Humanity finds a mysterious, obviously artificial object buried beneath the Lunar surface and, with the intelligent computer H.A.L. 9000, sets off on a quest.
A down-on-his-luck inventor turns a broken-down Grand Prix car into a fancy vehicle for his children, and then they go off on a magical fantasy adventure to save their grandfather in a far-off land.
A mysterious stranger with a harmonica joins forces with a notorious desperado to protect a beautiful widow from a ruthless assassin working for the railroad.