Teenagers from a small town and their high school science teacher join forces to battle a giant mutant spider, living in a cave nearby and getting hungry.

Sam Butera and the Witnesses perform several Twist numbers to save a small New Orleans nightclub and raise the bail to get Louis Prima out of jail.

Airplane passengers prepare for a crash landing in the ocean.

Wayne, Jan, and Dino try pulling off a heist of a lumber company's payroll, and everything seems to go wrong right from the beginning, in spite of Dino's expertise. The trio take off for the woods in Canada with Wayne suffering from a wound and the law in hot pursuit. To complicate matters slightly there is a romantic tie-up with Jan, someone too tough and efficient to be easily won over.

A strange sphere settles down in a California canyon, causing both the scientific and military communities to gather around to investigate.

Glenn Manning, "The Amazing Colossal Man," believed dead after falling from the Hoover Dam, reemerges in rural Mexico, brain damaged, disfigured, and very angry.

Aliens, contacting scientist Adam Penner, inform him that they have been on the moon for twenty thousand years, undetected due to their invisibility, and have now decided to annihilate humanity unless all the nations of earth surrender immediately. Sequestered in an impregnable laboratory trying to find the aliens' weakness, Penner, his daughter, a no-nonsense army major and a squeamish scientist are attacked from outside by the aliens, who have occupied the bodies of the recently deceased.