A dangerous combination of radiation and insecticide causes the unfortunate Scott Carey to shrink, slowly but surely, until he is only a few inches tall. His home becomes a wilderness where he must survive everything from spiders living in the cellar to his beloved cat.
When the first manned flight to Venus returns to Earth, the rocket crash-lands in the Mediterranean near a small Italian fishing village. The locals manage to save one of the astronauts Colonel Calder, the mission commander. A young boy also recovers what turns out to be a specimen of an alien creature. Growing at a fantastic rate, it manages to escape and eventually threatens the city of Rome.
A party of archaeologists discovers the remnants of a five millennia-old mutant Sumerian civilization living beneath a glacier atop a mountain in Mesopatamia.
Air Force Colonel Kenneth Penmark and his wife, Christine, adore their daughter Rhoda, despite her secret tendency for selfishness. Christine keeps her knowledge of her daughter's darker side to herself, but when a schoolmate of Rhoda's dies mysteriously, her self-deception unravels.
The arrival in a small mountain town of a dissheveled stranger launches a series of murders committed by some sort of animal. As the town doctor and his daughter attempt to help the stranger, the sheriff investigates the murders; and they uncover a sinister experiment involving two rogue scientists, a car accident victim, his wife and children, and a serum that causes a man to turn into a ravaging werewolf.
Scientists surgically transform the Creature into an air-breather, but being able to live on land is not enough to make him comfortable with humans. Enraged, he turns his wrath on anyone who comes near as he desperately tries to return to the deep-water world where he truly belongs.
Large star-shaped aliens travel to earth in hopes of warning them about an oncoming catastrophe. To prevent panic about their appearance, one alien takes the form of a popular singer.
In a shadowy world stitched from nightmares, a young woman's harrowing journey in a seedy hotel unveils her traumatic past. Haunted by violence and stalked through desolate streets, her psyche unravels as she confronts an abusive husband and unsettling memories.
A rogue scientist near a small desert town arouses the suspicion of the town's doctor when his lab assistant is found dead from a case of acromegaly, which took only four days to develop. As the doctor investigates, aided by the scientist's new female assistant, they discover that something is devouring local cattle and humans in increasingly large quantities.
A giant octopus, whose feeding habits have been affected by radiation from H-Bomb tests, rises from the Mindanao Deep to terrorize the California Coast.
Dr. Eric Vornoff, with the help of his mute assistant Lobo, captures twelve men for a grisly experiment; His goal to turn them into supermen using atomic energy. Reporter Janet Lawton, fiancée of the local lieutenant, vows to investigate Vornoff's supposedly haunted house.
While stationed in Asia, six American G.I.'s witness the secret ritual of Lamians (worshipers of women who can change into serpents). When discovered by the cult, the High Lamian Priest vows that "the Cobra Goddess will avenge herself". Once back in the United States, a mysterious woman enters into their lives and accidents begin to happen. The shadow of a cobra is seen just before each death.
In a tributary of the Amazon, a monster – half-man, half-fish – is captured and placed in a reservoir in a Florida national park to be observed by scientists.
As a result of nuclear testing, gigantic, ferocious mutant ants appear in the American desert southwest, and a father-daughter team of entomologists join forces with the state police officer who first discovers their existence, an FBI agent and, eventually, the US Army to eradicate the menace, before it spreads across the continent — and the world.