Paleontologist Robert Trenton is called to Northeastern Antarctica near the Indian Ocean to help the FBI build an underground maximum-security military base and prison for the world's most dangerous criminals and terrorists, which is dubbed "New Alcatrax" by the staff. While building the prison, the staff accidentally awaken and unleash a prehistoric Boa Constrictor from its 200 year hibernation.
After an overly ambitious businessman transports an 80-foot python to the United States, the beast escapes and starts to leave behind a trail of human victims. An FBI agent and a snake specialist come up with a plot to combat the creature by pitting it against a bioengineered, 70-foot boa constrictor. It's two great snakes that snake great together!
The blood orchid - a rare flower that could hold the secret of eternal life and be worth a fortune to the company that finds it first. Led by a pharmaceutical research team, a scientific expedition sets out to go and explore deep into the jungles of Borneo to locate and bring back samples of the legendary plant. Battling through rainstorms to make their way upriver, the group encounters poisonous insects and a ferocious crocodile, only to discover they're being stalked by an even greater danger: a gathering of giant anacondas. Heat-sensing, fifty-foot-long flesh eaters that will go after anyone that crosses in their path.
Cancer-terminal tycoon Peter Murdoch's secret Wexel Hall Pharmaceuticals lab has developed a blood orchid extract cure. To examine why it works optimally in snakes, they also bread a super-anaconda strain. But the original pair escapes, leaving a bloody trail of human corpses. Murdoch runs, instructing his staff to clean up. They keep failing and being eaten like unsuspecting locals, some alive, even after enlisting ruthless big game hunter Hammett. The fast-growing pregnant monster sheds its skin, thus disabling the only tracking device they have.
When a man is eaten alive by an unknown creature, the local Game Warden teams up with a paleontologist from New York to find the beast. Add to the mix an eccentric philanthropist with a penchant for "Crocs", and here we go! This quiet, remote lake is suddenly the focus of an intense search for a crocodile with a taste for live animals...and people!
When a group of tourists stumble into the remote Australian river territory of an enormous crocodile, the deadly creature traps them on a tiny mud island with the tide quickly rising and darkness descending. As the hungry predator closes in, they must fight for survival against all odds.
Mutant snakes survived a terrorist attack on a government laboratory, and they now threaten the town of Santa Mira Springs, California. Seismic activity has brought snakes to the surface, where residents are being bitten. Victims can transmit the virus to healthy persons. The military puts the town under quarantine. Local physicians try to control the epidemic, while the military is primarily concerned with keeping the virus a secret.
Under a powerful Mayan curse, snakes are hatched inside a young woman, slowly devouring her from within. Her only chance for survival is a powerful shaman who lives across the border. With only hours to live, she jumps on a train headed for Los Angeles. Unfortunately for the passengers aboard, they are now trapped, soon to be victims of these flesh-eating vipers.
A group of American tourists heading down an African river make a brief stop at Snake Island, an island that has been virtually abandoned for years. When they end up getting trapped on the island overnight, they find thousands of deadly snakes intent on reclaiming the tropical island for themselves.
A set of vipers has been taken by scientists to mutate them to make a cure for cancer. As their experiment goes awry, the vipers escape into the woods - they're not only biting people, they're actually killing people, in a little town.