Doc's distinctive hunched-over look developed when the filmmakers realized the extreme difference in height between Christopher Lloyd and Michael J. Fox; Fox is 5' 4½" while Lloyd is 6' 1". To compensate for the height difference, director Robert Zemeckis used specific blocking where the two often stood far apart at different camera depths. For close-ups, Lloyd would have to hunch over to appear in frame with Fox. The same approach was used in the sequels.
Back to the Future
Eighties teenager Marty McFly is accidentally sent back in time to 1955, inadvertently disrupting his parents' first meeting and attracting his mother's romantic interest. Marty must repair the damage to history by rekindling his parents' romance and - with the help of his eccentric inventor friend Doc Brown - return to 1985.
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