In 1948, a group of miners finds a gallery full of emeralds in a salt mine in Switzerland, but they are attacked by giant black beetles and only one of them survives. In the present days, the explorer John Palmer is ready to take vacations in Greece with his family when he is contacted and invited by a stranger called Vincent to lead his team in an expedition into a mine in Switzerland. In return, Vincent offers a large amount to John and the cottage nearby a lake and the entrance of the mine for his family to spend the vacation. John accepts the offer, and while leading the group underground in the tunnels, he finds that their ambitious leader Marcel is a very dangerous man. When John meets giant black beetles in the cave, he orders the group to return but Marcel threatens the safety of his family, forcing John to lead the team to the deep location of the emerald mine.

Tia and Tony are two orphaned youngsters with extraordinary powers. Lucas Deranian poses as their uncle in order to get the kids into the clutches of Deranian's megalomanical boss, evil millionaire Aristotle Bolt, who wants to exploit them. Jason, a cynical widower, helps Tia and Tony "escape to witch mountain," while at the same time Tia and Tony help Jason escape the pain of the loss of his wife.

An intelligent android (Michael) constructed by a research team is taken outdoors and successfully passed off as human in a trial run. When the government hears of this, they order their own set of tests in Washington. When the project leader realizes the military want the android for a soldier, he can't accept it, and he and Michael go into hiding to avoid their clutches.

John Henry Irons designs weapons for the military. When his project to create weapons that harmlessly neutralize soldiers is sabotaged, he leaves in disgust. When he sees gangs are using his weapons on the street, he uses his brains and his Uncle Joe's junkyard know-how to fight back, becoming a real man of "steel."

Jack Caine (Dolph Lundgren) is a Houston vice cop who's forgotten the rule book. His self-appointed mission is to stop the drugs trade and the number one supplier Victor Manning. Whilst involved in an undercover operation to entrap Victor Manning, his partner gets killed, and a sinister newcomer enters the scene... Along with F.B.I. agent Lawrence Smith, the two investigate a spate of mysterious deaths; normal non-junkies dying of massive heroin overdoses and bearing the same horrific puncture marks on the forehead. This, coupled with Caine's own evidence, indicates an alien force is present on the streets of Houston, killing and gathering stocks of a rare drug found only in the brain... Caine is used to fighting the toughest of criminals, but up to now they've all been human...

A remake of "The Man in Half Moon Street" (1945) (qv.). Dr. Bonner plans to live forever through periodic gland transplants from younger, healthier human victims. Bonner looks about 40; he's really 104 years old. But people are starting to get suspicious, and he may not make 200.

An alien narrates the story of his dying planet, his and his people's visitations to Earth and Earth's self-made demise, while human astronauts in space are attempting to find an alternate planet for surviving humans to live on.

Bywater's native Seminole Indians believe the swamp will be bloodily revenged by its guardian spirit, a 'dark warrior', for its 'rape' by Frederic and son Jake Schist's oil-drilling, sold out by their own late chief Ted Sallis. The rig is illegally protested against by hot-head ecologists, who get blamed for vandalism on the site. New, outsider sheriff Kyle Williams suspects immediately local adolescent Billy James wasn't eaten during love-making there by a cayman but by a mysterious monster, which already made and soon makes new bloody victims in weird, inconsistent ways. Several people add to the danger.