MonsterQuest

Do wild hogs in the United States grow to monstrous sizes? An investigation meets victims of vicious wild boar attacks, looks at the existing evidence and teams up with hog hunters, researchers and trackers to find out.

In the fall of 2007, residents of Bolivia, North Carolina, started losing pets and farm animals to an unknown creature. Is it the same mystery predator with a taste for blood that preyed on goats and dogs in Bolivia more than 50 years ago?

Visit one of the most haunted houses in America, the Lizzie Borden house, scene of the famous 19th century double murder.

Just miles from the industrial cities of Ohio, there's a bogeyman that has terrified local children for over a century. According to stories and sightings, the Grassman is similar to a Bigfoot, but builds strange nests and has been known to attack.

Head deep into the Venezuela wilderness where there have been sightings of anaconda, huge man-eating snakes, and the first time ever, an industrial acoustic sonar camera will be used to search for these terrifying monsters.

Recent archaeological evidence suggests that common rats once grew to massive sizes. Are these huge rodents making a comeback? Journey into the sewers with rat experts and meet witnesses who tell of cat-sized rats that have huge appetites.

Between 1979 and 1983, over 200 livestock were torn apart on the moors of England. No predator was ever found and the attacks continue to this day. Eyewitnesses allege a strange "black beast" is the culprit, but new video evidence could reveal the answer.

In 1995, a beast dubbed "El Chupacabra," spanish for "The Goatsucker," was first sighted and accused of killing and draining the blood of hundreds of farm animals in Puerto Rico.

Native American history is full of "Hairy Man" stories and cave art dating back over a thousand years. Did they know the truth behind the Bigfoot legend?

A vampire scare in 1700s New England lasted more than a century and turned families and communities upside down. Watch as the latest tech is used to analyze historic evidence of these New England vampires and discover if there was any basis for the panic.

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 to find out.

In 1976, several New York police officers reported seeing an animal that they couldn't identify, and sightings still continue. Follow our team as they work with local researchers and renowned wildlife experts in the search for 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 Newfoundland.

Take a journey to the remote Chinese province of Hubei to discover what locals have dubbed the "Wild-Man," and join an international team of experts in a search for answers.

Are big bears getting more assertive and aggressive? The team journeys from Alaska to New Jersey to learn about bear activity and if hybridization could produce another crop of giant bears.

Does a monster of gigantic proportions thrive one thousand feet under the ocean's surface in the Sea of Cortez? In 2006, an expedition team captured video evidence of what appears to be a giant squid, and now they return to the area to find more proof.

Join an expedition into the wilderness of South America on the hunt for a monster-sized predatory spider. In the forests of Venezuela, there have been reports of spiders big enough to hunt and eat small dogs.

One of the deadliest predators in the ocean, the Bull Shark, can tolerate fresh water. See how a team searches for deadly sharks in freshwater, uncovers a lethal attack from history and hunts the bayous of Louisiana for predators.

Travel to the Blue Mountains of Australia in search of the huge Megalania lizard that once stalked early man and watch as the team examines recent reports of attacks, and even killings, by the world's largest known lizards.

Attacks have been reported at a remote cabin in Northern Ontario and DNA analysis suggests that the creature is a non-human primate. Now, an expedition sets up camp and waits for the creature's imminent return.