Doc: "'I have buried the DeLorean in the abandoned Delgado Mine, adjacent to the old Boot Hill Cemetary as shown on the enclosed map. Hopefully, it should remain undisturbed and preserved until you uncover it in 1955. Inside, you will fend repair instructions. My 1955 counterpart...' That's me. '...should have no problem repairing it so that you can drive it back to the future. Once you have returned to 1985, destroy the time machine.' Destroy it?"
Marty: "Yeah, well, it's a long story, Doc."
Doc: "'Do not, I repeat, do not attempt to come back here to get me. I am perfectly happy living in the fresh air and wide open spaces, and I fear that unnecessary time travel only risks further disruption of the space time continuum.'"