After a tough auction, things get worse when the shop's landlord wants to talk.

When a ruthless storeowner seems hell-bent on stopping Ton and Allen from scoring new items, they fight back. The guys uncover a rare antique airgun.

The story of one American GI and how he and his Harley motorbike became a legend.

Earth remains a mystery to the billions of people on it. How did it come to exist? And how long will humans call it 'home'.

A group of hikers trekking across the Italian Alps stumble upon abandoned military infrastructure. What purpose did these camouflaged buildings serve.

Satellite images could explain desert ruins rumoured to be an entrance to an underworld and a city-sized chunk of ice suddenly disappears in Antarctica.

Explore how the Axis Powers' ruthless, brutal occupation and exploitation of other countries contributed to their demise.

In 1943, Germany fell at Stalingrad, its first major defeat. In the Pacific, Japan lost momentum after the US won at Guadalcanal.

What is it about the number 12? It holds divine significance in numerous sacred traditions and it's found repeatedly in ancient architecture. But why.

According to the earliest Tibetan traditions, hidden in the Himalaya Mountains is Shambhala, a kingdom of the gods. Does this mystical realm truly exist.

In 1980, soldiers encounter a luminous craft and dancing red lights in Suffolk. Witnesses report a metallic UFO hovering over water and crashing in Nova Scotia in 1967.

Texan farm workers are confronted by a 200-foot long object in the sky in 1957. In 1979, a UFO releases spiked spheres that leave a man unconscious in Scotland.

A newly discovered town in Devon turns history on its head and there's a shocking find by the Thames - almost 100 baby skeletons.

Andy searches for dragons in Somerset, visits the grave of Arthur and Guinevere and tests the healing waters of a spring once used to wash the Holy Grail.

Earth remains a mystery to the billions of people on it. How did it come to exist? And how long will humans call it 'home'.

A group of hikers trekking across the Italian Alps stumble upon abandoned military infrastructure. What purpose did these camouflaged buildings serve.

Satellite images could explain desert ruins rumoured to be an entrance to an underworld and a city-sized chunk of ice suddenly disappears in Antarctica.

Explore how the Axis Powers' ruthless, brutal occupation and exploitation of other countries contributed to their demise.

In 1943, Germany fell at Stalingrad, its first major defeat. In the Pacific, Japan lost momentum after the US won at Guadalcanal.

Built in 537, this is a walk-through the stunning place of worship located in Istanbul, Turkey.

Galen of Pergamon makes a name for himself as a physician for gladiators. Meanwhile, a devastating plague sweeps through the city.

What is it about the number 12? It holds divine significance in numerous sacred traditions and it's found repeatedly in ancient architecture. But why.

According to the earliest Tibetan traditions, hidden in the Himalaya Mountains is Shambhala, a kingdom of the gods. Does this mystical realm truly exist.

In 1980, soldiers encounter a luminous craft and dancing red lights in Suffolk. Witnesses report a metallic UFO hovering over water and crashing in Nova Scotia in 1967.

Texan farm workers are confronted by a 200-foot long object in the sky in 1957. In 1979, a UFO releases spiked spheres that leave a man unconscious in Scotland.

A newly discovered town in Devon turns history on its head and there's a shocking find by the Thames - almost 100 baby skeletons.

Andy searches for dragons in Somerset, visits the grave of Arthur and Guinevere and tests the healing waters of a spring once used to wash the Holy Grail.

Ton and Allen need to raise money to fix their truck. They score a foosball table, Tommy Gun drums and a treasure trove of Twinkies. But is it enough.

The guys battle it out with a fierce former employee. When all hope seems lost, a set of monster truck tyres and a mystery box could help them score big.

We examine the robot that defused bombs both on foreign battlefields and British streets, and an astonishing Gulf War minelayer.

Venus: Earth's Evil Twin: Earth's neighbour has volcanoes, clouds of acid rain and a surface temperature hot enough to melt lead - so is Venus our evil twin.

A secret military base is discovered a few hundred miles from the North Pole, while a man-made stone formation is found 120-feet below Lake Huron.

A giant carving of a strange creature suddenly appears in the Australian Outback and mysterious bright green lights illuminate the seas around Thailand.

Victory in war doesn't just require sound military strategy, vital resources and equipment are also critical. Discover how the Axis powers failed in this regard.

In 1944, D-Day pierces the Atlantic Wall, as Operation Bagration crushes the Wehrmacht in the East. The fall of the Third Reich begins.

In the Mojave Desert, there is a structure built to bestow everlasting life, and according to the architect, its blueprint is from another world.

Accounts of creatures that can shapeshift from one form to another can be found throughout history. But are they real and do they have otherworldly origins.

A silent football-shaped object causes grave concern when it's spotted in Maine in 1975. In 1946, a UFO crashes and causes a deafening explosion as it crashes in northern Sweden.

In Brazil, three men escape a close encounter. In Canada, a thirteen-year-old boy is blinded temporally after investigating a bizarre object.

Dr Alice Roberts visits excavations in Orkney and York on the hunt for Viking relics. Finds include an amazing collection of silver and gold.

Andy explores Wiltshire's mysterious megaliths and barrows, visits a medieval meadery and encounters a religious pilgrimage at the site of a freshly made crop circle.

Venus: Earth's Evil Twin: Earth's neighbour has volcanoes, clouds of acid rain and a surface temperature hot enough to melt lead - so is Venus our evil twin.

A secret military base is discovered a few hundred miles from the North Pole, while a man-made stone formation is found 120-feet below Lake Huron.

A giant carving of a strange creature suddenly appears in the Australian Outback and mysterious bright green lights illuminate the seas around Thailand.

Victory in war doesn't just require sound military strategy, vital resources and equipment are also critical. Discover how the Axis powers failed in this regard.

In 1944, D-Day pierces the Atlantic Wall, as Operation Bagration crushes the Wehrmacht in the East. The fall of the Third Reich begins.

Overcoming overwhelming odds while fighting throughout the Mediterranean, Caesar's decisive actions were a success and made him the most powerful man in the world.

In the Mojave Desert, there is a structure built to bestow everlasting life, and according to the architect, its blueprint is from another world.

Accounts of creatures that can shapeshift from one form to another can be found throughout history. But are they real and do they have otherworldly origins.

A silent football-shaped object causes grave concern when it's spotted in Maine in 1975. In 1946, a UFO crashes and causes a deafening explosion as it crashes in northern Sweden.

In Brazil, three men escape a close encounter. In Canada, a thirteen-year-old boy is blinded temporally after investigating a bizarre object.

Dr Alice Roberts visits excavations in Orkney and York on the hunt for Viking relics. Finds include an amazing collection of silver and gold.

Andy explores Wiltshire's mysterious megaliths and barrows, visits a medieval meadery and encounters a religious pilgrimage at the site of a freshly made crop circle.

Ton and Allen face their toughest challenge yet when two old rivals join forces. The guys dig up an off-road motorcycle and a pair of net guns.

Allen heads to an auction with Elle, while Ton and Big Sis revamp the shop to help bring in more customers. Allen unearths a Ouija board.

Exploring the machines that hide in the shadows, capturing, transmitting and analysing vital combat information.

From massive asteroids and bursts of radiation, are we prepared for the calamity that may be coming our way.

A giant naval vessel is located on the bottom of the Norwegian Sea, while an ancient reptile-like creature is found in Canada.

Strange black holes appear near Egypt's ancient pyramids and a mysterious red swarm invades a beach in India.

In our final episode, we examine how each Axis Power had troubles on their own home front, leading to disaster in the final days of the war.

During WWII, soldiers from the British Empire, Belgium and France tried to evacuate from the town of Dunkirk during a arduous battle with German forces. This film explores the story.

The White House has consistently denied any knowledge of aliens, but is it in fact possible that extraterrestrials have been influencing presidents.

Do the reported discoveries of towering, human-like skeletons reveal that the world was once inhabited by giants.

An Australian banana farmer spots a saucer-shaped UFO rising out of a swamp in 1966. That same year in Victoria, a man veers off the road while distracted by lights in the sky.

A father and son see mysterious lights near their property and call the sheriff's office. A large craft covers a French town in an odd material.

Dr Alice Roberts discovers what Britain was like before the Romans as she examines fascinating finds from the Bronze and Iron Ages.

Andy receives military training at a Civil War re-enactment, before embarking on a ghostly hunt and meeting the man who captured leopard DNA from a sheep kill.

From massive asteroids and bursts of radiation, are we prepared for the calamity that may be coming our way.

A giant naval vessel is located on the bottom of the Norwegian Sea, while an ancient reptile-like creature is found in Canada.

Strange black holes appear near Egypt's ancient pyramids and a mysterious red swarm invades a beach in India.

In our final episode, we examine how each Axis Power had troubles on their own home front, leading to disaster in the final days of the war.

During WWII, soldiers from the British Empire, Belgium and France tried to evacuate from the town of Dunkirk during a arduous battle with German forces. This film explores the story.

Thieves tunnel into the vault of a Lloyds Bank branch in London. A radio enthusiast intercepts their chatter, leading to a game of cat and mouse.

After 27 months of planning, an elite crew of Italian thieves execute their ambitious and intricate plan to make off with more than $100 million.

The White House has consistently denied any knowledge of aliens, but is it in fact possible that extraterrestrials have been influencing presidents.

Do the reported discoveries of towering, human-like skeletons reveal that the world was once inhabited by giants.

An Australian banana farmer spots a saucer-shaped UFO rising out of a swamp in 1966. That same year in Victoria, a man veers off the road while distracted by lights in the sky.

A father and son see mysterious lights near their property and call the sheriff's office. A large craft covers a French town in an odd material.

Dr Alice Roberts discovers what Britain was like before the Romans as she examines fascinating finds from the Bronze and Iron Ages.

Andy receives military training at a Civil War re-enactment, before embarking on a ghostly hunt and meeting the man who captured leopard DNA from a sheep kill.

Ton and Allen hit the road for Nashville, where they rumble with a band of tough, high-bidding bikers. The guys discover a 37mm anti-tank gun.

Big Sis drops some bad news as the guys clash with Carolyn at an auction in Long Beach. Ton and Allen unearth a Native American tomahawk.

Machines that would have been used had a stand-off resulted in all-out nuclear war, from the smallest tactical nuke to an experimental flying jeep.

Could aliens have already landed on Earth? Experts visit the Texas cemetery believed to hold the body of a life form that crashed there in 1897.

Experts explore a Hindu scripture describing a huge flying creature that landed on Earth. Could this monster have been an alien craft from outer space.

Explore the men in charge whose rampant egos and misguided belief in their own abilities led to their country making fatal mistakes in the war.

Explore how the seeds of Japan's defeat in 1945 were sown a decade earlier with the occupation of Manchuria in China.

A look from the Russian perspective at the biggest tank battle of World War II that brought crisis to the German war machine.

In Northumbria, skeletons tell tales of violent death and tenderness, and people curate grave goods in an amazing community project.

Dr Alice Roberts pays tribute to the Bard, visiting Shakespeare's first theatre in London's Shoreditch and sifting through the poet's rubbish.

Andy explores an ancient cavern, takes a tour of Dartmoor's prison museum and uncovers the legend behind Arthur Conan Doyle's 'The Hound of the Baskervilles'.

Could aliens have already landed on Earth? Experts visit the Texas cemetery believed to hold the body of a life form that crashed there in 1897.

Experts explore a Hindu scripture describing a huge flying creature that landed on Earth. Could this monster have been an alien craft from outer space.

In 1944, 28 Greek socialists were shot in Syntagma Square and 100,000 had perished by the end of the Civil War. Was this the old order Winston Churchill had longed for.

Since the Syrian civil war broke out in 2011, 400,000 have been killed in the conflict. Who is to blame for this and the terrible conditions in which its people live.

A look at some of the most famous missions in modern history. Special operations require skilful people, but elite technology plays a part too.

Andy explores Wiltshire's mysterious megaliths and barrows, visits a medieval meadery and encounters a religious pilgrimage at the site of a freshly made crop circle.

Satellite images could explain desert ruins rumoured to be an entrance to an underworld and a city-sized chunk of ice suddenly disappears in Antarctica.

The Invasion Of Britain: It is 47 AD. Emperor Claudius is considered a village idiot and can only hang onto his throne by waging a spectacular conquest. He chooses Britannia.

Dacian Wars: As expansive military campaigns and raids by Dacian tribes begin to test the Roman Empire's finances, pressure builds on Emperor Domitian.

Could aliens have already landed on Earth? Experts visit the Texas cemetery believed to hold the body of a life form that crashed there in 1897.

Experts explore a Hindu scripture describing a huge flying creature that landed on Earth. Could this monster have been an alien craft from outer space.

As long as there has been espionage, sex and the promise of it have been powerful tools of persuasion and blackmail.

Thousands of UFO sightings and abductions are reported every year. This series examines these accounts and casts new light on historic cases.

In 1944, 28 Greek socialists were shot in Syntagma Square and 100,000 had perished by the end of the Civil War. Was this the old order Winston Churchill had longed for.

Since the Syrian civil war broke out in 2011, 400,000 have been killed in the conflict. Who is to blame for this and the terrible conditions in which its people live.

The glassblowers waltz into the world of dance as they are challenged to pinch, pluck and perfect molten glass into a sculpture that shows the body in movement.

It all comes down to this. As the two finalists go head to head in a final challenge gallery showing, only one can be named champion and pocket the $60,000 prize.

Experts explore evidence suggesting Mecca's Grand Mosque and Jerusalem's Temple Mount were the ancient meeting places of man and extraterrestrials.

Experts examine beliefs that a French church provides a gateway to another universe. Plus, could the Sphinx be built on a library left by aliens.

Explore how the Axis Powers' ruthless, brutal occupation and exploitation of other countries contributed to their demise.

Victory in war doesn't just require sound military strategy, vital resources and equipment are also critical. Discover how the Axis powers failed in this regard.

In our final episode, we examine how each Axis Power had troubles on their own home front, leading to disaster in the final days of the war.

A unique look from the Russian perspective at the Soviet operation to encircle and annihilate the occupying Germans in the Belorussian SSR.

A newly discovered town in Devon turns history on its head and there's a shocking find by the Thames - almost 100 baby skeletons.

Andy searches for dragons in Somerset, visits the grave of Arthur and Guinevere and tests the healing waters of a spring once used to wash the Holy Grail.

Experts explore evidence suggesting Mecca's Grand Mosque and Jerusalem's Temple Mount were the ancient meeting places of man and extraterrestrials.

Experts examine beliefs that a French church provides a gateway to another universe. Plus, could the Sphinx be built on a library left by aliens.

On the orders of Adolf Hitler, the Nazi invaders of Alderney utilised more than 5,000 slave labourers to build a series of protective fortifications.

The World War II killings carried out by the Nazis on Alderney represent the worst mass murder in British history - yet no one has been brought to justice.

Encryption is a key tool for keeping valuable information secret, but some ingenious minds have managed to crack impenetrable codes.

Andy receives military training at a Civil War re-enactment, before embarking on a ghostly hunt and meeting the man who captured leopard DNA from a sheep kill.

A giant carving of a strange creature suddenly appears in the Australian Outback and mysterious bright green lights illuminate the seas around Thailand.

France ships prisoners to Devil's Island located off French Guiana so they would vanish from the public eye.

Andersonville was the last place a Union soldier wanted to end up during the Civil War; it became the final resting place for over 12,000 men.

Pablo Escobar's Medellin Cartel become powerful cocaine traffickers. When they went to war with Colombia, the cartel test their limits.

The Sonny Barger Years: Hells Angels president transforms the club into an organised crime syndicate and creates a blueprint for outlaw biker clubs to follow.

Experts explore evidence suggesting Mecca's Grand Mosque and Jerusalem's Temple Mount were the ancient meeting places of man and extraterrestrials.

Experts examine beliefs that a French church provides a gateway to another universe. Plus, could the Sphinx be built on a library left by aliens.

Two friends investigating a haunted highway get more than they bargained for, while a desert road trip becomes a terrifying ordeal for a father and son.

Check out a mythical sculpture unearthed by an Indian tsunami, a 12th-century temple in quake-prone Mexico and a sunken ship in Utah's Great Salt Lake.

On the orders of Adolf Hitler, the Nazi invaders of Alderney utilised more than 5,000 slave labourers to build a series of protective fortifications.

The World War II killings carried out by the Nazis on Alderney represent the worst mass murder in British history - yet no one has been brought to justice.

The competitors look to mirrors for inspiration as they take a moment to reflect before creating pieces that represent how they see themselves.

In the tricky mystery box challenge, the competitors are tasked with creating different household items.

Search for the Next Frontier: What will humans find when reaching other planets? And just how dangerous might it be.

The search for missing mountaineer Janet Mae Johnson, from 1973, gains momentum with the discovery of her backpack and camera in 2020.

A bright pink lake could point to a strange, undiscovered new species. When a young boy disappears in a sand dune, satellite images help with the investigation.

The Seeds of Violence 1918-1922: In the wake of the First World War, Adolf Hitler identifies Benito Mussolini as his model and has one ultimate goal: to gain power in Germany.

Deceit and Delusion 1923-1928: Hitler appears to be eliminated after his failed putsch in 1923. Discover how the Nazi movement used democracy's tolerance in Germany to come back.

Throughout the world, ancient objects have been found that leave archaeologists at a loss. What do they reveal about the world we live in today.

The mysterious keyhole symbol exists in mystic texts, sacred architecture and artwork found around the globe. Is there more to it than meets the eye.

A policeman hears a loud roar and sees an oval-shaped UFO in New Mexico in 1964. In 1994, a postal worker in Frankfurt spots an aura of light and a luminous object in the sky.

Local authorities receive over 50 UFO reports in the Chicago area on Halloween night. Multiple sightings of a large flying craft in PA are known as the Buck's County Wave.

Alice Roberts learns more about mankind's Stone Age ancestors, and travels to Jersey to meet a team hoping to shed new light on the Neanderthals.

Andy makes a startling discovery at the site of the Rendlesham UFO incident, before sending psychic Simi to investigate one of Britain's most haunted inns.

Search for the Next Frontier: What will humans find when reaching other planets? And just how dangerous might it be.

The search for missing mountaineer Janet Mae Johnson, from 1973, gains momentum with the discovery of her backpack and camera in 2020.

A bright pink lake could point to a strange, undiscovered new species. When a young boy disappears in a sand dune, satellite images help with the investigation.

The Seeds of Violence 1918-1922: In the wake of the First World War, Adolf Hitler identifies Benito Mussolini as his model and has one ultimate goal: to gain power in Germany.

Deceit and Delusion 1923-1928: Hitler appears to be eliminated after his failed putsch in 1923. Discover how the Nazi movement used democracy's tolerance in Germany to come back.

The fate of Pharaoh Ramses III has been clouded by rumours of a family plot against him. Examining the tomb, uncovers evidence to support this.

In 2012, the remains of King Richard III were discovered, offering unprecedented insight into the last moments of England's controversial monarch.

Throughout the world, ancient objects have been found that leave archaeologists at a loss. What do they reveal about the world we live in today.

The mysterious keyhole symbol exists in mystic texts, sacred architecture and artwork found around the globe. Is there more to it than meets the eye.

A policeman hears a loud roar and sees an oval-shaped UFO in New Mexico in 1964. In 1994, a postal worker in Frankfurt spots an aura of light and a luminous object in the sky.

Local authorities receive over 50 UFO reports in the Chicago area on Halloween night. Multiple sightings of a large flying craft in PA are known as the Buck's County Wave.

Alice Roberts learns more about mankind's Stone Age ancestors, and travels to Jersey to meet a team hoping to shed new light on the Neanderthals.

Andy makes a startling discovery at the site of the Rendlesham UFO incident, before sending psychic Simi to investigate one of Britain's most haunted inns.

Ton and Allen get taken down by their fiercest opponent, CJ, but a twist of fate keeps the guys in the game. Their accountant has some shocking news.

On the brink of a major decision, Ton and Allen face-off with Carolyn at an auction in Covina. Also, The guys decide the fate of the shop.

The Vietnam War pitted technology against sheer determination, as the American forces used superior firepower, but were scuppered by North Vietnamese ingenuity.

Alien Moons: Earth's moon is one of hundreds in the solar system, each has its own mysterious world. Do alien moons offer a key to exploring outer space.

In Siberia, a 44,000-year-old wolf, perfectly preserved in permafrost, may hold secrets about Ice Age bacteria and ancient microbial life.

Investigators find a new clue about the missing Malaysia Airlines flight that disappeared in 2014, and an astronaut spots something strange in the Sahara Desert.

Democracy Without Democrats 1929-1933: A protest turns into a racist and anti-Jewish movement during the 1920s and the NSDAP use emotions to gain the loyalty of the people.

The Racial State 1933-1934: President Hindenburg suspends freedom of speech and Hitler comes to power in 1933. The first concentration camps for political opponents are set up.

Experts investigate startling evidence suggesting that the Ancient Maya conspired with aliens. Was this how they acquired their knowledge of astrology.

Experts scrutinise the Maya Calendar, which predicted the world would end in 2012. Could it have anticipated the arrival of an extraterrestrial god.

In 1980, an Australian rancher witnesses a hovering UFO that shoots out a black tube-like object. A French biologist is left stunned when he spots a saucer-shaped craft in 1982.

Four US Air Force reservists are pursued by odd lights. Constable Alan Godfrey loses consciousness when he investigates a strange disruption in West Yorkshire.

Alice Roberts and Matt Williams present more outstanding archaeology. In the east of Britain, sites include Must Farm, Colchester, Oakington, Lyminge and Silchester.

Andy tracks down the site of the original Stonehenge, meets a childhood witness of Wales' most famous UFO incident and takes part in a comedic hunt for the Welsh Wildman.

Alien Moons: Earth's moon is one of hundreds in the solar system, each has its own mysterious world. Do alien moons offer a key to exploring outer space.

In Siberia, a 44,000-year-old wolf, perfectly preserved in permafrost, may hold secrets about Ice Age bacteria and ancient microbial life.

Investigators find a new clue about the missing Malaysia Airlines flight that disappeared in 2014, and an astronaut spots something strange in the Sahara Desert.

Democracy Without Democrats 1929-1933: A protest turns into a racist and anti-Jewish movement during the 1920s and the NSDAP use emotions to gain the loyalty of the people.

The Racial State 1933-1934: President Hindenburg suspends freedom of speech and Hitler comes to power in 1933. The first concentration camps for political opponents are set up.

The Hermetic Order of the Golden Dawn: Examine the secret society that laid the groundwork for modern Wiccanism. Were their members really engaged with the paranormal.

History has produced a steady stream of 'influencers', from apostles to ad men and doctors to despots. They are proof of just how fluid and fragile the truth can be.

Experts investigate startling evidence suggesting that the Ancient Maya conspired with aliens. Was this how they acquired their knowledge of astrology.

Experts scrutinise the Maya Calendar, which predicted the world would end in 2012. Could it have anticipated the arrival of an extraterrestrial god.

In 1980, an Australian rancher witnesses a hovering UFO that shoots out a black tube-like object. A French biologist is left stunned when he spots a saucer-shaped craft in 1982.

Four US Air Force reservists are pursued by odd lights. Constable Alan Godfrey loses consciousness when he investigates a strange disruption in West Yorkshire.

Alice Roberts and Matt Williams present more outstanding archaeology. In the east of Britain, sites include Must Farm, Colchester, Oakington, Lyminge and Silchester.

Andy tracks down the site of the original Stonehenge, meets a childhood witness of Wales' most famous UFO incident and takes part in a comedic hunt for the Welsh Wildman.

With the pawn shop history, Ton and Allen start the next chapter of their careers with a bang. They uncover a Russian cosmonaut spacesuit. but is it real.

Ton and Allen go head-to-head with their former assistant, Carolyn, while Ton battles a bad back. The guys discover an automatic BB gun.

A look at the origins of the arms race, from the first use of nuclear weapons that ended WW2 through the duration of the Cold War.

The sun's been worshipped since time began. Could unlocking its mysteries be the difference between life and death.

Travel to the most remote, uninhabitable parts of Earth to reveal great mysteries that have been frozen in time.

An ominous shadow engulfs the Pacific Ocean and scientists have trouble explaining a strange lake that's shaped like a perfect circle.

Hidden In Plain Sight 1935-1938: In 1934, Hitler's government is firmly in the saddle. Most Germans support Hitler's anti-Jewish policy and the regime's terror soon escalates.

Up in Flames 1936-1940: At the end of 1939, the German Army invades Poland. Examine how Hitler succeeded in pushing through his rearmament and war plans relatively unhindered.

Experts investigate the 'greys' - mysterious beings with big heads and eyes found carved into rocks. Who are these strange figures and what inspired them.

Did Mother Nature cause the volcanoes, earthquakes and floods of ancient times? Or could aliens have been responsible? Experts investigate.

Teens on a Christian retreat spot an object land on a hill, emitting solid beams of light in 1972. In 1989, two Belgian police officers chase a triangular craft across fields.

A hitchhiker is terrified when lights appear to attack him. A sighting in France becomes one of the most investigated cases in UFO history.

Alice Roberts and Matt Williams visit the Dorset Country Museum, where they explore finds from archaeological digs across the west of Britain.

Andy heads to the home of palaeontology on the Jurassic Coast and braves the collapsing cliffs of Lyme Regis to bring back one of its many fossils.

The sun's been worshipped since time began. Could unlocking its mysteries be the difference between life and death.

Travel to the most remote, uninhabitable parts of Earth to reveal great mysteries that have been frozen in time.

An ominous shadow engulfs the Pacific Ocean and scientists have trouble explaining a strange lake that's shaped like a perfect circle.

Hidden In Plain Sight 1935-1938: In 1934, Hitler's government is firmly in the saddle. Most Germans support Hitler's anti-Jewish policy and the regime's terror soon escalates.

Up in Flames 1936-1940: At the end of 1939, the German Army invades Poland. Examine how Hitler succeeded in pushing through his rearmament and war plans relatively unhindered.

A look at the world's largest art museum, located in Paris, France and the home of the Mona Lisa.

Just one of Rome's emperors is willing to step out of the Imperial Box into the arena and his name is Commodus, a man with a reputation for making enemies.

Experts investigate the 'greys' - mysterious beings with big heads and eyes found carved into rocks. Who are these strange figures and what inspired them.

Did Mother Nature cause the volcanoes, earthquakes and floods of ancient times? Or could aliens have been responsible? Experts investigate.

Teens on a Christian retreat spot an object land on a hill, emitting solid beams of light in 1972. In 1989, two Belgian police officers chase a triangular craft across fields.

A hitchhiker is terrified when lights appear to attack him. A sighting in France becomes one of the most investigated cases in UFO history.

Alice Roberts and Matt Williams visit the Dorset Country Museum, where they explore finds from archaeological digs across the west of Britain.

Andy heads to the home of palaeontology on the Jurassic Coast and braves the collapsing cliffs of Lyme Regis to bring back one of its many fossils.

A last-minute auction in Norwalk proves challenging when Ton and Allen go toe-to-toe with a real life cowboy couple. They also uncover a 3D printer.

An auction in Whittier gets ugly when a buyer named Big Dave tries to take it all. After some tough losses, the guys win a state of the art food truck.

International experts demonstrate in experiments the most important ranged weapons in history, including the Roman spear, the English long bow and the minié ball.

The SS Normandie entered service in 1935 and remains the most powerful steam turbo-electric-propelled passenger ship ever built.

In the Swiss Alps, a Roman dagger discovery reveals a 2,000-year-old battlefield where the Suanetes tribe fell to the Roman Empire.

A dagger sealed in King Tut's tomb for over 3,000 years is made of a possibly extraterrestrial metal. A huge swastika is found in the desert near Roswell.

The Gates of Hell 1941-1942: In the shadow of the war, the Nazi regime gradually advances its "final solution to the Jewish problem", culminating in the Holocaust.

Genocide 1942-1944: Along with Treblinka and Majdanek, Sobibor was one of the camps used in Operation Reinhard, in which the Nazis murdered almost two million people.

Experts open up NASA and secret government files. Can they find proof of alien contact in the recent or ancient past.

Experts explore the similarities between huge pyramids across the world. Could extraterrestrials have influenced their construction and design.

In 1974, a Saskatchewan farmer reports seeing objects hovering in a field before they vanish into the ether. Connecticut citizens witness strange lights and a giant UFO in 1984.

In Nova Scotia, a former naval officer sees five bright lights in the skies and a cigar-shaped object behind them.

Alice Roberts and Matt Williams visit the Neolithic Orkney World Heritage Site, where they explore finds from archaeological digs across the north of Britain.

Andy travels to Scotland, visiting the heart-rending doggy suicide bridge and learning about a terrifying family of cannibals who used to prey upon weary travellers.

The SS Normandie entered service in 1935 and remains the most powerful steam turbo-electric-propelled passenger ship ever built.

In the Swiss Alps, a Roman dagger discovery reveals a 2,000-year-old battlefield where the Suanetes tribe fell to the Roman Empire.

Giorgio Tsoukalos takes a look back at the most compelling investigations of all, and events that he believes represent real encounters with extraterrestrial visitors.

The Gates of Hell 1941-1942: In the shadow of the war, the Nazi regime gradually advances its "final solution to the Jewish problem", culminating in the Holocaust.

Genocide 1942-1944: Along with Treblinka and Majdanek, Sobibor was one of the camps used in Operation Reinhard, in which the Nazis murdered almost two million people.

The enigmatic Egyptian Queen's untold story is one of a ruthless genius, doing anything necessary to cling to power in the face of an ever-expanding Roman Empire.

Experts explore the similarities between huge pyramids across the world. Could extraterrestrials have influenced their construction and design.

Experts open up NASA and secret government files. Can they find proof of alien contact in the recent or ancient past.

In 1974, a Saskatchewan farmer reports seeing objects hovering in a field before they vanish into the ether. Connecticut citizens witness strange lights and a giant UFO in 1984.

In Nova Scotia, a former naval officer sees five bright lights in the skies and a cigar-shaped object behind them.

Alice Roberts and Matt Williams visit the Neolithic Orkney World Heritage Site, where they explore finds from archaeological digs across the north of Britain.

Andy travels to Scotland, visiting the heart-rending doggy suicide bridge and learning about a terrifying family of cannibals who used to prey upon weary travellers.

With their beloved bread truck on life support, Ton and Allen head to an auction to help save her.

Ton and Allen uncover vintage bear traps and a bounty of street art. If the pieces belong to the artist, RISK, it could be their biggest score ever.

Experiments reveal the secret of weapons that became key to aerial warfare, from incendiary arrows to bomb attacks. What will the next advancement be.

Renowned for its sheer power, the awe-inspiring Queen Elizabeth is the Royal Navy's lead ship and largest ever constructed.

Mauro De Mauro's disappearance in Italy reveals remains in a Mount Etna cave, linked to mafia ties and a 1962 assassination.

A heavily armoured force takes over one of Syria's most ancient archaeological sites, prompting fears that its relics are being stolen.

Armageddon 1943-1945: The defeat at Stalingrad in 1943 was the turning point of the war and convinced the Nazi leadership to intensify their terror and propaganda campaigns.

The Reckoning 1945-1948: In 1945, WWII was over but the violence had not ended. The survivors want to blame the Germans. The reckoning with National Socialism is ambivalent.

Ancient astronaut theorists hunt for evidence linking Bigfoot to alien species from the distant past. Could the ape-like giant be an extraterrestrial.

Ancient astronaut experts believe the minds of Einstein and Galileo were superhuman. Could these historical geniuses have had extraterrestrial connections.

A couple spot a huge blimp-shaped craft hovering over Michigan's Lake Erie in 1988. In 1963, two sisters and their housekeeper report being knocked down by a UFO emitting flames.

Strange light patterns are seen in Texas. In France, a man's knee injury is suddenly healed after an odd encounter.

Alice Roberts and Matt Williams visit sites in the west of Britain, including one uncovering the rituals of Stonehenge.

Andy visits Britain's oldest shop, drinks coffee with a corpse and discovers a 19th-century time machine hidden in an urban cemetery.

Renowned for its sheer power, the awe-inspiring Queen Elizabeth is the Royal Navy's lead ship and largest ever constructed.

Mauro De Mauro's disappearance in Italy reveals remains in a Mount Etna cave, linked to mafia ties and a 1962 assassination.

A British woman in the 20th century stunned Egyptologists by accurately locating structures and artefacts. Perhaps she had an otherworldly agenda.

Armageddon 1943-1945: The defeat at Stalingrad in 1943 was the turning point of the war and convinced the Nazi leadership to intensify their terror and propaganda campaigns.

The Reckoning 1945-1948: In 1945, WWII was over but the violence had not ended. The survivors want to blame the Germans. The reckoning with National Socialism is ambivalent.

Two skilled thieves go after New York's Pierre Hotel. The team take over the hotel, getting into the lobby vault and hundreds of safe deposit boxes.

A clued-up mafia crew attempt an ambitious airline heist at JFK International Airport. Those involved disappeared and met their fate in the aftermath.