From gunpowder to missiles, were these lethal weapons the product of human innovation or created with help from another, otherworldly source? (S3, ep 9).

Thanks to the heroic acts of sailors, America scored a stunning win in the battle of Guadalcanal, loosening Japan's mighty grip on the Pacific. (S4, ep 4).

In Madagascar, paleontologists discover an near-perfect fossil unlike any known animal, and bizarre stone spheres are found in Costa Rica. (S1, ep 3).

The troubled beginnings and amazing exploits of the legendary British heavy bomber. Plus, see a replica up close. (1 of 6).

Since the 20th century, scientists, journalists and investigators have been documenting UFOs. Today, there is even more proof of extraterrestrial visitation.

Theorists investigate whether sought-after religious relic the Ark of the Covenant could hold connections to our extraterrestrial past. (S6, ep 2).

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. (S1, ep 2).

Tony heads out on a 40-mile walk through the wild, dramatic and romantic Peak District - the place where the Industrial Revolution began. (S1, ep 2).

In the 5th century BC, Pericles paved the way for western civilisation when he raided defence funds to build Athens. Experts re-create this first major city.

As the Roman Empire expands its reaches into what is now Germany, its legions are faced with ferocious Germanic tribesmen. (S1, ep 4).

In Madagascar, paleontologists discover an near-perfect fossil unlike any known animal, and bizarre stone spheres are found in Costa Rica. (S1, ep 3).

While Avery struggles to save his business, old secrets and conflicts with Connor disrupts Mike as he tries to end the year on a high note. (S3, ep 12).

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. (S1, ep 1).

A look at the later, clipped wing version flown by Czech refugee pilots in the UK during World War II. Plus, a tour of a restored example. (2 of 6).

In 1944, 28 Greek socialists were shot in Syntagma Square and 100,000 had perished by the end of the Civil War. Was this the old order Winston Churchill had longed for? (S2, ep 1).

An Air Force Police Officer sees a strange aircraft near a shimmering light before developing skin cancer. Were the events related? Later, a staff sergeant sees a shadowy figure. (S1, ep 1).

A strange series of events in Grand Canyon National Park leads researchers to speculate whether its power comes from forces that cannot be explained. (S1, ep 1).

A plane crash in the Everglades National Park leads to strange hauntings - and some believe the park may exert a dark, transformative power. (S1, ep 2).

Since the 20th century, scientists, journalists and investigators have been documenting UFOs. Today, there is even more proof of extraterrestrial visitation.

Theorists investigate whether sought-after religious relic the Ark of the Covenant could hold connections to our extraterrestrial past. (S6, ep 2).

While Avery struggles to save his business, old secrets and conflicts with Connor disrupts Mike as he tries to end the year on a high note. (S3, ep 12).

Created during the Bolshevik Revolution, find out how this training eventually spread to the masses and became an official, competitive Soviet sport.

As the Roman Empire expands its reaches into what is now Germany, its legions are faced with ferocious Germanic tribesmen. (S1, ep 4).

In the 5th century BC, Pericles paved the way for western civilisation when he raided defence funds to build Athens. Experts re-create this first major city.

Ancient Astronaut theorists suggest that aliens have been guiding mankind in secret to bring about huge leaps in technological advancement. (S9, ep 6).

Experts investigate creepy places associated with death. Could otherworldly connections be responsible for strange disappearances and suicides? (S3, ep 10).

Mutinies have remained rare over the centuries of naval history, but when they do happen they are highly charged and often inspiring events. (S4, ep 5).

In the depths of the tropical lowlands of Northern Colombia, scientists discover a gargantuan, unidentified animal vertebra. (S1, ep 4).

A look at the later, clipped wing version flown by Czech refugee pilots in the UK during World War II. Plus, a tour of a restored example. (2 of 6).

An investigation into amazing ancient sites built with acoustic purpose, indicating that their builders could have been aware of a harmonic code.

Throughout time, people have believed mountains were the home of the divine. But could these hilltop spirits have been extraterrestrials? (S6, ep 3).

Exploring the impact of the Battle of Hastings in 1066, Karl and Kevin continue their look at how weapons and body armour developed. (S1, ep 3).

Tony Robinson takes a 45-mile hike through the beautiful countryside of the Weald in Kent and East Sussex, discovering its rich and surprising Tudor heritage. (S1, ep 3).

These Christian warrior monks reigned supreme for nearly 200 years. What secrets will the city of Tortosa and Jerusalem's Temple Mount reveal about the holy guardians.

It is 47 AD. Emperor Claudius is considered a village idiot and can only hang onto his throne by waging a spectacular conquest. He chooses Britannia. (S1, ep 5).

In the depths of the tropical lowlands of Northern Colombia, scientists discover a gargantuan, unidentified animal vertebra. (S1, ep 4).

Mike and Avery recover a valuable abandoned Volkswagen, while threats from the authorities force Mike to make a surprising decision. (S4, ep 1).

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. (S1, ep 2).

The Luftwaffe's Frontline Fighter: The astonishing story of the 109 and its modified variants, best known for its role in the Battle of Britain. (3 of 6).

Thousands of UFO sightings and abductions are reported every year. This series examines these accounts and casts new light on historic cases. (S1, ep 4).

Tony Harris separates the real from the fake in some of the most compelling Bigfoot evidence recently captured, including huge primate-like footprints. (S4, ep 1).

The Pyramids of Giza are the only surviving wonder of the ancient world, becoming a UNESCO World Heritage Site in 1979. But what truths are they hiding? (S1, ep 1).

An investigation into amazing ancient sites built with acoustic purpose, indicating that their builders could have been aware of a harmonic code.

Throughout time, people have believed mountains were the home of the divine. But could these hilltop spirits have been extraterrestrials? (S6, ep 3).

Mike and Avery recover a valuable abandoned Volkswagen, while threats from the authorities force Mike to make a surprising decision. (S4, ep 1).

Martial Art Of Malaysia: Find out why Silat is one of the most intriguing fighting systems on the planet as our adventurers face a pitched battle against six Silat masters.

It is 47 AD. Emperor Claudius is considered a village idiot and can only hang onto his throne by waging a spectacular conquest. He chooses Britannia. (S1, ep 5).

These Christian warrior monks reigned supreme for nearly 200 years. What secrets will the city of Tortosa and Jerusalem's Temple Mount reveal about the holy guardians.

As science turns towards augmenting humanity with technology, theorists suggest that we are merely following the path of our alien creators. (S9, ep 7).

Could the Founding Fathers have hidden secrets about ancient aliens in their documents, buildings and symbols? Experts investigate. (S3, ep 11).

Examine America's fantastic success stories against raiders, with brilliant tactics, bold crews and some mighty combat ships. (S4, ep 6).

In the Philippines, archaeologists discover the remains of an ancient rhinoceros. Elsewhere, a Brazilian island is infested with thousands of vipers. (S1, ep 5).

The Luftwaffe's Frontline Fighter: The astonishing story of the 109 and its modified variants, best known for its role in the Battle of Britain. (3 of 6).

Peru - famous for its prehistoric ruins - is one of the most mysterious places on Earth - but could it also be a site of extraterrestrial visitation.

Experts investigate strange carvings from 8,000 BC and unexplained sightings in the New World. Is there more to the US's past than history books suggest? (S6, ep 4).

Presenter Karl Ude-Martinez takes a tour of the weapons used during the Battle of the Somme in 1916, including machine guns and poison gas. (S1, ep 4).

Tony takes a tough four-day trek through the Kintail region of the Highlands to discover the incredible story of the Jacobite Uprisings of the early 1700s. (S1, ep 4).

The US had to beat the Nazis in the race to create an atomic bomb, so they built many secret nuclear facilities. Here, the controversial sites are re-created.

As expansive military campaigns and raids by Dacian tribes begin to test the Roman Empire's finances, pressure builds on Emperor Domitian. (S1, ep 6).

In the Philippines, archaeologists discover the remains of an ancient rhinoceros. Elsewhere, a Brazilian island is infested with thousands of vipers. (S1, ep 5).

Avery gambles on completing a build from his past as authorities crack down on his vehicle-filled property, while Mike finishes his '55 LaFrance fire truck. (S4, ep 2).

After finding artefacts at a sunken pier, Darrell and his team discover a possible component of a secret weapon used by the Nazis. (S1, ep 3).

Superfortress: The story of the prolonged development and the initially troubled operational history of the Boeing B29 Superfortress. (4 of 6).

The Viking Age saw major changes in the economy of Scandinavia. Tim Sutherland travels to Norway and Estonia to find out more about the bullion economy. (S1, ep 4).

A chilling recreation of the unsettling version of Germany that Adolf Hitler had wanted to create, complete with monstrous monuments and built on slave labour.

Roman emperor Titus plans 100 days of games to commemorate the Colosseum's completion in 80 AD, including a fight to the death between Priscus and Verus. (S1, ep 1).

Peru - famous for its prehistoric ruins - is one of the most mysterious places on Earth - but could it also be a site of extraterrestrial visitation.

Experts investigate strange carvings from 8,000 BC and unexplained sightings in the New World. Is there more to the US's past than history books suggest? (S6, ep 4).

Avery gambles on completing a build from his past as authorities crack down on his vehicle-filled property, while Mike finishes his '55 LaFrance fire truck. (S4, ep 2).

Literally translated to mean 'old boot,' Savate developed in France in the 1800s. Jason and Bill navigate the dockyards of Marseille to uncover its secrets.

As expansive military campaigns and raids by Dacian tribes begin to test the Roman Empire's finances, pressure builds on Emperor Domitian. (S1, ep 6).

The US had to beat the Nazis in the race to create an atomic bomb, so they built many secret nuclear facilities. Here, the controversial sites are re-created.

Ancient Astronaut theorists look at the Aborigine legend of Dreamtime, and ask if these stories hold the proof that aliens created life on Earth. (S9, ep 8).

Experts investigate the mysterious Creation of Man, asking whether unexplained advances in human evolution could have been down to aliens. (S3, ep 12).

Discover some of history's most ground-breaking vessels, from Britain's HMS Warrior of 1860 to the German battlecruisers of WWII. (S4, ep 7).

In the northwestern Pacific, a tourist stumbles across a mysterious structure. Elsewhere, an unsettling sight is revealed on the island of New Guinea. (S1, ep 6).

Superfortress: The story of the prolonged development and the initially troubled operational history of the Boeing B29 Superfortress. (4 of 6).

A look at Mount Shasta in northern California, which is rumoured to be a hotbed of strange events and otherworldly visitors from Bigfoot to UFOs.

Experts investigate remote ruins, mysterious caves and legendary mountain portals. Could these alleged stargates have brought ancient aliens to Earth? (S6, ep 5).

Revisiting the bloody British uprising against the Romans, presenter Karl Ude-Martinez tests out swords, spears and armour. (S1, ep 5).

Walking from the stone circles of Avebury to Stonehenge, Tony explores the connections between Europe's finest collection of Neolithic monuments. (S2, ep 1).

Legend has it that this ancient civilisation was wiped out by a volcanic eruption, but could the discovery of spectacular palaces in Crete and Santorini challenge the theory.

Marcus Aurelius inherits a rapidly growing Roman Empire, embroiled in a war on two fronts. But can he bring peace and prosperity back to the Empire? (S1, ep 7).

In the northwestern Pacific, a tourist stumbles across a mysterious structure. Elsewhere, an unsettling sight is revealed on the island of New Guinea. (S1, ep 6).

Mike restores a 1971 Super Bee, struggles to sell cars and hunts for a new place to live. (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).

Germany's Frontline Bomber: A look at one of the most-recognised German aircrafts of WWII and how it became a guinea pig for future bombers. (5 of 6).

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).

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 1).

Witness the dark origin stories behind some of history's most notorious methods of execution, from the guillotine to the electric chair. (S1, ep 1).

A look at Mount Shasta in northern California, which is rumoured to be a hotbed of strange events and otherworldly visitors from Bigfoot to UFOs.

Experts investigate remote ruins, mysterious caves and legendary mountain portals. Could these alleged stargates have brought ancient aliens to Earth? (S6, ep 5).

Mike restores a 1971 Super Bee, struggles to sell cars and hunts for a new place to live. (S4, ep 3).

America's Extreme Fighting: Mixed Martial Arts is the fastest-growing martial art in the world. Jason and Bill travel to Los Angeles, where they train with experts.

Marcus Aurelius inherits a rapidly growing Roman Empire, embroiled in a war on two fronts. But can he bring peace and prosperity back to the Empire? (S1, ep 7).

Legend has it that this ancient civilisation was wiped out by a volcanic eruption, but could the discovery of spectacular palaces in Crete and Santorini challenge the theory.

Experts search for proof of alien visitors in the ruins of lost civilisations. Could Mayan carvings reveal a city once ruled by otherworldly beings? (S3, ep 8).

Ancient Astronaut theorists examine the creation myth of.

Ancient Astronaut theorists suggest that aliens have been guiding mankind in secret to bring about huge leaps in technological advancement. (S9, ep 6).

The story continues with a look at his time as Prime Minister of the United Kingdom, a time where his notable speeches were born. (2 of 4).

Italy falls victim to one of the worst engineering disasters when the Morandi bridge suddenly collapses. (4 of 6).

Ancient Astronaut theorists look at the Aborigine legend of Dreamtime, and ask if these stories hold the proof that aliens created life on Earth. (S9, ep 8).

Experts investigate creepy places associated with death. Could otherworldly connections be responsible for strange disappearances and suicides? (S3, ep 10).

In 1966, a class of Melbourne students spot a UFO and are told never to speak of the incident. A man's car dies in 2009 after he spots a cigar-shaped object in the New York sky. (S1, ep 5).

A teenager sees a mushroom-shaped object appear in the field while feeding his sheep in 1971. In 2000, police officers in Illinois chase a triangular UFO the size of a house. (S1, ep 6).

Giorgio Tsoukalos draws on evidence from past series as he takes an in-depth look at the mystery of Southern Peru's Nasca Lines. (S1, ep 1).

A nightmare ensues when Connor enlists Rust Bros on a personal build. Avery goes over budget on his dream truck and James revives a project from his past. (S3, ep 11).

Mike and Avery recover a valuable abandoned Volkswagen, while threats from the authorities force Mike to make a surprising decision. (S4, ep 1).

from hidden worlds to unexplainable natural phenomena. (S4, ep 1).

from hidden worlds to unexplainable natural phenomena. (S4, ep 2).

December 1941: Under cover of a fierce naval bombardment, a taskforce of elite British commandos sail towards the Norwegian town of South Vaagso. (S1, ep 4).

Roman emperor Titus plans 100 days of games to commemorate the Colosseum's completion in 80 AD, including a fight to the death between Priscus and Verus. (S1, ep 1).

Witness the dark origin stories behind some of history's most notorious methods of execution, from the guillotine to the electric chair. (S1, ep 1).

Thousands of UFO sightings and abductions are reported every year. This series examines these accounts and casts new light on historic cases. (S1, ep 4).

Tony Harris separates the real from the fake in some of the most compelling Bigfoot evidence recently captured, including huge primate-like footprints. (S4, ep 1).

Giorgio Tsoukalos draws on evidence from past series as he takes an in-depth look at the mystery of Southern Peru's Nasca Lines. (S1, ep 1).

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).

The disappearance of a powerful union activist from a Detroit suburb remains one of the most notorious missing person cases of all time. (S3, ep 1).

Theo Wilson explores the world's most luxurious airship, the Hindenburg, where he must solve the mystery of what caused its fiery fall from the sky. (S1, ep 1).

America's Deadliest Flood: Theo Wilson time travels back to 1889 and the bucolic river shores of Johnstown, Pennsylvania, where the biggest flood in US history brews. (S1, ep 2).

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

From gunpowder to missiles, were these lethal weapons the product of human innovation or created with help from another, otherworldly source? (S3, ep 9).

As we look forward to the first astronauts reaching Mars in the next 20 years, is there evidence to suggest human life was first seeded there? (S9, ep 5).

As science turns towards augmenting humanity with technology, theorists suggest that we are merely following the path of our alien creators. (S9, ep 7).

Bobby checks out the world of Southern fried food, exploring catfish and alligator farms and extracting frying oil from lint-covered cottonseed. (S1, ep 5).

How did the ancients get oil from the ground without modern drills? And build a bridge across the Rhine in just 10 days? Experts investigate. (S1, ep 10).

The Hawaii Volcanoes National Park is the site of strange events. Are they linked to the legendary Native Hawaiian Goddess of the Volcano, Pele? (S1, ep 3).

Are UFO sightings at Joshua Tree linked to an anti-aging machine and a powerful creature called the Yucca Man? (S1, ep 4).

Sir Isaac Newton is considered one of history's great geniuses, but did you know he also predicted the date of the apocalypse? (S1, ep 1).

Roman emperor Titus plans 100 days of games to commemorate the Colosseum's completion in 80 AD, including a fight to the death between Priscus and Verus. (S1, ep 1).

Follow the tale of the strongest superhero in Greek mythology and his quest for redemption: a series of impossible challenges to atone for a heinous crime. (S1, ep 3).

While Avery struggles to save his business, old secrets and conflicts with Connor disrupts Mike as he tries to end the year on a high note. (S3, ep 12).

Avery gambles on completing a build from his past as authorities crack down on his vehicle-filled property, while Mike finishes his '55 LaFrance fire truck. (S4, ep 2).

A cow is mutilated, a man is repeatedly abducted from his bed, and an astronomer's telescope intercepts a mysterious message. (S2, ep 1).

Stories that suggest aliens are among us, including an Arizona woman who claims to have been fathered by an alien in a top-secret government experiment.

Thousands of UFO sightings and abductions are reported every year. This series examines these accounts and casts new light on historic cases. (S1, ep 4).

New evidence reveals advanced civilisations might have existed on Earth thousands of years ago - is it possible that they lived with extraterrestrials? (S12, ep 28).

US Navy Seaman Jesse Castillo sees a boy appear and disappear in Italy, while Military Police Officer Auburn White finds herself levitating after falling asleep. (S1, ep 2).

An investigation into the unshakable claims of treasure hunter Roger Miklos, who believed he had located a Nazi U-boat filled with treasure.

In numerous ancient cultures, stories were told of ancestors from the Pleiades star cluster - could new scientific findings reveal the truth? (S12, ep 29).

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).

Experts investigate remote ruins, mysterious caves and legendary mountain portals. Could these alleged stargates have brought ancient aliens to Earth? (S6, ep 5).

In an infamous Cold War cold case, nine hikers found mutilated on a remote mountain slope. 60 years later, what happened to them remains a mystery. (S3, ep 2).

Visit ancient architectural wonders and investigate how the Persians, Egyptians, Greeks and Romans accomplished their design and constructions without modern tools.

A look at Mount Shasta in northern California, which is rumoured to be a hotbed of strange events and otherworldly visitors from Bigfoot to UFOs.

Could claims of.

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

Discover some of history's most effective and deceptive lightning strikes, achieving victory through speed, precision and the element of surprise. (S4, ep 8).

A mysterious creature that glows in the dark is discovered in the Australian rainforest. Hundreds of human bones are found in a Belizean cave. (S1, ep 7).

Germany's Frontline Bomber: A look at one of the most-recognised German aircrafts of WWII and how it became a guinea pig for future bombers. (5 of 6).

In 2021, the US government broke a 70-year precedent of denying UFOs and released a groundbreaking report on Unidentified Aerial Phenomena. This is the full story.

Experts comb history for evidence of children with strange abilities and great knowledge. Could these young people have been born from ancient aliens? (S6, ep 6).

What was it like to face a Napoleonic cavalry charge? Find out as the cannon, grenade and Brown Bess musket go under the microscope. (S1, ep 6).

The Lake District is one of the country's most popular destinations - but few see how the conquering Roman army made their mark on the stunning landscape. (S2, ep 2).

St Paul laid the foundations for what became Christianity. He shaped our world. Now, using the latest research and CGI, see the world that created him.

With the civil war raging on, there's a new challenge ahead for Rome: the rise of the new religion of Christianity. The Empire is invaded by the Goths. (S1, ep 8).

A mysterious creature that glows in the dark is discovered in the Australian rainforest. Hundreds of human bones are found in a Belizean cave. (S1, ep 7).

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).

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 Wooden Wonder: The fascinating story behind the stunning wooden aircraft, which undertook some of the most daring and iconic raids of WWII. (6 of 6).

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

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

Adam has a phobia of tarantulas, and naturally, Caveman Rob picks two of the world's nastiest arachnids for them to endure, including a tarantula. (S2, ep 2).

In 2021, the US government broke a 70-year precedent of denying UFOs and released a groundbreaking report on Unidentified Aerial Phenomena. This is the full story.

Experts comb history for evidence of children with strange abilities and great knowledge. Could these young people have been born from ancient aliens? (S6, ep 6).

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).

Bill and Jason travel to Virginia, where they get a painful lesson in the combat style that has helped spawn the Marines' widely feared reputation.

With the civil war raging on, there's a new challenge ahead for Rome: the rise of the new religion of Christianity. The Empire is invaded by the Goths. (S1, ep 8).

St Paul laid the foundations for what became Christianity. He shaped our world. Now, using the latest research and CGI, see the world that created him.

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).

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

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. (S1, ep 1).

A mysterious site with huge stone blocks is discovered off the coast of Tanzania. In the Guatemalan rainforest, hundreds of human bones are found. (S1, ep 8).

The Wooden Wonder: The fascinating story behind the stunning wooden aircraft, which undertook some of the most daring and iconic raids of WWII. (6 of 6).

According to Ancient Astronaut Theorists, the placement of monoliths and their geological makeup could point to extraterrestrial intervention. (S14, ep 2).

Across the world, there are stories of treasures that have been lost for centuries. Could these ancient relics have been hidden by extraterrestrials? (S6, ep 7).

Suggs and WWII militaria expert Stephen Taylor unearth artefacts from former military sites - starting with a German bomber found in Liverpool. (S1, ep 1).

Tony takes in a stretch of the beautiful Cornish coast, discovering the history of smuggling - the biggest industry in the area back in the 18th century. (S2, ep 3).

Explore Stonehenge, one of the greatest monuments of the ancient world. Experts delve into a new theory that sheds light on how it was used by the people who built it.

With an empire ripped apart by civil war, Rome welcomes an extraordinary new emperor: Aurelian, rising from the rank of soldier to fight for his city. (S1, ep 9).

A mysterious site with huge stone blocks is discovered off the coast of Tanzania. In the Guatemalan rainforest, hundreds of human bones are found. (S1, ep 8).

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).

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).

Harvesting crops is gruelling work. See what part the tractor plays in helping farmers to get food on American tables. (S1, ep 1).

Since the Syrian civil war broke out in 2011, 400,000 have been killed in the conflict. Who is to blame for this and the terrible conditions in which its people live? (S2, ep 2).

US Navy Seaman Jesse Castillo sees a boy appear and disappear in Italy, while Military Police Officer Auburn White finds herself levitating after falling asleep. (S1, ep 2).

The Hawaii Volcanoes National Park is the site of strange events. Are they linked to the legendary Native Hawaiian Goddess of the Volcano, Pele? (S1, ep 3).

Are UFO sightings at Joshua Tree linked to an anti-aging machine and a powerful creature called the Yucca Man? (S1, ep 4).

According to Ancient Astronaut Theorists, the placement of monoliths and their geological makeup could point to extraterrestrial intervention. (S14, ep 2).

Across the world, there are stories of treasures that have been lost for centuries. Could these ancient relics have been hidden by extraterrestrials? (S6, ep 7).

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).

A look into the ancient fighting art of the mysterious Angkor Empire - Pradal Serey, a devastating striking art of bone shattering kicks and punches.

With an empire ripped apart by civil war, Rome welcomes an extraordinary new emperor: Aurelian, rising from the rank of soldier to fight for his city. (S1, ep 9).

Explore Stonehenge, one of the greatest monuments of the ancient world. Experts delve into a new theory that sheds light on how it was used by the people who built it.

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

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

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. (S1, ep 2).

A volcanic island called Kolombagara, with a secret cave, rises out of the Pacific Ocean. In Vietnam, bones from an unknown animal are found. (S1, ep 9).

Harvesting crops is gruelling work. See what part the tractor plays in helping farmers to get food on American tables. (S1, ep 1).

Some of the world's most iconic sacred temples were built atop the ruins of structures that are far more ancient. Do these locations hold powers? (S14, ep 3).

Experts question what probes on Mars may have found over the past 40 years. Could NASA be hiding proof of life on the Red Planet from the public? (S6, ep 8).

Suggs and WWII expert Stephen hunt for souvenirs left by flying ace Douglas Bader and the legendary Duxford Fliers. (S1, ep 2).

Tony travels along the first 50 miles of the iconic Liverpool-Leeds canal to Wigan Pier, uncovering some extraordinary Georgian and Victorian stories along the way. (S2, ep 4).

The Shag Harbour Mystery: Celine and Fabien investigate one of the most credible UFO sightings in history - a strange alien craft seen crashing into the ocean. (1 of 3).

A new emperor with a huge vision and undeniable power slowly gains control of the entire Roman empire following the end of the civil wars. (S1, ep 10).

A volcanic island called Kolombagara, with a secret cave, rises out of the Pacific Ocean. In Vietnam, bones from an unknown animal are found. (S1, ep 9).

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).

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).

Before planes were even a possibility, a rivalry brewed as two young dreamers envisioned a future where millions of passengers could be carried overseas. (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).

For centuries, the Holy Grail has been an object of mystery and fascination, with ties to the Last Supper and the crucifixion of Jesus Christ. (S1, ep 2).

Some of the world's most iconic sacred temples were built atop the ruins of structures that are far more ancient. Do these locations hold powers? (S14, ep 3).

Experts question what probes on Mars may have found over the past 40 years. Could NASA be hiding proof of life on the Red Planet from the public? (S6, ep 8).

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).

Green Beret Terry Schappert examines history's greatest warriors. Discover how a defiant Saxon defence withstood the might of the Viking fleet at the Battle of Maldon.

A new emperor with a huge vision and undeniable power slowly gains control of the entire Roman empire following the end of the civil wars. (S1, ep 10).

The Shag Harbour Mystery: Celine and Fabien investigate one of the most credible UFO sightings in history - a strange alien craft seen crashing into the ocean. (1 of 3).

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).

Experts scrutinise the Maya Calendar, which predicted the world would end in 2012. Could it have anticipated the arrival of an extraterrestrial god? (S4, ep 2).

After finding artefacts at a sunken pier, Darrell and his team discover a possible component of a secret weapon used by the Nazis. (S1, ep 3).

A cave bursting with bones is found in the jungles of Mexico. In Hawaii, archaeologists find unusual sculptures with big heads and bulging eyes. (S1, ep 10).

Before planes were even a possibility, a rivalry brewed as two young dreamers envisioned a future where millions of passengers could be carried overseas. (S1, ep 2).

After decades of secrecy, high-ranking government officials are now discussing UFOs. But why now? Some say the evidence has become too great to ignore. (S14, ep 4).

Throughout history, spiritual leaders known as shamans have healed, protected and advised. Could they really be in contact with extraterrestrial realms? (S6, ep 9).

Suggs and Stephen continue their hunt for buried WWII treasure, and discover a tank buried in a vineyard. (S1, ep 3).

Tony sets out on the trail of St Cuthbert across the ancient kingdom of Northumbria stretching across its 7th-century extent from Edinburgh to York. (S2, ep 5).

Sabotage At Sea?: Céline and Fabien Cousteau investigate whether an infamous sunken ship was deliberately attacked by spies on a top-secret mission. (2 of 3).

Violence erupts as the Romans and Barbarians try to co-exist in the empire. The Goths rebel under the leadership of Alaric, a man they call king. (S1, ep 11).

A cave bursting with bones is found in the jungles of Mexico. In Hawaii, archaeologists find unusual sculptures with big heads and bulging eyes. (S1, ep 10).

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).

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).

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).

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. (1 of 2).

Sir Isaac Newton is considered one of history's great geniuses, but did you know he also predicted the date of the apocalypse? (S1, ep 1).