In 1955, Marty McFly receives a message from his friend Doc Brown, leading him to the DeLorean time machine. But when he discovers Doc's predicament in the old west, Marty travels back in time to rescue him from a gang of thugs and help him win the heart of a schoolteacher.

Back to the Future Part III
Marty McFly travels back in time to 1885 to rescue his friend Doc Brown after learning that Doc has perished in 1955.