The series explores strange and unknown creatures that have been allegedly spotted by witnesses in various parts of the country and the world.
S3 E1: Death Of Loch Ness
Inventor Robert Rines, who believes he saw the Loch Ness Monster surface in 1972, searches for evidence to prove his theory that the creature has died.
S3 E3: Swamp Stalker
A swamp beast immortalised in the film "The Legend of Boggy Creek" is said to stalk the residents of a small town in Arkansas.
S3 E4: Devils In New Jersey
What is the truth about the Jersey Devil, which has been described as a winged half-bird, half-horse creature with hooves, a reptilian tail and a scream that echoes through New Jersey's Pine Barrens?
S3 E5: Gators In The Sewers
An urban legend comes true during the 1930s when New York City workers find swarms of alligators living beneath the busy streets of the metropolis.
S3 E6: Snowbeast Slaughter
The team hunt for a legendary creature that preys on elk, and perhaps even people, in the Colorado Rockies.
S3 E7: Mega Jaws
Mega Jaws: Investigating sightings of a 60-foot shark that might be a giant new species or a prehistoric survivor in the waters off Mexico's Baja Peninsula.
S3 E8: Monster Close Encounters
The team investigates increasing reports of Bigfoot encounters from across the United States.
S3 E9: Lake Demons
Investigating the history of eyewitness accounts of a 50-foot monster known as Ogopogo sighted in Lake Okanagan in British Columbia, Canada.
S3 E10: Sea Monsters
An expedition investigates controversial evidence that might confirm a history of sea monster sightings off the coast of Florida.
S3 E11: Mysterious Ape Island
In the Pacific Northwest, an investigative team searches for evidence of Sasquatch on Vancouver Island, where Native Americans once told tales of an ape-like beast that would steal children away.
S3 E12: Gigantic Killer Fish 2
Expeditions search for the Goliath grouper off the coast of Florida and a monstrous fish with frightening teeth beneath the icy surface of lakes in Minnesota.
S3 E13: Isle Of The Lost Tiger
The Tasmanian tiger was thought to have become extinct 80 years ago, but eyewitness reports and scientific research might indicate that the creature is on the verge of making a comeback.
S3 E14: Killer Jellyfish
The most venomous creature of the sea is on the move and spreading across the oceans leaving a trail of poisoned victims. These monsters, known to kill within three minutes, have been part of the ecosystem for more than 500 million years.
S3 E15: Flying Monsters
Investigating reports from Papua New Guinea of a terrifying monster with a 20-foot wingspan known as the "Demon Flyer" that some people think might be a prehistoric pterosaur.
S3 E16: The Curse Of The Monkey Man
Investigating reports from India of encounters with a ferocious half-man, half-ape creature dubbed the monkey man.
S3 E17: Killer Crocs
Across the world, people are reporting increasingly frequent encounters with frighteningly large crocodiles.
S3 E18: The Last Dinosaur
Searching the jungles of Central Africa for an elusive monster said to resemble an enormous, long-necked and four-legged saurpod dinosaur believed to have gone extinct 65 million years ago.
S3 E19: Critical Evidence
Investigators try to compile and analyze evidence to prove that the elusive monster known as sasquatch exists, including videos, tracks, prints and maps of sightings.
S3 E20: The Real Cujo
A team searches for feral dogs to uncover where they live and determine how dangerous they are in the wake of reports of predatory packs of canines attacking people.
S3 E21: Terror From The Sky
MonsterQuest goes to Mexico to investigate the phenomena of Unidentified Flying Humanoids.
S3 E22: Killer Chimps In America
MonsterQuest looks into reports of chimpanzees on the loose in the United States.
S3 E23: Tigers In The Suburbs
MonsterQuest looks into claims that large cats are on the prowl in the forests of the United States.
S3 E24: The Real Moby Dick
MonsterQuest goes to the Azores in order to look for an albino sperm whale and investigate the theory that such an animal would be hostile.
S3 E25: Monsterquest Two Hour
MonsterQuest uses the latest high-tech equipment to take a scientific look at legendary creatures around the world, creatures eyewitnesses claim to see to this day.
S4 E1: Monster Sharks
Great white sharks are the ocean's deadliest killers and as they swim closer to our beaches, attacks against humans are on the rise. MonsterQuest leads an expedition to examine why these monsters are becoming more aggressive predators.
S4 E2: Hillbilly Beast
A search in Eastern Kentucky for an elusive creature that is said to make terrifying, wild screams. Investigators look at photographic evidence, and explore the deep woods in an attempt to find the source of these mysterious sounds.
S4 E3: Giant Pythons In America
A deadly, slithering menace is taking over Florida and may be heading north. Discover whether pythons could hybridize and adapt, enabling them to threaten every state in the US.
S3 E2: Cattle Killers
Mysterious cattle killings plague North American plains for decades. Cases involve mutilation, blood drainage, missing organs, and high radiation levels. MonsterQuest investigates with samples for scientific analysis, seeking answers to the enigma.
S4 E4: Giant Killer Bees
MonsterQuest looks into reports of Africanized Bees in the southern United States and examines the theory that the bees are adapting to colder weather in spreading further north.
S4 E5: Mothman
MonsterQuest goes to West Virginia to look into the Mothman examining both the original 1967 case and more recent sightings.
S4 E6: Piranha Invasion
MonsterQuest investigates whether a breeding population of Amazonian piranha can survive in the waters of North America.
S4 E7: Mothman
In 1967, a giant winged monster reportedly terrorised the skies over a small town in West Virginia. MonsterQuest uses nighttime surveillance, perception tests and forensic sketching to determine if the beast is myth or frightening reality.
S4 E8: Piranha Invasion
For centuries the Amazon has been home to the most ferocious fresh-water monsters known to man - piranhas. With these creatures appearing in US waters, the team investigates whether the carnivorous beasts could breed and devastate local waters.
S4 E9: Sierra Sasquatch
Ancient petroglyphs in the Sierra Nevada mountains depict footprints left by frightening packs of hairy man-like beasts. Now, MonsterQuest heads to the heart of California where witnesses are encountering aggressively territorial packs of Sasquatch.
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