The Jersey Devil, a winged half-bird half-horse, haunts New Jersey. Its screams echo through the Pine Barrens, causing panic. MonsterQuest's expedition and detective investigations seek scientific evidence to unravel the truth behind this legend.

To mark 100 years since the end of the Great War, Suggs and Stephen excavate the site of a huge World War One transit camp at Morn Hill, outside Winchester.

US airline pilots are reporting near mid-air collisions with UFOs. Elizondo hears a never-before-told account from a major legacy airline pilot whose report of a glowing orange sphere while in the cockpit over Arizona is backed up by photo evidence.

Follow the work of scientists looking for alternative Earths as they scan and map the universe.

Relive the epic battle which saw Caesar's Roman forces use audacious tactics to overcome a Gallic army that outnumbered them five to one.

The Vieira brothers track promising leads on the Goshen Mystery Tunnel site and on a giant skeleton found in 1849.

Hunting for the Lost Dutchman is usually a one-man journey, but Wayne Tuttle is partnering with a team of experts to follow a newly-revealed clue that could finally solve the 500-year-old mystery of America's most famous buried treasure.

What compelled ancient man to move colossal stones to build remarkably similar stone monuments all around the world, from the jungles of Costa Rica to Englands countryside?

The Jersey Devil, a winged half-bird half-horse, haunts New Jersey. Its screams echo through the Pine Barrens, causing panic. MonsterQuest's expedition and detective investigations seek scientific evidence to unravel the truth behind this legend.

To mark 100 years since the end of the Great War, Suggs and Stephen excavate the site of a huge World War One transit camp at Morn Hill, outside Winchester.

US airline pilots are reporting near mid-air collisions with UFOs. Elizondo hears a never-before-told account from a major legacy airline pilot whose report of a glowing orange sphere while in the cockpit over Arizona is backed up by photo evidence.

Follow the work of scientists looking for alternative Earths as they scan and map the universe.

Relive the epic battle which saw Caesar's Roman forces use audacious tactics to overcome a Gallic army that outnumbered them five to one.

The Vieira brothers track promising leads on the Goshen Mystery Tunnel site and on a giant skeleton found in 1849.

Hunting for the Lost Dutchman is usually a one-man journey, but Wayne Tuttle is partnering with a team of experts to follow a newly-revealed clue that could finally solve the 500-year-old mystery of America's most famous buried treasure.

The gods worshipped by the Norse Vikings were fearsome and mysterious. Experts investigate whether these powerful Viking Gods could have been visitors from another planet.

In the 1930s, live alligators were discovered in New York City sewers, fueling legends. Despite eradication efforts, the stories endured. MonsterQuest investigates, searching for evidence to prove the existence and thriving of these monsters.

Stephen Taylor and Suggs are up to their knees in mud in Lincolnshire as they dig up the remains of a Bolton Paul Defiant plane, shot down during the Hull Blitz.

Lue Elizondo previously identified five observable characteristics of UFOs, dubbed the 'five observables'. But there is a so-called sixth observable Elizondo began to investigate - an invisible threat these craft may pose.

Discover how the sun has both helpful and harmful effects for life on Earth.

Host Eric Geller travels through the dark and damp recesses of Berlin's secret bunkers. Engineered by the Nazis during WWII, their dark past is revealed.

In the storage room of a Victorian museum in the heart of northern Britain lies the mummy of a Peruvian man. The team takes a journey back in time, discovering a secret preserved in the skin that challenges history as we know it.

A revolution in engineering is making today's technology as outdated as the horse and buggy. On this episode: Lightning LS-218, the world's fastest production motorcycle; and Hyperloop, a train faster than the speed of sound.

The gods worshipped by the Norse Vikings were fearsome and mysterious. Experts investigate whether these powerful Viking Gods could have been visitors from another planet.

In the 1930s, live alligators were discovered in New York City sewers, fueling legends. Despite eradication efforts, the stories endured. MonsterQuest investigates, searching for evidence to prove the existence and thriving of these monsters.

Stephen Taylor and Suggs are up to their knees in mud in Lincolnshire as they dig up the remains of a Bolton Paul Defiant plane, shot down during the Hull Blitz.

Lue Elizondo previously identified five observable characteristics of UFOs, dubbed the 'five observables'. But there is a so-called sixth observable Elizondo began to investigate - an invisible threat these craft may pose.

Discover how the sun has both helpful and harmful effects for life on Earth.

Host Eric Geller travels through the dark and damp recesses of Berlin's secret bunkers. Engineered by the Nazis during WWII, their dark past is revealed.

In the storage room of a Victorian museum in the heart of northern Britain lies the mummy of a Peruvian man. The team takes a journey back in time, discovering a secret preserved in the skin that challenges history as we know it.

A revolution in engineering is making today's technology as outdated as the horse and buggy. On this episode: Lightning LS-218, the world's fastest production motorcycle; and Hyperloop, a train faster than the speed of sound.

The gods worshipped by the Norse Vikings were fearsome and mysterious. Experts investigate whether these powerful Viking Gods could have been visitors from another planet.