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.

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

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

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

Investigation into the supposed existence of ghosts at the famous Lizzie Borden axe-murder house in Massachusetts.

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

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.

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.

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 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.

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.

Are big bears are getting more assertive and aggressive? In pre-historic times, giant bears weighed up to a ton and stalked early man. Listen as witnesses describe horrific bear attacks and take a look at unusual bear remains. The team journeys from Alaska to New Jersey to learn about bear activity and if hybridization or the next step in bear evolution could produce another crop of giant bears?

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.

Recently, American soldiers in Iraq were photographed with a 3 foot long arachnid. In Peru there is rumors of spiders large enough to attack and kill chickens. A MonsterQuest expedition is sent to South America in search of these creepy crawlers that so many fear.

The bull shark and greenland shark are examined. These sharks are believed to have swam upriver hundreds of miles.

A MonsterQuest expedition examines the Komodo Dragon, along with one of it's early ancestors, the Megalania Lizard.

Another attempt at finding proof of the Sasquatch. Previously collected blood samples are further investigated, while another expedition is sent out in search of the famous hairy beast.