Our homes are meant to be sanctuaries - places where nothing can harm us. But sometimes, that sense of safety is shattered by something sinister. From "The Grassman" in rural Ohio, to the Spotsville Monster in Kentucky, to the haunted house of Amityville fame, the "Fouke Monster" in Indiana and a young girl's bizarre time slip, these witnesses have their sense of security smashed by the unexplained.

These are the chilling accounts of people who claim they were hunted by mysterious cryptids. From a Dogman in Ohio, a group of Bigfoot in Washington state, a Skunk Ape in Florida and a mysterious Wendigo in Wisconsin.

These are the chilling cases of law enforcement officers facing monsters no training could ever prepare them for. From the terrifying "Beast of LBL" to a Bigfoot encounters in Oklahoma and Washington State.

Hotspots of unexplained activity exist across America - specific regions where encounters with unknown creatures and supernatural forces seem to repeat again and again. From the famed Skinwalker Ranch in Utah, to the monstrous Mothman in Point Pleasant, West Virginia, to the Texas Dogman Triangle, the Bigfoot that calls the Klammath mountains of California home, and the numerous possession accounts that haunt Pittsburgh.

These are terrifying encounters with cryptids and the paranormal that didn't happen by accident - they began with one grave mistake that turned curiosity into a nightmare.

Is the legend of the Kraken, a tentacled beast as large as a whale, based on myth or a real creature? Take an expedition to the Sea of Cortez, Mexico where fishermen regularly claim to encounter large schools of giant squid. Watch as squid expert Scott Cassel uses lures with built-in cameras in an attempt to video a Kraken-sized squid 1,000 feet below the ocean. What Cassel and his team discover will make history.

Does a giant prehistoric creature lurk in Lake Champlain? The locals nicknamed it Champ. Generations of eyewitnesses rumor to have seen the creature, a dinosaur-like animal, 15-25 feet long most resembling the extinct plesiosaur. Examine the mystery surrounding Lake Champlain as specially designed cameras search for the monster. Existing photographic evidence will also be put to the test.

These are the chilling encounters of people who trespassed into the domain of the unexplained - and paid the price.

From training grounds to war-torn battlefields, a growing number of soldiers report encounters not with enemy combatants - but with something beyond the known world.

A look at the 40-foot long prehistoric "SuperCroc" Sarcosuchus imperator an ancestor of today's crocodiles which can be up to 20 feet long, but witnesses are claiming modern crocodiles are getting much bigger. The show delves into Florida's swamps in search of record-sized crocs that could be returning to their prehistoric size.

Investigation into the adaptability of giant pythons in Florida as their habitat spreads into heavily populated areas such as Miami.

Investigating reports of huge, man-eating snakes 50 feet or more in length in Venezuela. Also pet pythons that escape, multiply and grow huge in the Florida Everglades.

For decades cameras have been capturing images of a flying, torpedo-like creature. So fast it cannot be seen with the naked eye. Some think it is a military weapon, others believe it may be a creature from another dimension. But just what is it? This MonsterQuest scientific journey will use super high speed photography, physics and even a wind tunnel experiment to shed light on a creature simply referred to as Rods.

In 2006, the NY times revealed a devilish plan by Soviet dictator Josef Stalin to create monsters by crossing humans with apes. But was it real? And how far did he get? This MonsterQuest scientific journey will travel to Russia to find out. We will also look at the many other efforts, both by man and Mother Nature, to combine the strength of apes with the intelligence of man. This is a real Frankenstein story& from head transplants in the U.S. to cases of ape on human attacks. Man and Apes are not as different as you might think.

The vast swamps of Louisiana and Florida hide many animals...including a beast locals call The Swamp Creature. At 7 ft tall, with red hair, and a rotten egg smell this beast has been nicknamed The Skunk Ape. For the first time, bloodhounds will be used to track the elusive creature. And sexual ape pheromone chips will be used to guide the bloodhounds to their prey.

Does Canada have its own Bigfoot? Owners of a fly-in fishing cabin report attacks by an unknown creature. Can DNA tests on blood and tissue from the alleged beast reveal its true identity? The test results will surprise you. The best evidence available will be examined, from pictures and video, to hair and bones. Scientists will be brought in to tell viewers what the evidence reveals. Discover the truth behind these beasts and take a scientific look at legendary creatures around the world.

Investigation into the reports of gigantic swine like the 800 lb "Hogzilla" shot in Georgia in 2004.

High in the rugged wilderness of Colorado's Rocky Mountains a large hairy creature is said to be preying on the elk and frightening residents. The stories date back centuries with the earliest settlers describing terrifying encounters with a large beast whose scream bellows across the hills. Even today ranchers and hikers report a monster they can't explain that may be attacking their horses

For over 250 years a frightening winged beast has been menacing the residents of New Jersey. The Jersey Devil is described as a winged half-bird half-horse, with hoofed feet, a reptilian tail and a penetrating scream that echoes through the forests of New Jersey's Pine Barrens. Wildlife experts claim that a misidentified but known animal may be responsible for the encounters, but recent witnesses who have seen the beast are scared for their lives, and say the scientific evidence will prove there is a monster.

In the marshy swamp land of Texarkana a legendary beast has hunted the residents of a small Arkansas town. Their story was immortalized in a well known movie, The Legend of Boggy Creek. The real events were a series of violent nocturnal attacks that left behind not only fear and panic but also remarkable tracks. But the evidence is not just confined to history. Scientific clues continue to this day and point to a malevolent monster that stalks the Deep South.

Investigation of the Chupacabra, or "goat sucker". A mysterious bipedal, blood-draining creature said to be responsible for a rash of unexplained animal killings in Puerto Rico and Texas.

Native Americans have long revered huge birds called Thunderbirds. There was a rash of giant bird sightings in Illinois, Texas and Alaska back in the 1970's. A giant bird with a 15-foot wingspan allegedly attacked a small child in Illinois. Could there really be a giant bird or is it mass hysteria? Take a scientific journey and follow the many eyewitnesses' accounts across the country and examine the most compelling evidence.

Bigfoot has been sighted in Washington State more than any other place on earth. Join an all-female expedition as they try to lure a Bigfoot within range of their cameras. The 1967 Patterson footage will be reexamined using digital microscopes that could reveal details that might prove if the beast is real or a hoax.

A MonsterQuest expedition will deploy researchers and the latest technology into the jungle, searching for evidence of a creature natives describe as half man, half ape.

This episode was a rebranding of a previous history channel program, it tells the story of Giganto.

Eyewitnesses in Wisconsin and Michigan report seeing a tall hairy man - beast some describe as a dogman...a centuries old legend based on myth, not a real animal. But what are they seeing? MonsterQuest will deploy professional hunters and trackers in an area with recent sightings, armed with a tranquilizer gun. And for the first time eyewitness accounts will be put to the test, using polygraphs and hypnosis&the results will astonish.

The Sea of Cortez holds a monster of gigantic proportions. Video evidence of what appeared to be a huge squid, 1000 feet under the ocean's surface, was captured in 2006 by a Monster Quest expedition team. The footage is less than 2 seconds long, and difficult to analyze, but some experts believed the squid was up to 100 feet long. Now, MonsterQuest returns to the area with improved technology to find proof of this legendary sea beast.

The show follows an expedition deep into the jungles of Cameroon in search of evidence of the Mokèlé Mbèmbé – a creature local villagers identify as a long-necked sauropod thought to have gone extinct over 65-million years ago.

An investigation into the increasing number of great white shark attacks, following a team of researchers who are trying to determine why sharks are becoming more aggressive.

An investigation into the foothills of North Western Kentucky to search for a Bigfoot-like creature that is said to make terrifying, wild screams. A tooth, photographic and audio evidence come to light, and investigators venture into the remote wilderness in an attempt to identify the source of these mysterious sounds.

More than 50 years ago, South American scientists attempted to cross-breed bees that would produce more honey than ever before possible. But instead, they created a monster. Today, these giant bees are on the loose, spreading northward and invading US cities. MonsterQuest examines how these killer bees attack with an unseen ferocity and discovers that the bees may be adapting to colder temperatures, making them an even greater threat.

Attacks by mountain lions make headlines across the U.S. But some people say they are seeing something else...large black cats. From Texas to Minnesota to West Virginia, MonsterQuest will follow the eyewitness accounts and physical evidence of these demon cats. Pictures and law enforcement encounters prove a big black cat is out there but what is it? While they resemble a mountain lion, there is no such thing as a black mountain lion. Bones from a carcass, eyewitnesses claim was a huge black cat, will be put to the DNA test.

Investigation into the 2007 Bolivia, North Carolina reports of strange attacks on livestock and pets by a creature that feeds on blood.

Investigation into sightings of Bigfoot-like creatures throughout the state of Ohio.

Fossils of giant rats have been discovered by archaeologists, but are they returning? Follow along as Monsterquest examines reports that these large creatures are inhabiting modern sewers and that some are man-eaters.

Between 1979 and 1983 over 200 livestock were torn apart on the moors of England. Despite the efforts of armed marines, no predator was ever found and the attacks continue to this day. Eyewitnesses allege that a strange "black beast" is the culprit, but new video evidence could have answers to the mystery.

Native American history is full of "Hairy Man" stories and cave art that date back over a thousand years. Did Native Americans know the truth behind the Bigfoot legend? An expedition along the Klamath River into reservation land will use state of the art technology to search for something locals don't doubt is real. With unprecedented access to Native American stories and recent sightings, MonsterQuest examines this creature that is both feared and revered.

Most people agree that vampires are fictional creatures, but throughout history and even today, there have been cases of people who thirst for blood. These "real vampires" believe that in order to survive, they must feed on the life-force of others. In this episode, we investigate these living vampires to find out if there is a physical reason behind their cravings. Can science separate the fact from the fiction surrounding these "creatures of the night"?

Throughout history there have been sightings of a massive octopus big enough to attack and sink boats. Could such a creature really exist? Our divers probe the depths of the North Pacific where the world's largest known species of octopus lives. Could these octopuses be a food source for a monster? The investigation will use various underwater camera systems, including a tiny camera small enough to probe inside octopus lairs. Deep waters, rough currents, freezing temperatures and the prospect of encountering a 20-ton boneless horror make this a dangerous expedition.

In 1976, in upstate New York, several police officers witnessed an animal that they can't explain. They describe it as a "large creature, 7 to 8 feet tall, walking like a gorilla hunched over, making a sound like a woman screaming." Over thirty years later sightings are continuing and these police officers have agreed to be put to the test. Meanwhile, MonsterQuest teams up with local researchers and renowned wildlife experts on the trail of the Monster of Whitehall

Join divers, biologists and forensic sketch artists as they team up to search for "Cressie", the mysterious creature allegedly lurking at the bottom of Lake Crescent in New Foundland. Native American legends date back centuries and refer to a "Pond Devil" and a "Swimming Demon". There have been recent sightings by witnesses who describe seeing a strange oversized eel. Discover what the evidence reveals as scientists use the latest hi-tech equipment to get to the bottom of Lake Crescent.

Take a journey to the Far East, to the remote Chinese province of Hubai to discover what locals have dubbed the "Wild-Man." Witnesses have reported seeing a creature that is covered in reddish-brown hair, walks on two legs and is anywhere from five to seven-feet tall. Chinese authorities have collected over one hundred samples of unidentified hairs from the alleged monster and claim that it is just a matter of time before they capture this "Wild-Man." Join an international team of experts in a search for answers.