Startling evidence suggests the US military has been under attack from aliens for 50 years. Could they be keeping such a huge secret from the public.

Could the ability to travel through time be real? Experts unseal new evidence suggesting this phenomenon of science fiction might not be as far-fetched as it seems.

In this round, the competitors are tasked with creating a special piece that reflects the hurdles they have overcome in their respective pasts.

In this round, the competitors are challenged with creating an intricately crafted accessory for a high fashion look.

Experts examine the megalithic complex of Gobekli Tepe, and ask if such an advanced structure could possibly have been built by humans alone.

Researchers claim hidden messages can be found within the works of Leonardo da Vinci that may reveal an extraterrestrial influence.

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

Japan expands in Asia and Africa's colonies become key battlegrounds for power and resources.

Experts reveal the highly encrypted phones that criminal gangs use to stay under the radar, and explain how the police are turning the phones against the crooks.

Experts examine the megalithic complex of Gobekli Tepe, and ask if such an advanced structure could possibly have been built by humans alone.

Researchers claim hidden messages can be found within the works of Leonardo da Vinci that may reveal an extraterrestrial influence.

Roberts uncovers East of England's top finds, including a Roman dodecahedron, Boudicca's fort and Waterloo's lost dead.

Discoveries in southern England reveal Britain's oldest shoe, a forgotten warrior king's shipyard and hidden World War II defences.

Digs in western Britain uncover a forgotten fortress and a shocking discovery hidden beneath a Roman mosaic.

An awe-inspiring year of archaeological digs with Dr Alice Roberts. Roman finds include an amazing coin hoard and a man buried on a pile of dead animals.

Humans are found to have lived in Britain earlier than thought when tools are unearthed in Norfolk, while some of our ancestors' customs are revealed at another dig.

What is this serpent-like creature caught on camera? And did the Nazis once colonise the South Pole.

Japan expands in Asia and Africa's colonies become key battlegrounds for power and resources.

In the absence of humanity, the world's most iconic cities are reclaimed by nature, as animals roam free and fire and flood centuries of construction.

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

A worker is trapped on a burning building's ledge and kayakers are swallowed by a whale.

Experts examine the megalithic complex of Gobekli Tepe, and ask if such an advanced structure could possibly have been built by humans alone.

Researchers claim hidden messages can be found within the works of Leonardo da Vinci that may reveal an extraterrestrial influence.

The team use high-tech sidescan sonar and deep sea magnetometers to search for evidence after learning of an encounter with an underwater phenomenon.

The team find evidence from one of Scotland's bloodiest eras as they wade through the waters of the River Garry in the stunning Scottish Highlands.

Roberts uncovers East of England's top finds, including a Roman dodecahedron, Boudicca's fort and Waterloo's lost dead.

A grim discovery in a Swedish lake reveals shocking ancient practices. Meanwhile, in the Canadian Arctic, the fossil of a previously unknown mammal is found.

On the hunt for classic old Canadian canoes, Scott and Sheldon find themselves up the creek without a paddle. Later, they're forced to haggle with a smart teen.

Following a 2017 public disclosure of secret government UFO investigations, are we any closer to proving there has been a UFO conspiracy.

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

In 1941, Hitler invaded the USSR. Operation Barbarossa stalls as winter hits and Soviet resistance, fuelled by propaganda, turns the tide.

Decoding a lost civilization reveals the monumental challenge undertaken by some of the academic world's most brilliant minds.

Following a 2017 public disclosure of secret government UFO investigations, are we any closer to proving there has been a UFO conspiracy.

Rise of the Bomber: The story of a deadly war that intertwines Germany, Poland, Japan, Italy and Spain, and the remorseless development of weapons and bombers.

War Without Boundaries: The story of a deadly war that intertwines Germany, Poland, Japan, Italy and Spain, and the remorseless development of weapons and bombers.

The Means to Victory: The story of a deadly war that intertwines Germany, Poland, Japan, Italy and Spain, and the remorseless development of weapons and bombers.

The World at War: The story of a deadly war that intertwines Germany, Poland, Japan, Italy and Spain, and the remorseless development of weapons and bombers.

By Night & By Day: The story of a deadly war that intertwines Germany, Poland, Japan, Italy and Spain, and the remorseless development of weapons and bombers.

Is a video leak more evidence that UFOs really exist? And does footage prove that Sasquatch is no myth.

In 1941, Hitler invaded the USSR. Operation Barbarossa stalls as winter hits and Soviet resistance, fuelled by propaganda, turns the tide.

Decoding a lost civilization reveals the monumental challenge undertaken by some of the academic world's most brilliant minds.

Discover unidentified objects witnessed by military pilots and a potential alien home in the darkness of space.

The cave's eerie acoustics have been associated with supernatural phenomena, earning it a reputation for connecting visitors to the spirit world.

Following a 2017 public disclosure of secret government UFO investigations, are we any closer to proving there has been a UFO conspiracy.

Has the US military derived various forms of technology, including stealth technology, from downed UFOs? The UFO Magazine team investigate.

Rick and Beau embark on an epic search through the River Ouse in Yorkshire, in a bid to find evidence of Viking life.

Discoveries in southern England reveal Britain's oldest shoe, a forgotten warrior king's shipyard and hidden World War II defences.

In a Danish bog, hundreds of mutilated ancient bones are found, while a mysterious deserted island belonging to Russia is explored.

The Pickers head to the Rock to load up on authentic Newfoundland collectibles. But before they can start the deal making, the guys have to become honorary Newfies.

In 2017, a strange, cigar-shaped object enters the solar system, causing some astronomers to suggest that it could be an extraterrestrial craft.

Theorists speculate about the existence of black holes on Earth, which may explain strange disappearances and other inexplicable phenomena.

Chart the development of the original form of combat - melee. Over time, short range instruments of battle have evolved, from the short sword to Exoskeletons.

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

Revealing the encrypted German telegram could save Britain in its darkest hour. Can a team of geniuses decode the message in time.

In 2017, a strange, cigar-shaped object enters the solar system, causing some astronomers to suggest that it could be an extraterrestrial craft.

Theorists speculate about the existence of black holes on Earth, which may explain strange disappearances and other inexplicable phenomena.

Experts scrutinise the paintings, journals and technical drawings of Leonardo Da Vinci. Could they hide evidence of extra-terrestrial beings.

Scientists explore the possibility that sightings of alien beings or UFOs may be evidence of time travellers from the future.

Theorists investigate a depiction of a stegosaurus found at Angkor Wat in Cambodia. Could it suggest that alien species killed off the dinosaurs.

No one knows who designed and built Bolivia's sophisticated temple complex. Could it have been aliens? Experts investigate.

Experts question ancient civilisations' fixation with the Orion constellation. Could this star group have been an entry point for aliens visiting Earth.

Are the famous glowing lights above Marfa, Texas a supernatural phenomenon? And what spirit possessed a goat to walk like a human.

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

Revealing the encrypted German telegram could save Britain in its darkest hour. Can a team of geniuses decode the message in time.

Explore the groundbreaking discoveries, inventions and inventors throughout history that have changed the way we live our lives.

With the help of modern science, uncover the secrets of health and wealth in Ancient Egypt from Queen Hatshepsut's death to a case of breast cancer.

In 2017, a strange, cigar-shaped object enters the solar system, causing some astronomers to suggest that it could be an extraterrestrial craft.

Theorists speculate about the existence of black holes on Earth, which may explain strange disappearances and other inexplicable phenomena.

For years, people have claimed to have had direct, personal contact with aliens. The team tracks down some of those who claim to have had such contact.

The River Hunters head to the River Lochy in search for evidence of the clashing Scottish clans embroiled in the 17th Century civil war.

Digs in western Britain uncover a forgotten fortress and a shocking discovery hidden beneath a Roman mosaic.

Archaeologists in Russia find several mass graves, a World War II plane sits on a Canadian mountain and cosmic rays in Antarctica have stump experts.

The Pickers make a friendly wager to crisscross Newfoundland in search of the greatest piece of kitsch. In the process, they get a great history lesson on the area.

Researchers study giant ancient drawings found etched into the desert floor, which may be a part of an ancient alien code.

Could Area 51's notoriety act as a cover up to much bigger, top-secret extraterrestrial experiments taking place at multiple locations.

Weapons designed for everyone hand a sizeable advantage. Experts explore three weapons that are easily used: the crossbow, a pike and the Kalashnikov.

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

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

Researchers study giant ancient drawings found etched into the desert floor, which may be a part of an ancient alien code.

Could Area 51's notoriety act as a cover up to much bigger, top-secret extraterrestrial experiments taking place at multiple locations.

When terrorists kidnap more than 200 schoolgirls in northern Nigeria, rescuers use satellites to track them down.

New evidence could lead to the discovery of an unknown ancient civilization in the Amazon rainforest and an unidentified submarine is spotted in a North Korean shipyard.

A giant chasm opens in Siberia, dubbed a gateway to the underworld. Meanwhile, an entire island mysteriously vanishes without a trace.

A bright green swirling spiral appears in the seas of the Persian Gulf and a massive complex suddenly appears in Myanmar.

Strange images from a remote and empty desert could explain the mysterious mummies found there and an apocalyptic sandstorm swallows the Middle East.

Is a dead mermaid really preserved in Japan? And are UFOs attracted to nuclear facilities.

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

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

In Nazi Germany, questions about witchcraft attracted SS leaders. Himmler, dedicated to an Aryan super race, established a team to research witchcraft.

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.

Researchers study giant ancient drawings found etched into the desert floor, which may be a part of an ancient alien code.

Could Area 51's notoriety act as a cover up to much bigger, top-secret extraterrestrial experiments taking place at multiple locations.

This episode chronicles several close encounters with alien abductees who have been held captive, probed, examined and had objects implanted in their bodies.

The River Hunters head to Canterbury, where they're granted special permission to undertake the first official search of this section of the River Stour.

In 1592, Elizabeth I visited Sudeley Castle where a spectacular garden was created. 500 hundred years later, a team of archaeologists hunt for this lost gem.

Human remains are discovered high in the Ecuadorian Andes, while a strange earthquake-like event is investigated in Canada.

The guys get creative when they visit an eccentric dealer who keeps most of his treasures rusting outside. Scott and Sheldon buy two mystery trunks sight unseen.

Oak Island treasure hunter Marty Lagina and Ancient Astronaut theorist Giorgio A. Tsoukalos explore the ancient ruins of Sardinia, Italy.

Seven stone giants stand guard over a Pacific island. But what are they protecting? And from whom.

Speed has become a decisive feature in war's evolution: from the chariot that brought greater mobility to small handguns like Samuel Colt's revolver.

Colditz Castle, The Great Escape and the bold Warburg Wire Job.

Rise of the Bomber: The story of a deadly war that intertwines Germany, Poland, Japan, Italy and Spain, and the remorseless development of weapons and bombers.

Oak Island treasure hunter Marty Lagina and Ancient Astronaut theorist Giorgio A. Tsoukalos explore the ancient ruins of Sardinia, Italy.

Seven stone giants stand guard over a Pacific island. But what are they protecting? And from whom.

Exploring the Cold War vessels that played pivotal roles in events such as the blockade of Cuba and the Vietnam war.

Stories of hospital ships and those who served on them, including the tragic story of the sinking of the Titanic's sister vessel, The Britannic.

Ships don't have to be large to make history, like the 1776 gunboat built to stop a British invasion, or the remarkable story of the HA-19 sub.

We learn about life on a Tudor ship from objects found on the Mary Rose, while on HMS Victory we learn the battle-winning tactics of Admiral Nelson.

A look at the tactics employed to pass strategically important ships under the nose of the enemy, and the use of intelligence to carry out naval attacks.

Strange creatures are encountered and a home security video may be proof that UFOs are messing with technology.

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.

Colditz Castle, The Great Escape and the bold Warburg Wire Job.

A deadly discovery hiding under one of America's most national parks, a Nazi era weapon sunk off the coast of New Jersey.

The history and perplexing mysteries behind some of the world's most sacred and holy relics.

Oak Island treasure hunter Marty Lagina and Ancient Astronaut theorist Giorgio A. Tsoukalos explore the ancient ruins of Sardinia, Italy.

Seven stone giants stand guard over a Pacific island. But what are they protecting? And from whom.

The team head to Mexico to the site of an alleged international incident involving the remains of a UFO wreck.

The River Hunters hit the oldest town in Britain, searching the town's historic waterway for evidence of the Siege of Colchester.

Silchester is one of the best preserved Roman sites in Britain. Why did Rome's infamous emperor Nero stamp his mark on the town.

In Russia, 34,000-year-old graves are discovered. Meanwhile, a team attempts to locate a British World War II aeroplane that went missing in Iceland.

On the lookout for Big Foot, the Pickers search Southern B.C. for treasures like vintage toys, a silver saddle and cedar canoes.

In 1980, a man received a code after touching an alleged spaceship. After the sequence was translated, he was told never to speak of the incident again.

Ancient alien theorists ask whether the Greeks and Egyptians understood electricity. Could extraterrestrials have introduced them to such technology.

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

The Japanese Super Code reveals the US efforts to crack Japan's unbreakable WWII code following the horror of the attack on Pearl Harbor.

With the Allies at crisis point, pressure mounts on the Wrens to prove their worth and the stage is set for a battle that will turn the tide of the Atlantic war.

Roberts uncovers East of England's top finds, including a Roman dodecahedron, Boudicca's fort and Waterloo's lost dead.

Discoveries in southern England reveal Britain's oldest shoe, a forgotten warrior king's shipyard and hidden World War II defences.

Digs in western Britain uncover a forgotten fortress and a shocking discovery hidden beneath a Roman mosaic.

In 1980, a man received a code after touching an alleged spaceship. After the sequence was translated, he was told never to speak of the incident again.

Ancient alien theorists ask whether the Greeks and Egyptians understood electricity. Could extraterrestrials have introduced them to such technology.

From tests in the River Thames, to the German's deadly U-boat attacks in World War II, this episode explores the silent threat of submarines.

The astonishing accounts of four railway journeys that changed history, including the perilous expedition that made a young Winston Churchill world famous.

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

A neglected warning inside a mighty conqueror's tomb heeds one of the deadliest invasions in human history.

The world's greatest showman, a rumoured valley of gold and a fortress of protection - their legends prove fame, wealth and even safety can come at a dire cost.

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

As we plan to travel to new worlds, how are we preparing to become human extraterrestrials? Will we survive into the unknown.

In 1980, a man received a code after touching an alleged spaceship. After the sequence was translated, he was told never to speak of the incident again.

Ancient alien theorists ask whether the Greeks and Egyptians understood electricity. Could extraterrestrials have introduced them to such technology.

A powerful earthquake in 2018 seemed to lead to an increase in UFO sightings in Alaska - but why? Do the extra terrestrials have something to protect here.

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.

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

Exploring the impact of the Battle of Towton during the War of the Roses, Karl and Kevin continue their look at how weapons and body armour developed.

Discover an array of mysterious phenomena seen from above, including a Nazi weapon in Northern France and a Russian military tower near Chernobyl.

Experts scrutinise the paintings, journals and technical drawings of Leonardo Da Vinci. Could they hide evidence of extra-terrestrial beings.

Scientists explore the possibility that sightings of alien beings or UFOs may be evidence of time travellers from the future.

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

Revealing the encrypted German telegram could save Britain in its darkest hour. Can a team of geniuses decode the message in time.

The battle hits a turning point and Donitz unleashes an advanced torpedo to flip the momentum. Roberts and Laidlaw must devise a strategy to combat the new threat.

In 1592, Elizabeth I visited Sudeley Castle where a spectacular garden was created. 500 hundred years later, a team of archaeologists hunt for this lost gem.

Silchester is one of the best preserved Roman sites in Britain. Why did Rome's infamous emperor Nero stamp his mark on the town.

Venture to England's South Coast, as we dive with sharks, explore the battlements of Drake's Island, uncover the origins of Scouts, and discover fossils on the Isle of Wight.

Experts scrutinise the paintings, journals and technical drawings of Leonardo Da Vinci. Could they hide evidence of extra-terrestrial beings.

Scientists explore the possibility that sightings of alien beings or UFOs may be evidence of time travellers from the future.

A volcanic island called Kolombagara, with a secret cave, rises out of the Pacific Ocean. In Vietnam, bones from an unknown animal are found.

A cave bursting with bones is found in the jungles of Mexico. In Hawaii, archaeologists find unusual sculptures with big heads and bulging eyes.

Follow a battle for survival in a terrible day of vicious WWII combat, when the USS Enterprise lost many of her crew and her sister ship, the USS Hornet.

Beneath a shopping arcade in Leeds' city centre, archaeologists discovered a Roman-era Christian cemetery containing the remains of 317 individuals.

With all the activity that's been recorded here, Sedona seemingly doubles as an intergalactic airport - but what is drawing UFOs to this spot.

Explore the stories of six formidable rulers, revealing their dark legacies and the impact they've had on history.

The murder in 1943 of Sir Harry Oakes in the Bahamas, where the Duke of Windsor was governor at the time and influenced the outcome of his murder trial.

Experts scrutinise the paintings, journals and technical drawings of Leonardo Da Vinci. Could they hide evidence of extra-terrestrial beings.

Scientists explore the possibility that sightings of alien beings or UFOs may be evidence of time travellers from the future.

Amazing CGI graphics tell the story of how the USS Enterprise and sister carriers Yorktown and Hornet turned the tide of the Pacific battle during WWII.

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.

Stephenville: In 2008, a shadow was cast over Stephenville, Texas, when a UFO passed overhead at supersonic speed. Craig and Sarah speak to an eyewitness and investigate.

Many believe Hitler and key members of his inner circle survived the fall of Berlin. If so, where did they go? And did they flee with plans for revenge.

Are governments secretly preparing for an alien attack? From death stars to satellites, experts explore the likelihood of an extra-terrestrial strike.

In this round, the competitors are put to the test as they are tasked with creating a sculpture that captures the heat, energy and emotion of fire.

In a pulsating season finale, the two remaining competitors must fill a gallery space with a show-stopping installation.

Have the US and Russia been working together from the beginning of the Space Race in preparation for the ultimate extraterrestrial encounter.

Ancient Astronaut theorists explore the idea that meteorites could be pieces of extraterrestrial technology.

New weapons with immense force define the wars of the 20th century as international experts test the catastrophic effects of destructive weaponry.

A daring dash through Nazi Europe, a deadly mountain escape and WWII's largest breakout, by men who chose death over dishonour.

War Without Boundaries: The story of a deadly war that intertwines Germany, Poland, Japan, Italy and Spain, and the remorseless development of weapons and bombers.

Have the US and Russia been working together from the beginning of the Space Race in preparation for the ultimate extraterrestrial encounter.

Ancient Astronaut theorists explore the idea that meteorites could be pieces of extraterrestrial technology.

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.

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

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

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

What happened to a Desert Storm pilot who went missing after being shot down in Iraq? Veterans Rudy Reyes and Ronnie Adkins break down the evidence.

Colditz Castle, The Great Escape and the bold Warburg Wire Job.

From Las Vegas to Dubai's Burj Khalifa, as sand, salt and sun dismantle cities, the wastelands quietly take back the ground borrowed.

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

A man seeking his 15 minutes of internet fame crashes his plane into a forest.

Have the US and Russia been working together from the beginning of the Space Race in preparation for the ultimate extraterrestrial encounter.

Ancient Astronaut theorists explore the idea that meteorites could be pieces of extraterrestrial technology.

The UFO Hunters travel to Stephenville, Texas to investigate multiple reports of strange lights in the sky.

The final hunt of the series takes the team back to Yorkshire to uncover relics from the brutal 14th Century clashes between the English and Scottish.

For more than 260 years, HMS Invincible lay at the bottom of the Solent. Now, archaeologists are diving beneath the waves to learn more about this game-changing ship.

A mysterious volcanic island off the coast of Antarctica is explored, while the mummified remains of a teenage girl are found in the Peruvian Andes.

The Pickers rush into Quebec's horse country, making a big offer on two of the finest antiques they've ever seen.

Ancient Astronaut theorist Giorgio A. Tsoukalos explores the latest evidence that suggests extraterrestrials visited Egypt in the distant past.

Military historian Stephen Bull tests the three most significant weapons of the sea and explores whether the subsonic torpedo could rule the waves in the future.

a German breakout, a US bomber crew's Soviet secret and the Trojan Horse of Stalag Luft III.

The Means to Victory: The story of a deadly war that intertwines Germany, Poland, Japan, Italy and Spain, and the remorseless development of weapons and bombers.

Ancient Astronaut theorist Giorgio A. Tsoukalos explores the latest evidence that suggests extraterrestrials visited Egypt in the distant past.

Terror of the World: The story of a deadly war that intertwines Germany, Poland, Japan, Italy and Spain, and the remorseless development of weapons and bombers.

Witness the extraordinary military success of the Blitzkrieg campaign, captured through rare combat footage and first-hand accounts in colour.

Through newly colourised footage, enter the heart of the War of the Mediterranean as the fate of North Africa was contested during the battle of El Alamein.

Hitler's plan for European domination led his new generation of tanks to the Soviet town of Kursk in July 1943. Witness extraordinary colourised footage of the battle.

Rewind to the US Army's largest and bloodiest conflict of World War II: The Battle of the Bulge. Venture through the battle in newly colourised footage.

Veterans Rudy Reyes and Ronnie Adkins break down the evidence behind the most mysterious photos, films and recordings in battlefield history.

A daring dash through Nazi Europe, a deadly mountain escape and WWII's largest breakout, by men who chose death over dishonour.

a German breakout, a US bomber crew's Soviet secret and the Trojan Horse of Stalag Luft III.

As we plan to travel to new worlds, how are we preparing to become human extraterrestrials? Will we survive into the unknown.

In the ancient Burnt City of Shahre Sukhteh, Iran, archaeologists uncover a remarkable discovery. The oldest known prosthetic eye, made of gold.

Ancient Astronaut theorist Giorgio A. Tsoukalos explores the latest evidence that suggests extraterrestrials visited Egypt in the distant past.

The team examines a declassified US Department of Defense report which analyses an alleged encounter between a fighter pilot and a UFO.

Rick and Beau return to tackle new rivers in a brand-new series. From Wales to Scotland, the pair investigate the cold and murky waters of historic sites.

Archaeologists conduct a dig at Auckland Castle in Co Durham, which 700 years ago was home to a group of power-crazed bishops.

Mysterious industrial waste is discovered in an uninhabited part of Greenland. Meanwhile, strange mounds are found deep within the Arctic Circle.

Scott and Sheldon arrive in Quebec and explore Canada's longest-running bar, pulling out nine tables from Henri "Pocket Rocket" Richard's tavern.

Are intelligent robots the next step in human evolution? As man and machine begin to merge, are we fulfilling a destiny prepared for us by aliens.

Experts explore how the ambush has revolutionised warfare with the benefit of undetected weapons, from the caltrop to the insidious land mine.

A Russian soldier's daring escape from a Nazi death camp, a bold plan from a Japanese prison and pilots winning their enemies' respect.

The World at War: The story of a deadly war that intertwines Germany, Poland, Japan, Italy and Spain, and the remorseless development of weapons and bombers.

Are intelligent robots the next step in human evolution? As man and machine begin to merge, are we fulfilling a destiny prepared for us by aliens.

Experts question the startling similarities in burial tombs from distant cultures, asking if aliens could have influenced their complicated designs.

Did prophets such as Elijah and Joseph Smith communicate with a heavenly source or did they actually come into contact with extraterrestrials.

Ancient alien theorists explore the mysterious phenomena of the Nazca Lines. Could these huge geoglyphs in Southern Peru have an extraterrestrial connection.

Experts scrutinise The Bible for evidence of alien abductions. Could extraterrestrials have been kidnapping humans for thousands of years.

A look at how ancient man could have built huge stone monoliths without advanced tools or technology. Could they have had extra-terrestrial help.

An American Korean War pilot is shot down and declared dead, but he could have been taken prisoner by the Soviets.

A Russian soldier's daring escape from a Nazi death camp, a bold plan from a Japanese prison and pilots winning their enemies' respect.

Discover the German submarines that caused havoc in the American desert, the playboy pilot they couldn't cage and the young lovers whose escape defied all odds.

Examine the influence that popular culture and entertainment have on daily life. As we gravitate to larger-than-life stories, outlandish myths begin to spread.

Scientists and historians join forces to investigate whether colossal volcanoes toppled an ancient dynasty and reveal the true face of an ancient mummy.