Move over, Delorean. Only one car was futuristic enough to have traveled the streets of Back to the Future, Gattaca, and Battlestar Galactica, and that car was the Citroën DS, circa 1955.
First manufactured in France in 1955, Citroën continued to make the DS though the mid-70s. Those 20 years were plenty for film-makers, who started painting up the historic cars and dropping them on to every futuristic street they could come up with.
Among the earliest instances was Back to the Future II, which sharp-eyed commenter 4k45h3d0 spotted in a series of behind-the scenes Back to the Future stills, cleverly disguised as a taxi: