Mary time travels to 1885, for the sole purpose of liberating Doc and making sure that the past, present and the future are in line, so that people can return to their original places. In the meantime, Doc is head over heels in love with a local woman, and he understands that he can’t hide from his issues of the past.
This is a good deal more likable than part two because the product plugs have been held back, and Zemeckis is clearly having fun alluding to his favorite westerns; there's also a certain sweetness and charm in the Lloyd-Steenburgen romance.
The simplicity of plot, and the wide expansiveness of its use of space, are a refreshing change from the convoluted, visually cramped and cluttered second part.
Back to the Future Part III continues to move the spirit of the series forward in new and exciting directions, and it reaches a satisfying conclusion to the overarching story.
avoids many of the previous sequel's narrative and logical pitfalls and reengages more successfully with the simple, direct pleasures that made the 1985 original such a hit
