Experts investigate the 'greys' - mysterious beings with big heads and eyes found carved into rocks. Who are these strange figures and what inspired them? (S4, ep 3).

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. (S1, ep 4).

Film following the efforts to rescue one of the most important and influential seaplanes of WWII when it became stranded in the notorious waters of the Loch Ness.

A world-changing battle brews between a ruthless mogul and a little-known inventor. Can a farm-boy beat a titan with endless resources? (S1, ep 3).

Some 2600 years ago, the most sacred relic of the ancient world suddenly disappeared from history. Where did it go and why? (S14, ep 5).

Could insects have descended from extraterrestrials? Experts investigate whether Earth's 10 quintillion critters could have dangerous links to aliens. (S6, ep 10).

Suggs and Stephen go in search of relics from the United States' elite 82nd airborne infantry division. (S1, ep 4).

Tony takes in the wonderful seascapes of the North Norfolk coast, determined to uncover how it remained so unchanged through the Victorian age of industry. (S2, ep 6).

Mystery of the Missing Ship: Céline and Fabien follow top-secret clues as they hunt for a long-lost shipwreck in the Bermuda Triangle using cutting-edge technology. (3 of 3).

With Roman rulers now at the mercy of the barbarians, three Roman generals compete to become emperor - but one's savage strategy comes out on top. (S1, ep 12).

The team explore mystery cults and ancient catacombs to determine whether it's possible that the Ark of the Covenant was stolen and hidden in Rome. (S1, ep 1).

Mike struggles to pick just 10 cars from his collection, while Shafin convinces Avery to clean up his yard with the help of a monster truck. (S4, ep 8).

Though the Admiralty are convinced the Allies have the expertise to defeat Germany, Roberts and the Wrens start devising wargaming tactics to combat U-boat formations. (S1, ep 3).

When William Harley and Arthur Davidson have a bold vision for a new form of transportation, a revolutionary invention changes the industry forever. (S1, ep 4).

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. (S1, ep 9).

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. (S1, ep 10).

Craig Charles joins forces with world-renowned space journalist Sarah Cruddas to investigate some of the most perplexing UFO encounters of recent times. (S1, ep 2).

From the terrifying Tower of London to a hotel of horrors, discover the dark secrets hidden within these foreboding fortresses. (S1, ep 2).

Some 2600 years ago, the most sacred relic of the ancient world suddenly disappeared from history. Where did it go and why? (S14, ep 5).

Could insects have descended from extraterrestrials? Experts investigate whether Earth's 10 quintillion critters could have dangerous links to aliens. (S6, ep 10).

Mike struggles to pick just 10 cars from his collection, while Shafin convinces Avery to clean up his yard with the help of a monster truck. (S4, ep 8).

Green Beret Terry Schappert unearths the secrets of the Mayans, a fierce warrior society built on human sacrifice, bizarre rituals and deadly weapons.

With Roman rulers now at the mercy of the barbarians, three Roman generals compete to become emperor - but one's savage strategy comes out on top. (S1, ep 12).

Mystery of the Missing Ship: Céline and Fabien follow top-secret clues as they hunt for a long-lost shipwreck in the Bermuda Triangle using cutting-edge technology. (3 of 3).

Experts scrutinise prehistoric ruins, asking whether humans could have built these advanced structures alone. Might they have had alien help? (S3, ep 14).

Could claims of.

It was mankind's finest hour, the greatest technological achievement of the 20th century - the Apollo 11 mission to the Moon. (S9, ep 11).

Churchill must make crucial decisions and figure out how to navigate big changes as the war rages on and Britain makes a powerful ally. (3 of 4).

When a DC-10 aeroplane explodes mid-flight over Iowa, the quick-thinking pilot saves 184 passengers. But what caused such a huge disaster? (5 of 6).

The US military has denied that the 1947 Roswell crash was anything other than a weather balloon, but FBI files include a memo that indicate otherwise. (S9, ep 13).

Experts investigate startling evidence suggesting that the Ancient Maya conspired with aliens. Was this how they acquired their knowledge of astrology? (S4, ep 1).

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. (S1, ep 7).

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. (S1, ep 8).

Giorgio Tsoukalos takes a closer look at the evidence as he asks whether Earth's stone monoliths were built with extra terrestrial help. (S1, ep 2).

Vandalism strikes the Wildman shop, inspiring Avery to finish building his Manta Coyote car kit. Meanwhile, Mike plans an auction for his car collection. (S4, ep 4).

Forest fires threaten Rust Valley and after his neighbour loses 350 cars, Mike hoards fuel in a bid to save his own collection. (S4, ep 6).

from hidden worlds to unexplainable natural phenomena. (S4, ep 3).

from hidden worlds to unexplainable natural phenomena. (S4, ep 4).

Hours before the D-Day landing, a small group of American paratroopers were dropped behind enemy lines with a vital mission. (S1, ep 5).

Emperor Domitian tasks master builder Haterius with constructing a labyrinth underneath the Colosseum floor. (S1, ep 2).

From the terrifying Tower of London to a hotel of horrors, discover the dark secrets hidden within these foreboding fortresses. (S1, ep 2).

Thousands of UFO sightings and abductions are reported every year. This series examines these accounts and casts new light on historic cases. (S1, ep 5).

Did a Chilean family photograph a real UFO over the Andes? And does a huge fossil point to a prehistoric figure? (S4, ep 2).

Giorgio Tsoukalos takes a closer look at the evidence as he asks whether Earth's stone monoliths were built with extra terrestrial help. (S1, ep 2).

In 2017, a strange, cigar-shaped object enters the solar system, causing some astronomers to suggest that it could be an extraterrestrial craft. (S11, ep 3).

Theorists speculate about the existence of black holes on Earth, which may explain strange disappearances and other inexplicable phenomena. (S11, ep 4).

Explore the mystery that spawned a 75-year quest for an incomparable work of art worth half a billion dollars, lost without a trace. (S1, ep 3).

Theo Wilson time travels to Russia, 1986, where workers at the Chernobyl nuclear plant are in the throes of a disaster that threatens the lives of millions. (S1, ep 3).

Theo Wilson travels back in time to Salem, Massachusetts in 1692 where the village is self-destructing over allegations of witchcraft amongst its citizens. (S1, ep 4).

Researchers study giant ancient drawings found etched into the desert floor, which may be a part of an ancient alien code. (S11, ep 5).

Ancient alien theorists explore the origins of mythical gods. Could these tales of superhuman beings be based on sightings of extraterrestrials? (S3, ep 16).

Ancient Astronaut theorists suggest that China, with its history of technological advancement and isolationism, could have been the home of alien beings. (S9, ep 10).

Russia spans over six million square miles of some of the most rugged terrain on Earth, much of which is uninhabited and largely unexplored. (S9, ep 12).

Host Bobby Bognar explores what makes Italian food America's most popular type of ethnic cuisine.

Explore ancient inventions and engineering that were previously believed to have been created only in modern times.

In Montana's Glacier National Park, some claim that there is a hidden underground Nazi base that may even have been the final hideout for Hitler himself. (S1, ep 5).

From inexplicable disappearances to mysterious experiments, events in Mount Shasta National Park may be explained by an ancient Karuk Indian legend. (S1, ep 6).

On 6 March 1987, the ferry Herald of Free Enterprise capsized, resulting in the deaths of 193 passengers and crew. (S1, ep 2).

Emperor Domitian tasks master builder Haterius with constructing a labyrinth underneath the Colosseum floor. (S1, ep 2).

Medusa is the most infamous female fiend in Greek mythology - whose look turned every living thing to stone. But what is the true story behind the myth? (S1, ep 4).

As the clock ticks towards his auction, Mike races to restore as many cars as he can, while Avery struggles to finish the Manta in time at Wildman. (S4, ep 5).

New painter Neil takes a perfectionist approach to re-painting Connor's Chevelle Malibu, while Dubs Kustoms scores a new client with an impossible dream. (S4, ep 7).

Decoding Mayan texts, a physicist predicts a cataclysm will destroy the world. A NASA scientist makes an alien discovery. (S2, ep 4).

Three extraordinary stories about the supersensory power of animals, including a psychic octopus that correctly predicted multiple World Cup winners. (S3, ep 5).

Uncover the story of the SS Atlantic's deadly 1873 crash through intriguing stories and 3D recreations of the wreck. (S1, ep 1).

UFO witnesses have reported a variety of objects in Earth's skies for centuries - could they offer clues about more intelligent life in our galaxy? (S12, ep 32).

In Cyprus, a UN peacekeeper fights off deadly foe with the help of a mysterious power. Meanwhile, a strange presence is encountered at an Alaskan air force base. (S1, ep 3).

Magician and Houdini expert Bill Kalush secures access to Harry Houdini's diary previously kept from the public, and dissects it to learn more about his life.

Chile has the highest number of UFO sightings of anywhere on Earth. Now, incredible footage of a strange craft has people asking again about the reasons why. (S12, ep 26).

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. (S1, ep 9).

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. (S1, ep 10).

Could insects have descended from extraterrestrials? Experts investigate whether Earth's 10 quintillion critters could have dangerous links to aliens. (S6, ep 10).

As the Cold War ramps up, a body is found within miles of a nuclear testing site on a tranquil Australian beach. (S1, ep 4).

Explore the science and technology breakthroughs that have contributed to modern society, from the wheel's invention to the Incas' knowledge of the stars.

Some 2600 years ago, the most sacred relic of the ancient world suddenly disappeared from history. Where did it go and why? (S14, ep 5).

Thousands of people from every part of the world have reported being abducted by aliens, including even a world leader - President Kiran Ilyumzhinov. (S9, ep 15).

Did Mother Nature cause the volcanoes, earthquakes and floods of ancient times? Or could aliens have been responsible? Experts investigate. (S4, ep 4).

Treasure hunter Darrell Miklos and his team make a discovery far older than they expected, with new evidence later suggesting a significant find. (S1, ep 5).

The team explore mystery cults and ancient catacombs to determine whether it's possible that the Ark of the Covenant was stolen and hidden in Rome. (S1, ep 1).

When William Harley and Arthur Davidson have a bold vision for a new form of transportation, a revolutionary invention changes the industry forever. (S1, ep 4).

Explore the stories of the Star Ancestors - powerful beings embedded in the traditions of native people across North America that still exist. (S14, ep 6).

Theorists ask whether a currently unidentified species represented in our DNA could be a result of breeding between humans and aliens in the remote past. (S6, ep 11).

In WW2, Suffolk was home to 32 airfields that served as stations for US bombers. Suggs and Stephen hunt for relics of the visiting aircraft. (S1, ep 5).

Tony heads out on a walk that reveals the story of the remarkable Bronte family, exploring how the moors inspired their most famous novels. (S3, ep 1).

Alice tells the story of Roman Britain by studying the history of Chester. She enjoys an authentic Roman feast and checks out an archaeological discovery. (1 of 6).

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. (S1, ep 13).

A team of archaeologists embark on a quest to unearth the most treasured and famous artefact in human history, rumoured to be buried beneath Jerusalem. (S1, ep 2).

Mike builds a 1964 Parisienne for a big family, while Avery scores his first client of the year and puts together a 1975 Ford Bronco. (S4, ep 9).

Roberts and Laidlaw uncover a fatal flaw in the Royal Navy's anti-U-boat strategy and develop their own countertactic. Their next task is winning over the Admiralty. (S1, ep 4).

When Western Union offers a huge cash prize to anyone who can improve its network, two daring inventors go head-to-head and change human communication forever. (S1, ep 5).

With 3D recreations of the wreck, discover the story of the ship said to have sailed ablaze within the Northumberland Strait. (S1, ep 2).

James Nesbitt examines the Piper Alpha oil platform explosion of 1988, one of the most devastating man-made catastrophes to date. (S1, ep 3).

Adam and Caveman Rob get bitten by a lizard whose venom casts doubt - but not its ability to tear flesh - and another whose venom is brutally painful. (S2, ep 3).

Explore the stories of the Star Ancestors - powerful beings embedded in the traditions of native people across North America that still exist. (S14, ep 6).

Theorists ask whether a currently unidentified species represented in our DNA could be a result of breeding between humans and aliens in the remote past. (S6, ep 11).

Mike builds a 1964 Parisienne for a big family, while Avery scores his first client of the year and puts together a 1975 Ford Bronco. (S4, ep 9).

In 1415, an outnumbered English army defeated the French at Agincourt. Terry Schappert reveals what it took to be a warrior in one of history's most brutal battles.

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. (S1, ep 13).

Alice tells the story of Roman Britain by studying the history of Chester. She enjoys an authentic Roman feast and checks out an archaeological discovery. (1 of 6).

Of all the Hindu gods, none is more important than Shiva, the great destroyer. Could the deity have been the leader of an extraterrestrial race? (S9, ep 16).

Experts open up NASA and secret government files. Can they find proof of alien contact in the recent or ancient past? (S4, ep 5).

Racing an incoming hurricane, Darrell and his team are forced to make tough choices - but they finally locate the source of a massive magnetometer hit. (S1, ep 6).

A team of archaeologists embark on a quest to unearth the most treasured and famous artefact in human history, rumoured to be buried beneath Jerusalem. (S1, ep 2).

When Western Union offers a huge cash prize to anyone who can improve its network, two daring inventors go head-to-head and change human communication forever. (S1, ep 5).

Since 2017, the Navy has been releasing photos and videos of UFOs. Theorists suggest the images are nearly identical to accounts from centuries ago. (S14, ep 7).

Experts question whether ancient myths provide evidence that reptillian aliens are more than just pop-culture creations and staples of science-fiction. (S6, ep 12).

Suggs and WW2 expert Stephen uncover more historical finds across the UK, this time looking for relics of the 1944 D-Day operation. (S1, ep 6).

Tony sets out on a walk across the Cairngorms to Balmoral, in the footsteps of Victoria and Albert, who promoted the Scottish Highlands. (S3, ep 2).

Alice looks into the history of York, taking part in a Viking battle and examining an almost 1,000-year-old poo. (2 of 6).

An exploration of 3000 years of ancient Egyptian history through the amazing stories of 10 of its most famous and spectacular buildings. (S1, ep 1).

Analysis of biblical scripture leads the team to investigate sacred sites and ancient tombs as they retrace the possible journey of the lost artefact. (S1, ep 3).

A major setback during a restoration blows Mike's budget, while the biggest financial gamble of his life arrives and chaos threatens to ensue. (S4, ep 10).

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. (S1, ep 5).

Visionary companies including Black and Decker step up to create power tools that meet America's growing need for speed and efficiency. (S1, ep 6).

In 2008, nearly 850 people are killed in the Russo-Georgian War. How did it erupt and what is the current relationship between the two nations? (S2, ep 3).

In Cyprus, a UN peacekeeper fights off deadly foe with the help of a mysterious power. Meanwhile, a strange presence is encountered at an Alaskan air force base. (S1, ep 3).

In Montana's Glacier National Park, some claim that there is a hidden underground Nazi base that may even have been the final hideout for Hitler himself. (S1, ep 5).

From inexplicable disappearances to mysterious experiments, events in Mount Shasta National Park may be explained by an ancient Karuk Indian legend. (S1, ep 6).

Since 2017, the Navy has been releasing photos and videos of UFOs. Theorists suggest the images are nearly identical to accounts from centuries ago. (S14, ep 7).

Experts question whether ancient myths provide evidence that reptillian aliens are more than just pop-culture creations and staples of science-fiction. (S6, ep 12).

A major setback during a restoration blows Mike's budget, while the biggest financial gamble of his life arrives and chaos threatens to ensue. (S4, ep 10).

Japan, 1612: Green Beret Terry Schappert examines a climatic duel between legendary samurai Musashi and arch rival Kojiro to determine what it takes to be a warrior.

An exploration of 3000 years of ancient Egyptian history through the amazing stories of 10 of its most famous and spectacular buildings. (S1, ep 1).

Alice looks into the history of York, taking part in a Viking battle and examining an almost 1,000-year-old poo. (2 of 6).

Following a 2017 public disclosure of secret government UFO investigations, are we any closer to proving there has been a UFO conspiracy? (S11, ep 1).

World War II breaks out and a force of U-boats attempt to starve Britain into submission. Meanwhile, Vera Laughton Mathews recruits talented women into the Wrens. (S1, ep 1).

Analysis of biblical scripture leads the team to investigate sacred sites and ancient tombs as they retrace the possible journey of the lost artefact. (S1, ep 3).

Visionary companies including Black and Decker step up to create power tools that meet America's growing need for speed and efficiency. (S1, ep 6).

Of all the Hindu gods, none is more important than Shiva, the great destroyer. Could the deity have been the leader of an extraterrestrial race? (S9, ep 16).

Experts investigate whether ancient tales of beings with super-human powers could be inspired by extra-terrestrials who came to Earth in the past. (S6, ep 13).

Suggs and Stephen are back on the hunt for more relics from World War 2, and hope searching the site of a bomb factory won't yield anything too explosive. (S1, ep 7).

Tony traces the Norman conquest of this part of Wales, which still feels more English than the rest of the country, nearly 1000 years later. (S3, ep 3).

Alice tries some eel pie and investigates the origins of modern surgery as she explores the Norman period of British history by examining the town of Winchester. (3 of 6).

The Roman Empire was the most powerful in the world and became one of the largest in history. This episode explores the sites that defined its dominance. (S1, ep 2).

The Ark of the Covenant is believed to possess a mythical power. The team trace the ark's destructive path to uncover the truth behind its elusive journey. (S1, ep 4).

Ted takes the plunge by starting his own salvage business and he gets off to a flyer at an abandoned, treasure-laden wrecking yard. (S3, ep 1).

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. (S1, ep 6).

Two rival inventors with a desire to improve things for the world go head-to-head in the realm of wireless communication. (S1, ep 7).

Thousands of UFO sightings and abductions are reported every year. This series examines these accounts and casts new light on historic cases. (S1, ep 6).

What is the identity of a bizarre creature spotted on a driveway? And did the Men in Black threaten a man? (S4, ep 3).

This ornate, gold-plated chest housed the 10 commandments given to Moses by God and is said to have been built some 3,000 years ago. (S1, ep 3).

Millions have reported encountering shadowy entities around the world who instil fear and even paralysis. Are they imaginary, or otherwordly visitors? (S14, ep 8).

Experts investigate whether ancient tales of beings with super-human powers could be inspired by extra-terrestrials who came to Earth in the past. (S6, ep 13).

Ted takes the plunge by starting his own salvage business and he gets off to a flyer at an abandoned, treasure-laden wrecking yard. (S3, ep 1).

In 1565, the Knights of Saint John defended Malta from attacking Ottomans. Terry Schappert reveals what it was like to be a warrior in one of history's greatest sieges.

The Roman Empire was the most powerful in the world and became one of the largest in history. This episode explores the sites that defined its dominance. (S1, ep 2).

Alice tries some eel pie and investigates the origins of modern surgery as she explores the Norman period of British history by examining the town of Winchester. (3 of 6).

Researchers claim hidden messages can be found within the works of Leonardo da Vinci that may reveal an extraterrestrial influence. (S11, ep 2).

Experts explore the similarities between huge pyramids across the world. Could extraterrestrials have influenced their construction and design? (S4, ep 6).

France falls in 1940 and Donitz's U-boats embark on a race to sink British merchant ships. Roberts' wargaming ideas are at last entertained by a desperate Admiralty. (S1, ep 2).

The Ark of the Covenant is believed to possess a mythical power. The team trace the ark's destructive path to uncover the truth behind its elusive journey. (S1, ep 4).

Two rival inventors with a desire to improve things for the world go head-to-head in the realm of wireless communication. (S1, ep 7).

A look at the fire-breathing dragons, appearing in tales throughout the ancient world and worshipped as the bringers of great knowledge. (S14, ep 9).

Inventor Nikola Tesla claimed to have direct communication with beings on other planets. Could this genius scientist have been a human 'receiver'? (S6, ep 14).

Suggs and WW2 militaria expert Stephen Taylor bring forgotten stories of World War II back to life by unearthing artefacts from sites across the UK. (S1, ep 8).

For five years, the Channel Islands were occupied by Nazi Germany. Here, Tony traces the still-visible story of the occupation. (S3, ep 4).

Alice experiences humiliating Tudor justice as she dives into the story of Tudor England by studying the history of Norwich. (4 of 6).

Using CGI, contributions from experts in their fields and re-enactments, visit sites such as the Dome of the Rock in Jerusalem and the Great Mosque of Damascus. (S1, ep 3).

Experts follow the trail of the elusive order of the Knights Templar - believed to have located and seized the Ark of the Covenant centuries ago. (S1, ep 5).

Ted and his team salvage a farmhouse built by settlers who fled the American revolution. Brandon takes a gamble to save some valuable lightning rods. (S3, ep 2).

Garth Barnard investigates World War II air accidents, starting with a B-25 training crash in Virginia that killed five crew. (S1, ep 1).

With America plugging in to electric power, a flood of industry-changing innovation revolutionises the home and makes housework easier. (S1, ep 8).

Archaeologists investigate the full story of how the most famous Roman leader, Julius Caesar, rose to power and the battle that took him to the brink of defeat. (2 of 2).

In 1947, ancient scrolls were discovered in desert caves near the Dead Sea. One of them spells out - in chilling detail - a future apocalyptic war. (S1, ep 2).

Enslaved by the Romans, Carpophorus gets trained to fight beasts in the Colosseum for the public's amusement. (S1, ep 3).

A look at the fire-breathing dragons, appearing in tales throughout the ancient world and worshipped as the bringers of great knowledge. (S14, ep 9).

Inventor Nikola Tesla claimed to have direct communication with beings on other planets. Could this genius scientist have been a human 'receiver'? (S6, ep 14).

Ted and his team salvage a farmhouse built by settlers who fled the American revolution. Brandon takes a gamble to save some valuable lightning rods. (S3, ep 2).

In 479BC, the Spartans beat the Persians to avenge their defeat at Thermopylae. Discover what it was like to fight in one of history's most tactical battles.

Using CGI, contributions from experts in their fields and re-enactments, visit sites such as the Dome of the Rock in Jerusalem and the Great Mosque of Damascus. (S1, ep 3).

Alice experiences humiliating Tudor justice as she dives into the story of Tudor England by studying the history of Norwich. (4 of 6).

In 2017, a strange, cigar-shaped object enters the solar system, causing some astronomers to suggest that it could be an extraterrestrial craft. (S11, ep 3).

Ancient astronaut theorists hunt for evidence linking Bigfoot to alien species from the distant past. Could the ape-like giant be an extraterrestrial? (S4, ep 7).

Though the Admiralty are convinced the Allies have the expertise to defeat Germany, Roberts and the Wrens start devising wargaming tactics to combat U-boat formations. (S1, ep 3).

Experts follow the trail of the elusive order of the Knights Templar - believed to have located and seized the Ark of the Covenant centuries ago. (S1, ep 5).

With America plugging in to electric power, a flood of industry-changing innovation revolutionises the home and makes housework easier. (S1, ep 8).

As more people open their minds to UFOs and extraterrestrial visits from lightyears away, this episode explores whether aliens can bend both time and space. (S14, ep 10).

Ancient Astronaut Theorists investigate how ancient aliens may have helped to guide and define mankind in the remote past. (S6, ep 15).

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

On the 800th anniversary of the signing of the Magna Carta, Tony unravels the history from the myths surrounding King John and Robin Hood. (S3, ep 5).

Alice studies the history of Cheltenham, Britain's most Regency town. She attends a period society ball, investigates the rigid social hierarchy and more. (5 of 6).

Travel through the remote jungles of Central America to discover the extraordinary history of the grandest and most spectacular cities inhabited by the Maya. (S1, ep 4).

Was the Ark of the Covenant stolen by King Solomon's son and taken to Ethiopia? Archaeologists investigate new, mysterious leads to uncover the truth. (S1, ep 6).

At the site of a famous old hotel, Ted has a mountain of salvage to deal with and a ghost. (S3, ep 3).

Explore the complex case of the death of Wladyslaw Sikorski, the Polish PM whose plane crashed soon after taking off in 1943. (S1, ep 2).

The story of a deadly war that intertwines Germany, Poland, Japan, Italy and Spain, and the remorseless development of weapons and bombers. (1 of 6).

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. (S1, ep 11).

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. (S1, ep 12).

Craig Charles joins forces with world-renowned space journalist Sarah Cruddas to investigate some of the most perplexing UFO encounters of recent times. (S1, ep 3).

Examine a variety of diabolical booby traps used to ensnare treasure hunters, outwit body snatchers or gravely harm wartime enemies. (S1, ep 3).

As more people open their minds to UFOs and extraterrestrial visits from lightyears away, this episode explores whether aliens can bend both time and space. (S14, ep 10).

Ancient Astronaut Theorists investigate how ancient aliens may have helped to guide and define mankind in the remote past. (S6, ep 15).

At the site of a famous old hotel, Ted has a mountain of salvage to deal with and a ghost. (S3, ep 3).

In 1879, the Zulus overwhelmed the British in their worst defeat by a colonial force. Discover what it was like to be a warrior in the Battle of Isandlwana.

Travel through the remote jungles of Central America to discover the extraordinary history of the grandest and most spectacular cities inhabited by the Maya. (S1, ep 4).

Alice studies the history of Cheltenham, Britain's most Regency town. She attends a period society ball, investigates the rigid social hierarchy and more. (5 of 6).

Did Mother Nature cause the volcanoes, earthquakes and floods of ancient times? Or could aliens have been responsible? Experts investigate. (S4, ep 4).

Thousands of people from every part of the world have reported being abducted by aliens, including even a world leader - President Kiran Ilyumzhinov. (S9, ep 15).

Researchers claim hidden messages can be found within the works of Leonardo da Vinci that may reveal an extraterrestrial influence. (S11, ep 2).

Churchill's - and Britain's - influence begins to shrink as the Soviet Union and the United States grow into the most significant actors in the war. (4 of 4).

A high-rise hotel under construction on a busy New Orleans street unexpectedly collapses, leaving citizens baffled. (3 of 6).

In 2017, a strange, cigar-shaped object enters the solar system, causing some astronomers to suggest that it could be an extraterrestrial craft. (S11, ep 3).

Of all the Hindu gods, none is more important than Shiva, the great destroyer. Could the deity have been the leader of an extraterrestrial race? (S9, ep 16).

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. (S1, ep 9).

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. (S1, ep 10).

The Tesla Experiment. Giorgio A Tsoukalos draws on evidence from past series as he asks whether Nikola Tesla was communicating with extraterrestrials. (S1, ep 3).

Mike builds a 1964 Parisienne for a big family, while Avery scores his first client of the year and puts together a 1975 Ford Bronco. (S4, ep 9).

Ted takes the plunge by starting his own salvage business and he gets off to a flyer at an abandoned, treasure-laden wrecking yard. (S3, ep 1).

from hidden worlds to unexplainable natural phenomena. (S4, ep 5).

from hidden worlds to unexplainable natural phenomena. (S4, ep 6).

An elite group of British paratroopers launch a midnight raid in order to capture Hitler's unusual radar equipment. (S1, ep 6).

Enslaved by the Romans, Carpophorus gets trained to fight beasts in the Colosseum for the public's amusement. (S1, ep 3).

Examine a variety of diabolical booby traps used to ensnare treasure hunters, outwit body snatchers or gravely harm wartime enemies. (S1, ep 3).

Thousands of UFO sightings and abductions are reported every year. This series examines these accounts and casts new light on historic cases. (S1, ep 6).

What is the identity of a bizarre creature spotted on a driveway? And did the Men in Black threaten a man? (S4, ep 3).

The Tesla Experiment. Giorgio A Tsoukalos draws on evidence from past series as he asks whether Nikola Tesla was communicating with extraterrestrials. (S1, ep 3).

Oak Island treasure hunter Marty Lagina and Ancient Astronaut theorist Giorgio A. Tsoukalos explore the ancient ruins of Sardinia, Italy. (S11, ep 7).

Could Area 51's notoriety act as a cover up to much bigger, top-secret extraterrestrial experiments taking place at multiple locations? (S11, ep 6).

After a series of dark and ominous events, an unassuming family home on Long Island becomes the most notorious house in America. (S1, ep 5).

Theo Wilson time travels to the mid-1800s where he finds Jesse James and explores how his thirst for fame and riches led to his tragic murder. (S1, ep 5).

Theo Wilson finds himself in the lair of America's first famous serial killer, HH Holmes, and follows his path from con man to murderer. (S1, ep 6).

Seven stone giants stand guard over a Pacific island. But what are they protecting? And from whom? (S11, ep 9).

Experts open up NASA and secret government files. Can they find proof of alien contact in the recent or ancient past? (S4, ep 5).

Following a 2017 public disclosure of secret government UFO investigations, are we any closer to proving there has been a UFO conspiracy? (S11, ep 1).

Bobby Bognar explores buffets and their most popular dishes, as he catches shrimp by tickling them in Florida; makes horseradish in Wisconsin and finds the biggest buffet in Las Vegas.

From the Romans, who created a hydraulic mining system, to castle defenders who listened for invading miners, discover ancient mining machines through the ages.

Few know that one of the US's most mysterious National Parks is in Puerto Rico - a place some believe is home to a creature known as the Chupacabra. (S1, ep 7).

Many believe Gettysburg National Military Park is haunted by its violent past - here, explore some incredible claims about the park's history. (S1, ep 8).

Was Leonardo Da Vinci, one of history's great thinkers also one of its greatest prophets? And did he envision world destruction? (S1, ep 3).

Enslaved by the Romans, Carpophorus gets trained to fight beasts in the Colosseum for the public's amusement. (S1, ep 3).

Discover the myth of ancient Greece's most feared god. Hades takes us behind the veil of the ancient Greek belief in life after death with chilling tales. (S1, ep 2).

A major setback during a restoration blows Mike's budget, while the biggest financial gamble of his life arrives and chaos threatens to ensue. (S4, ep 10).

Ted and his team salvage a farmhouse built by settlers who fled the American revolution. Brandon takes a gamble to save some valuable lightning rods. (S3, ep 2).

While hiking a woman has a terrifying encounter with an entity from another world. (S2, ep 5).

A look into the predictive power of the subconscious, including a man who warns of a plane crash before it happens following a series of vivid nightmares. (S3, ep 7).

With 3D recreations of the wreck, discover the story of the ship said to have sailed ablaze within the Northumberland Strait. (S1, ep 2).

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? (S12, ep 35).

A security officer is visited by an unearthly presence at a nuclear launch site, before waking up miles away. Meanwhile, a higher power seems to protect a US Army gunner. (S1, ep 4).

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. (1 of 4).