The slapstick adventures of hapless Gilligan, long-suffering Skipper and their gang of mismatched castaways, all stranded on an uncharted desert isle after their tiny ship hit stormy weather.

When virtually all of the residents of Piedmont, New Mexico are found dead after the return to Earth of a space satellite, the head of the US Air Force's Project Scoop declares an emergency. A group of eminent scientists led by Dr. Jeremy Stone scrambles to a secure laboratory and tries first to isolate the life form while determining why two people from Piedmont - an old alcoholic and a six-month-old baby - survived. The scientists methodically study the alien life form, unaware that it has already mutated and presents a far greater danger in the lab, which is equipped with a nuclear self-destruct device designed to prevent the escape of dangerous biological agents.

An ex-con seeks revenge on the man who put him in prison by planning a robbery of the latter's stagecoach, which is transporting gold. He enlists the help of a partner, who could be working for his nemesis.

A team of maritime salvage workers are about to embark on a recovery dive. However the 1883 Krakatoa Volcano eruption provides more pressing problems.

Young and awkward, The Coast-Guard's ensign Thomas Garland suffers from the comparison with his late father, a war hero. Which does not prevent him from falling for pretty Kate Fairchild, a young woman who runs a sailing school. Of course the way he expresses his deep sympathy for the lady leaves to be desired. And the situation does not improve when a trio of bumbling jewel thieves interferes.

The madam of a floating bordello hires private eye Peter Gunn to prove a gangster killed a crime boss.

A rookie cop on the undercover narcotic squad falls for the junkie who can help him nab a ruthless pusher/killer.

Two former comrades find themselves on opposite sides of the honesty fence. The real villains are corrupt government officials and big-business influence peddlers. Diplomacy goes out the window as arguments are settled with fist, foot, and crushed skulls.

What is meant to be a pleasure cruise becomes a nightmare as murder follows murder on a small ship. With tension mounting, passengers and the crew turn on each other in a desperate attempt to identify the killer.