Back to the Future 3
Image Works, 1991
Marty's in big trouble. Having returned to 1955 to try and stop the evil Biff from changing the future for his own benefit with the aid of a stolen sports almanac, he and Doc Brown have managed to do just that.
But when the flying DeLorean with Doc inside is hit by lightning and disappears, Marty is left stranded in 1955. His troubles are far from over. Seconds after the Doc's disappearance, Marty receives a letter from him - dated 1885. After being catapulted back to the old West by the lightning bolt, Doc has decided to settle down there as a blacksmith, explaining that he's quite happy there and wants no help from Marty. Also included in the letter are specific instructions on how to find the DeLorean (which Doc has hidden in a disused mineshaft) and use it to get Marty back to 1985. But when Marty and Doc return to the mineshaft to recover the DeLorean, they discover, in the nearby graveyard, a headstone with Doc's name on it - dated just a few days after his letter to Marty!
Realising he has to save the Doc before he is killed, Marty uses the DeLorean to travel back to 1885...