Discover strange aquatic mammals populating a river in Columbia, a ship marooned in sand along Namibia's Skeleton Coast and a Boeing 727 in a pine forest.

Jeremy recruits his daughter to clean a '63 Imperial with three decades of dirt, decay and rodents. A soiled Camaro Super Sport is in need of an extensive makeover.

In Minnesota, a '65 Chevy Corvair that's been through a tornado gets a whirlwind makeover, while a rancid Dodge Ram goes from mouldy mess to majestic in Georgia.

Experts find evidence suggesting that ancient aliens saved humanity from great floods sent by the gods. Can we rely on extra-terrestrials to save us again.

Ancient Alien theorists explore world mythology as they investigate whether extraterrestrials could be responsible for our existence.

Shall We Go On: Germany builds its empire in Europe, aiming to crush Britain with the Luftwaffe while France is conquered and divided as Churchill rejects peace.

Wernher von Braun was vital to NASA's Apollo 11 mission to put a man on the Moon, but this 'American hero' had his Nazi past kept under wraps.

Explore classic and underrated aircraft, from WWII fighters to the Screaming Eagles F4, showcasing aviation's evolving history.

Experts find evidence suggesting that ancient aliens saved humanity from great floods sent by the gods. Can we rely on extra-terrestrials to save us again.

Ancient Alien theorists explore world mythology as they investigate whether extraterrestrials could be responsible for our existence.

An elite group of British paratroopers launch a midnight raid in order to capture Hitler's unusual radar equipment.

On June 10, 1942, Major Georges Bergé's team landed in Crete to destroy Luftwaffe planes at Heraklion airfield. They faced a tough mission.

Ten British commandos, led by Major Hasler, leave the submarine Junon to paddle to Bordeaux and sabotage German warships.

On September 15, 1942, 12 commandos from the Special Operations Executive arrived in Northern Norway by submarine on a nearly suicidal mission.

During Italy's reconquest, the Allies faced the Winter Line and called in the First Special Service Force, elite troops trained for brutal terrain warfare.

Investigate videos, photos and audio of UFOs and conspiracies, using experts to separate hoaxes from credible evidence.

Wernher von Braun was vital to NASA's Apollo 11 mission to put a man on the Moon, but this 'American hero' had his Nazi past kept under wraps.

Explore classic and underrated aircraft, from WWII fighters to the Screaming Eagles F4, showcasing aviation's evolving history.

Waco Burning. The Waco siege, a 51-day standoff involving the Branch Davidians 1993, left nearly 80 people dead. Re-examine the shootout and the role played by David Koresh.

Blades of Fury: From the destructive Viking axe to the sacred but deadly Samurai katana, razor-sharp blades wielded by fearsome warriors have spilled blood and forged empires.

Experts find evidence suggesting that ancient aliens saved humanity from great floods sent by the gods. Can we rely on extra-terrestrials to save us again.

Ancient Alien theorists explore world mythology as they investigate whether extraterrestrials could be responsible for our existence.

Every inexplicable flash or strange aircraft makes us believe we've spotted extraterrestrials - but what if they've been watching us all along.

Slaver Ship Secrets: Ross Kemp is shocked by what he discovers as he dives on the wreck of a steam-age ship in north Devon, and a potential early slaver ship in Plymouth.

Dr Alice Roberts explores a secret location in the Cotswolds, which gives up a very precious and fragile artefact.

Malta loses a natural treasure, an enormous fiery vortex is seen in California and a mysterious radioactive hotspot is found near Chernobyl.

A beat-up '68 Bronco requires a substantial makeover in North Carolina, while in Minnesota, a trashed Trans AM proves hard work when it gets back to the shop.

In Minnesota, a cigarette-infested Dodge Charger receives a smoking-hot makeover, while a foul-smelling Acura comes clean in Georgia.

Experts explore the disappearance of civilisations throughout time and across the globe. Could clues left in their wake point to an otherwordly explanation.

Experts investigate whether alien life forms are thriving in our seas, following Russian cosmonauts' discovery of living plankton in space.

Infamy: By June 1941, Hitler controlled most of Europe, but the USSR resisted invasion. Then Pearl Harbor changed everything.

As one of their most controversial scientists, Heisenberg was key in the Nazis' efforts to build an atomic bomb. How close was he to achieving his goal.

Explore classic and underrated aircraft, from WWII fighters to the Screaming Eagles F4, showcasing aviation's evolving history.

Experts explore the disappearance of civilisations throughout time and across the globe. Could clues left in their wake point to an otherwordly explanation.

Experts investigate whether alien life forms are thriving in our seas, following Russian cosmonauts' discovery of living plankton in space.

Alien Messages: Could some of our ancient texts and structures be home to secret messages left by alien ancestors? If so, what can we learn from them.

Aliens And The Lost Ark: Experts on the extraterrestrial investigate the possibility of the religious relic being an alien artefact.

Aliens And The Creation Of Man: Can unexplained advances in human evolution be attributed to alien architects? Alien theorists look at the evidence.

Beyond Nazca: Giorgio Tsoukalos draws on evidence from past series as he takes an in-depth look at the mystery of Southern Peru's Nasca Lines.

The Monoliths: Giorgio Tsoukalos takes a closer look at the evidence as he asks whether Earth's stone monoliths were built with extra terrestrial help.

Did a retired Army officer find anomalies in NASA solar photos? Could a giant shark hint at megalodons.

As one of their most controversial scientists, Heisenberg was key in the Nazis' efforts to build an atomic bomb. How close was he to achieving his goal.

Explore classic and underrated aircraft, from WWII fighters to the Screaming Eagles F4, showcasing aviation's evolving history.

When the SS Mont-Blanc and the SS Imo collided in 1917 in the harbour of Halifax, Canada, the subsequent explosion killed or injured almost 11,000 people.

The Last Emperor: The series ends with a look at the demise of the Roman Empire. Despite efforts from the last emperor, the Romans become outnumbered by foreign invaders.

Experts explore the disappearance of civilisations throughout time and across the globe. Could clues left in their wake point to an otherwordly explanation.

Experts investigate whether alien life forms are thriving in our seas, following Russian cosmonauts' discovery of living plankton in space.

California is home to numerous sightings of unidentified flying objects. The size of the state is a recipe for explained and unexplained sightings.

Gun Runners: Hearing about his great-grandfather who served in the Merchant Navy inspires Ross to explore the wreck of a WWII cargo ship and try to recover its military supplies.

The archaeologists get more than they bargained for while exploring the childhood home of Lady Jane Grey.

Explore a long-forgotten network of Native American earthworks, a battlefield mystery in Belgium and a mysterious blood red lake on a Greek island.

In North Carolina, a forgotten Crestline goes from rat resort to regal ride. Then, Jeremy tries to properly clean a special edition Mustang.

In Minnesota, a 1957 Dodge Coronet taken over by raccoons needs some care to get it looking like the Batmobile.

Experts investigate ancient man's apparent obsession with building pyramids, and whether extra-terrestrials may have helped with their construction.

Crop circles are a global phenomenon, with 10,000 seen worldwide. But are these strange patterns simply a hoax or could they be proof of UFO activity.

A Dream of Great Success: After the attack on Pearl Harbor, the Japanese army celebrated its victory. Four months later, the Battle of the Coral Sea shakes their confidence.

Hans Kammler's fingerprints can be found all over the Third Reich's most prestigious and deadly engineering projects, including rockets and concentration camps.

The designer of one of the most popular car brands in history, Ferdinand Porsche would not have seen his success without the support of Adolf Hitler.

Experts investigate ancient man's apparent obsession with building pyramids, and whether extra-terrestrials may have helped with their construction.

Crop circles are a global phenomenon, with 10,000 seen worldwide. But are these strange patterns simply a hoax or could they be proof of UFO activity.

Images of Earth show cities glowing, while wilderness remains dark. Why is the Australian outback illuminated like a vast city.

Evidence of human activity is found in strange times and places and a new perspective on a biological activity known since the nineteenth century.

Discover five new discoveries that are probably related to potential warfare and one possibly to wildlife.

Discover major natural anomalies and varied human activities never investigated before.

Investigate two examples of human activity in the US., one in Africa and one in Asia, with two natural phenomena where ice is a major factor.

Is a picture taken in the 1890s the first Bigfoot photo ever.

Hans Kammler's fingerprints can be found all over the Third Reich's most prestigious and deadly engineering projects, including rockets and concentration camps.

The designer of one of the most popular car brands in history, Ferdinand Porsche would not have seen his success without the support of Adolf Hitler.

Hitler held many secrets he went through great lengths to hide throughout his life. This episode reveals the truth about his drug addiction and genital deformity.

Meet the women who took Hitler under their wing, training him in the methods of high society and power - only to be left behind once he achieved it.

Experts investigate ancient man's apparent obsession with building pyramids, and whether extra-terrestrials may have helped with their construction.

Crop circles are a global phenomenon, with 10,000 seen worldwide. But are these strange patterns simply a hoax or could they be proof of UFO activity.

A team of experts investigate some of the most well-known UFO cases of the last 75 years, hoping to uncover the truth.

The sinking of RMS Titanic was one of the 20th century's greatest tragedies - but was it also a crime? This film takes a fresh look at the case and examines recently discovered evidence.

Dig into how a lobster helped archaeologists discover an 8000-year-old underwater settlement.

Discover an underwater find from a violent past, a mysterious concrete 'ghost island' and never-before-seen tracks along the seabed.

An almost 100-year-old Model A filled with crickets needs a major overhaul. In Georgia, Knoxy and Wu disinfect a horrendous Honda HR-V covered in animal faeces.

In North Carolina, Jamie hopes to put a Honda CRX that's literally in pieces back together. In Georgia, Knoxy tries to flip a repulsive Ford Ranger.

Ancient alien theorists investigate evidence suggesting that extraterrestrials have played a pivotal role in the progress of mankind.

Experts investigate whether the US military has a secret space programme, as well as evidence suggesting alien races have been in conflict for millennia.

I Shall Never Look Back: At the beginning of 1942, war wages on the battlefields in Eastern Europe, North Africa and Asia Pacific.

Fritz Todt was the man tasked with engineering projects including the autobahn, the West Wall defences and more. But in 1942, he died under mysterious circumstances.

In 1923, Adolf Hitler led the infamous Beer Hall Putsch, an attempt to take power in Germany by force. It was a day that would change the world forever, birthing Hitler's regime.

Ancient alien theorists investigate evidence suggesting that extraterrestrials have played a pivotal role in the progress of mankind.

Experts investigate whether the US military has a secret space programme, as well as evidence suggesting alien races have been in conflict for millennia.

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.

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.

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.

Did a Las Vegas family have a close encounter with ten-foot-tall aliens in their backyard.

Fritz Todt was the man tasked with engineering projects including the autobahn, the West Wall defences and more. But in 1942, he died under mysterious circumstances.

In 1923, Adolf Hitler led the infamous Beer Hall Putsch, an attempt to take power in Germany by force. It was a day that would change the world forever, birthing Hitler's regime.

Explore some of the most valuable treasures found in the most unlikely of ways.

Relics from the crucifixion of Jesus Christ have fascinated the faithful for 2,000 years.

Ancient alien theorists investigate evidence suggesting that extraterrestrials have played a pivotal role in the progress of mankind.

Experts investigate whether the US military has a secret space programme, as well as evidence suggesting alien races have been in conflict for millennia.

A team of experts investigate some of the most well-known UFO cases of the last 75 years, hoping to uncover the truth.

Ben Fogle steps aboard the iconic tea clipper on her 140th anniversary to examine the full story of the world-famous ship and the desperate attempts to save her from the scrap yard.

The team hunt for artefacts from World War II.

Reveal the truth behind ancient legends. Tour an island covered in polar bears, see bizarre twin craters and examine an ocean formation similar to Atlantis.

After kick-starting their Alberta picking expedition at the legendary Blackfoot Truck Stop, Scott goes nuts for a 'white man's' totem pole.

Count down the world's top 10 mysterious islands, including sites said to be home to giants and islands that disappear into thin air.

Count down the top ten alien craft, from V-shaped objects to orbs of light to flying saucers.

Explore classic and underrated aircraft, from WWII fighters to the Screaming Eagles F4, showcasing aviation's evolving history.

Explore classic and underrated aircraft, from WWII fighters to the Screaming Eagles F4, showcasing aviation's evolving history.

Dig into how a lobster helped archaeologists discover an 8000-year-old underwater settlement.

Alice Roberts follows archaeologists as they excavate Iron Age Britain's most spectacular grave - a Yorkshire chariot burial.

The U-Boat Terror: Inspired by the story of his two cousins that died at sea in WWII, Ross Kemp heads up to Scapa Flow where he finds treasure that could link back to his family.

The Kaiser Sunken Fleet: Ross Kemp continues his adventure in Scapa Flow, plunging down on the wrecks of a German warship and an experimental submarine aircraft called the M2.

Count down the world's top 10 mysterious islands, including sites said to be home to giants and islands that disappear into thin air.

Count down the top ten alien craft, from V-shaped objects to orbs of light to flying saucers.

We examine how the battleship began the 20th century as a dominant force, but then saw its weaknesses exploited mercilessly in the World Wars.

Series exploring the role of trains in the major conflicts of the past 150 years. Auschwitz survivors explore the railways' part in the Nazis' mass murder.

Rise of the Machines: Examining moments of engineering ingenuity which made the difference between triumph and disaster on the battlefield - beginning with World War I.

In 1066, William of Normandy decided to go to England to claim the crown of England - which ignited a war of succession on an exceptional scale.

In 490 BC, Persian King Darius the Great sent an expeditionary force to Greece - but the Greeks awaited them there, repelling the invaders in a single battle.

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.

Count down the world's top 10 mysterious islands, including sites said to be home to giants and islands that disappear into thin air.

Count down the top ten alien craft, from V-shaped objects to orbs of light to flying saucers.

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.

We examine how the battleship began the 20th century as a dominant force, but then saw its weaknesses exploited mercilessly in the World Wars.

Investigate an intriguing 3,500-year-old box, a steam-powered gun and a monument that may have been an Aztec throne.

Considered one of the New Seven Wonders of the World, the Mayan City of Chichen Itza was the capital of a powerful civilisation.

Count down the top ten alien petroglyphs around the world, from strange figures to flying craft and carvings of what appear to be astronauts.

In the 1900s, a modern-day prophet Edgar Cayce became a worldwide sensation. He claimed to receive visions of both the past and future.

Explore classic and underrated aircraft, from WWII fighters to the Screaming Eagles F4, showcasing aviation's evolving history.

The designer of one of the most popular car brands in history, Ferdinand Porsche would not have seen his success without the support of Adolf Hitler.

The team hunt for artefacts from World War II.

Dr Alice Roberts explores a secret location in the Cotswolds, which gives up a very precious and fragile artefact.

Slaver Ship Secrets: Ross Kemp is shocked by what he discovers as he dives on the wreck of a steam-age ship in north Devon, and a potential early slaver ship in Plymouth.

Gun Runners: Hearing about his great-grandfather who served in the Merchant Navy inspires Ross to explore the wreck of a WWII cargo ship and try to recover its military supplies.

Count down the top ten alien petroglyphs around the world, from strange figures to flying craft and carvings of what appear to be astronauts.

In the 1900s, a modern-day prophet Edgar Cayce became a worldwide sensation. He claimed to receive visions of both the past and future.

Archaeologists identify a site containing unknown structures. A lake full of jellyfish is studied and Argentinian researchers make a discovery.

Archaeologists find an ancient structure built on granite columns, puzzling stone spheres are found in Costa Rica and Mexican skeletal remains emerge.

The courageous story of a Jewish child who survived the Holocaust as the Nazi's youngest soldier, hiding his secret for years before finally discovering his true identity.

Fascinating new evidence reveals fresh clues about the whereabouts of King Solomon's mines - and the fabulous treasures said to be in them.

Desert War: The stories of the siege of Tobruk and the battle of El Alamein, the result of which saw the first serious defeat of the German army.

Hell in the Pacific: This episode remembers some of the thunderous naval battles which took place during the Pacific War.

Count down the top ten alien petroglyphs around the world, from strange figures to flying craft and carvings of what appear to be astronauts.

In the 1900s, a modern-day prophet Edgar Cayce became a worldwide sensation. He claimed to receive visions of both the past and future.

Fish remains found near an angry Sumatran volcano could suggest a new human migration route and a collapsed kingdom in Turkey gets discovered.

The team dig into artefacts from a Jamaican port sunk by a devastating earthquake. They take a peek at a Minoan landmark and inspect a treasure trove of English relics.

Scotland: Scotland has an area called the 'Falkirk Triangle', encompassing the village of Bonnybridge, which claims the highest concentration of UFO activity.

Every culture and religion on the planet believes that an evil one will usher in the end of days. But who is this Anti-Christ? And how can we hope to stop him.

We rely on machines for virtually every aspect of modern life. But is technology going too far, too fast? And will humans suffer the consequences.

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.

Specialists in the field of the extraterrestrial examine new evidence that suggests there was extraterrestrial intervention on Earth in the distant past.

Experts question whether the truth of our alien past could be buried in areas that, due to warfare or instability, are off-limits to exploration.

Rattenkrieg: From Burma to China and war-torn Europe, battles rage on as Japan pushes in Asia and Hitler renews his assault on the Soviet Union.

Darrell Miklos and his team embark on a mission to solve one of history's most intriguing mysteries - the disappearance of the Nazi's looted WWII treasure.

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.

Specialists in the field of the extraterrestrial examine new evidence that suggests there was extraterrestrial intervention on Earth in the distant past.

Experts question whether the truth of our alien past could be buried in areas that, due to warfare or instability, are off-limits to exploration.

Alice Roberts tours the East of England, seeking out the biggest archaeological digs of the year and witnessing the uncovering of a hugely significant Roman mosaic.

The south of England offers rich pickings, including the earliest money made in Britain and a massive haul of Roman treasure.

Discover the most incredible archaeology from the north of Britain, including Scotland's oldest railway and one of the best-preserved Norman castles.

Alice Roberts heads to the Midlands to take a look at the best archaeological finds from the heart of England.

Professor Alice Roberts heads to the West of England to showcase some of archelogy's greatest recent finds, including a new Roman town.

Did a UFO follow two researchers home from an investigation and how did a bear learn to act like a human.

Darrell Miklos and his team embark on a mission to solve one of history's most intriguing mysteries - the disappearance of the Nazi's looted WWII treasure.

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.

Archaeologists study skeletal remains, uncovering stories of medieval life and ancient diseases like an unusual form of Paget's disease.

Step foot on the roller-coaster ride that is cracking humanity's most complex and important code - the Human Genome. Season finale.

Specialists in the field of the extraterrestrial examine new evidence that suggests there was extraterrestrial intervention on Earth in the distant past.

Experts question whether the truth of our alien past could be buried in areas that, due to warfare or instability, are off-limits to exploration.

A team of experts investigate some of the most well-known UFO cases of the last 75 years, hoping to uncover the truth.

Hugh and the team attempt to uncover a Roman fort, connected to Hadrian's Wall, that's buried beneath the back gardens of Benwell in Newcastle.

Alice Roberts tours the East of England, seeking out the biggest archaeological digs of the year and witnessing the uncovering of a hugely significant Roman mosaic.

Walk among colossal wonders scattered across the Earth's surface, including an ancient reptile skeleton, a massive head carving and a giant South African footprint.

North of Calgary, the guys visit a prolific collector with plenty of outbuildings and a sprawling graveyard of historic cars that capture Scott's attention.

Ancient Astronaut theorists suggest that aliens may have colonised an ice-free Antarctica, before a global event plunged it into the Ice Age.

Examining otherworldly artefacts as physical evidence of extraterrestrial visits, including a strange metal sphere that defies the laws of physics.

The Shame of Returning Alive: As Soviet forces push back, Goebbels calls for total war amid the devastation of German cities from Allied bombers.

Treasure hunter Darrell Miklos' search for lost Nazi U-Boats takes an unexpected turn when a 98-year-old eyewitness gives him an incredible tip.

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

Ancient Astronaut theorists suggest that aliens may have colonised an ice-free Antarctica, before a global event plunged it into the Ice Age.

Examining otherworldly artefacts as physical evidence of extraterrestrial visits, including a strange metal sphere that defies the laws of physics.

Near the Czech border, a secret German site, "The Giant," tests The Bell, powered by Serum 525, turning all who touch it into rotting living zombies.

1942 and Hitler has the totally barking idea of using educated dogs to do a soldier's job. The Nazi leader wants to create fearsome canines to help him win the Second World War.

Russian designer Nikolay decided to engineer a solution to trench warfare with an armoured vehicle with wheels that could move over any terrain.

Discover the true story of a German Luftwaffe pilot in World War II who risked his own life to save the crew of an American B-17 bomber.

Nazi scientists conducted brutal experiments for an Aryan master race, while zoologists ran their own bizarre trials.

Did a couple in Colorado spot Bigfoot from the window of a moving train.

Treasure hunter Darrell Miklos' search for lost Nazi U-Boats takes an unexpected turn when a 98-year-old eyewitness gives him an incredible tip.

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

Leroy Schweitzer breaks away from the US and takes advantage of everyone that decides to follow him, resulting in a prolonged armed standoff in 1996.

Superweapons of Fear: From the world's largest trebuchet to Nazi super cannons, these are the deadly weapons that rain destruction and spread fear on the battlefield.

Ancient Astronaut theorists suggest that aliens may have colonised an ice-free Antarctica, before a global event plunged it into the Ice Age.

Examining otherworldly artefacts as physical evidence of extraterrestrial visits, including a strange metal sphere that defies the laws of physics.

A team of experts investigate some of the most well-known UFO cases of the last 75 years, hoping to uncover the truth.

Hugh and the team attempt to uncover a Viking burial ground hidden beneath Masham in North Yorkshire.

The south of England offers rich pickings, including the earliest money made in Britain and a massive haul of Roman treasure.

Walk along ancient pathways on Easter Island and discover designs carved into Asia's Eastern Steppe as you explore the planet's most puzzling structures.

The guys visit a garage sale devotee and then scour a sprawling outdoor antiques show where the prices are steep and one vendor is driving Scott nuts.

Through history, mankind has credited its existence to otherworldly beings. Could this be true? Can any proof be found in these early beliefs.

In the countryside of Wiltshire, England lies Rudloe Manor. A quaint manor house? Or epicentre of British UFO research since World War II.

Endless Numbers: A Soviet offensive pushes German forces 30km from the Polish border. On June 6, 1944, Operation Overlord is launched against Germany.

After finding artefacts at a sunken pier, Darrell and his team discover a possible component of a secret weapon used by the Nazis.

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

Through history, mankind has credited its existence to otherworldly beings. Could this be true? Can any proof be found in these early beliefs.

In the countryside of Wiltshire, England lies Rudloe Manor. A quaint manor house? Or epicentre of British UFO research since World War II.

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 search for proof of alien visitors in the ruins of lost civilisations. Could Mayan carvings reveal a city once ruled by otherworldly beings.

From gunpowder to missiles, were these lethal weapons the product of human innovation or created with help from another, otherworldly source.

Experts scrutinise prehistoric ruins, asking whether humans could have built these advanced structures alone. Might they have had alien help.

Ancient alien theorists explore the origins of mythical gods. Could these tales of superhuman beings be based on sightings of extraterrestrials.

Is famous footage of the Mississippi Bigfoot the real deal.

After finding artefacts at a sunken pier, Darrell and his team discover a possible component of a secret weapon used by the Nazis.

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

For decades, residents in Nova Scotia have reported munitions washing up on their shores - believed to have come from the wreck of the SS Clare Lilley.

Science reveals new insights into belief and superstition in the land of the Pharaohs, from finding the long-lost 'Land of Punt' to Tutankhamun.

Through history, mankind has credited its existence to otherworldly beings. Could this be true? Can any proof be found in these early beliefs.

In the countryside of Wiltshire, England lies Rudloe Manor. A quaint manor house? Or epicentre of British UFO research since World War II.

A team of experts investigate some of the most well-known UFO cases of the last 75 years, hoping to uncover the truth.

Hugh and the team unearth William the Conqueror's lost priory hidden beneath Lenton in Nottingham.

Discover the most incredible archaeology from the north of Britain, including Scotland's oldest railway and one of the best-preserved Norman castles.

Explore some of the most cavernous places on the planet, including a mysterious Siberian crater and Greenland's bizarre black holes.

In PEI, the guys hit a 70-mile garage sale set up clear across the island. While Sheldon eats fresh oysters, Scott searches for treasure.

Ancient Astronaut theorists examine the creation myth of "The Cosmic Egg", and look at why the concept is so pervasive throughout the world.

Why do many ancient architectural wonders bear similarities despite being built by different civilisations? Could aliens have designed them.

Part One: Hear about the personal rivalry between Winston Churchill and Adolf Hitler, exploring how their exploits in World War I shaped their future commands.

Darrell and the team attempt a risky strategy when weather prevents them from diving from the boat. Meanwhile, Garth makes a solo journey to a deserted island.

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.

Ancient Astronaut theorists examine the creation myth of "The Cosmic Egg", and look at why the concept is so pervasive throughout the world.

Why do many ancient architectural wonders bear similarities despite being built by different civilisations? Could aliens have designed them.

The face of Christ is discovered in a field in Hungary and a photo that claims to show who shot down a passenger jet in Ukraine.

We investigate one natural phenomenon, four shapes that resemble human origin and monitor one example of human origin and current destruction.

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.

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

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

Was a UFO tracking an American fighter plane? The team of experts examines the evidence to find the truth.

Darrell and the team attempt a risky strategy when weather prevents them from diving from the boat. Meanwhile, Garth makes a solo journey to a deserted island.

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.

The story of Hitler's dysfunctional home life. His parents were closely related, and in his adult years, he was rumoured to have engaged in incest himself.

Discover the many lovers of Adolf Hitler - uncovering the unfortunate demise of all who dared resist his love, affection and sexual appetite.