As the railroad builders advance unstoppably through the Arizona desert on their way to the sea, Jill arrives in the small town of Flagstone with the intention of starting a new life.
Sam Moran is a Honolulu charter-boat captain who leads fishing expeditions in the tropical paradise. When his daughter is found murdered at the party of a wealthy young playboy, he seeks the truth about the murder.
Humanity finds a mysterious object buried beneath the lunar surface and sets off to find its origins with the help of HAL 9000, the world's most advanced super computer.
Anthony Steffen, as a young gunman who works as a circus performer, witnesses the killing of some outlaws, carried out by their leader and is credited with the deed.
Two young boys, play hooky from school in order to explore an ultramodern world's fair. They take in the many marvelous scientific and industrial exhibits, obtain literature, eat food, and generally run amok.