955. The film ends with a cliffhanger that is resolved in Part III.

The second part of the trilogy begins as Doc, Marty and Jennifer take the time-traveling DeLorean into the year 2015 to straighten out the future of the McFly family. But Biff Tannen steals the time machine and gives his younger self a book containing 50 years of sports statistics, which the young Biff uses to amass an enormous gambling fortune and transform idyllic Hill Valley into a living hell. To restore the present, Doc and Marty must return to the events of their previous adventure in 1955 and retrieve the book. Written by David Thiel

Marty McFly and Doc Brown make an exhilarating visit to the year 2015 seemingly to resolve a few problems with the future McFly family. But when the two return home, they soon discover someone has tampered with time to produce a nightmarish Hill Valley, 1985. Their only hope is to once again get back to 1955 and save the future. Written by Robert Lynch

This movie picks up where the last one left off; with Doc Brown and Marty going into the future to help Marty's future offspring. After doing that they returned to their own time, only to discover that things have changed. They discovered that while in the future, Marty's nemesis, Biff Tannen got the sports book that Marty bought so that he could know the results of sports events and make a killing, but Doc Brown nixed his plans, but Tannen who overheard their conversation, got the book and the time machine and went back into the past and gave the book to himself, who has not only amassed a fortune but also extremely powerful. So Doc and Marty have to go back to when Biff got the book and get it away from him. And it seems that it was in 1955 on the night of the dance that Biff got the book. So not only must they get the book but they must also avoid the other versions of themselves. Written by rcs0411@yahoo.com