Back to the Future Part III

An American science fiction–comedy film series that follows the adventures of a high school student, Marty McFly and an eccentric scientist, Dr Emmett L. Brown as they use a DeLorean time machine to time travel to different periods in the history of Hill Valley, California.
The final installment of the Back to the Future trilogy finds Marty digging the trusty DeLorean out of a mineshaft and looking for Doc in the Wild West of 1885. But when their time machine breaks down, the travelers are stranded in a land of spurs. More problems arise when Doc falls for pretty schoolteacher Clara Clayton, and Marty tangles with Buford Tannen.
They've saved the best trip for last... But this time they may have gone too far.