A Russian Infantryman sees mysterious lights in a Chechnyan forest, while an intrepid Air Force engineer investigates the government's cover-up of UFOs.

Ian Roussel doubles down and builds up with an off-road project.

A hoard of golden coins was found in the prospecting district of California. Where did they come from and why did the owners never claim them.

Millions mourned the death of Elvis Presley in 1977, but he's been spotted hundreds of times since.

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

At a mysterious site in the Gobi Desert, experts discover a monster graveyard - a groundbreaking find containing treasures of alien beasts.

The story of the World War II aircraft carrier USS Enterprise. Join her as she sets sail in the Pacific on a mission to sink enemy submarines.

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

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

Experts investigate why so many UFOs have been spotted near remote islands. Could these far-removed spots be the earthly homes of aliens.

In 1969, the US government officially announced it would stop investigating UFOs, but declassified documents seem to tell another story.

Did the space race stop at just the Moon? Is there any truth to rumours of a secret Space Force developed by America for missions beyond Earth's orbit.

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

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

A hoard of golden coins was found in the prospecting district of California. Where did they come from and why did the owners never claim them.

Millions mourned the death of Elvis Presley in 1977, but he's been spotted hundreds of times since.

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

At a mysterious site in the Gobi Desert, experts discover a monster graveyard - a groundbreaking find containing treasures of alien beasts.

The story of the World War II aircraft carrier USS Enterprise. Join her as she sets sail in the Pacific on a mission to sink enemy submarines.

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

The remains of over 100 young Anglo-Saxon men are found under a planned car park in Hampshire.

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

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

Experts investigate why so many UFOs have been spotted near remote islands. Could these far-removed spots be the earthly homes of aliens.

In 1969, the US government officially announced it would stop investigating UFOs, but declassified documents seem to tell another story.

Did the space race stop at just the Moon? Is there any truth to rumours of a secret Space Force developed by America for missions beyond Earth's orbit.

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

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

Experts investigate if a series of house fires across the UK are linked to an allegedly cursed portrait.

'Death shall come on swift wings to him who disturbs the peace of the King,' so the inscription goes. Is there truly a curse that haunts the original discoverers of Tutankhamun.

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

People reveal details from their past lives as celebrities, while experts investigate evidence that suggests death may not be the end of our existence.

Hypnotherapist Adrian Finkelstein and his patient claim that they are Paul Bern and his wife, actress Jean Harlow, reincarnated.

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

Cold War spy satellite photographs of mysterious structures hidden in Poland's forest motivate local archaeologist Grzegorz Kiarszys to hunt them down.

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.

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

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

Theorists investigate whether sought-after religious relic the Ark of the Covenant could hold connections to our extraterrestrial past.

Jets are scrambled to intercept a UFO, but find they are unable to complete their Shoot Down Order.

For decades, governments around the world have investigated UFO sightings. How are these top-secret studies conducted.

The Search for the Loch Ness Monster: Andy joins a team of Nessie experts to carry out the biggest search for the Loch Ness Monster in 50 years.

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

People reveal details from their past lives as celebrities, while experts investigate evidence that suggests death may not be the end of our existence.

Hypnotherapist Adrian Finkelstein and his patient claim that they are Paul Bern and his wife, actress Jean Harlow, reincarnated.

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

Cold War spy satellite photographs of mysterious structures hidden in Poland's forest motivate local archaeologist Grzegorz Kiarszys to hunt them down.

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.

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

In 1989, 20,000 US troops entered Panama to overthrow military dictator Manuel Noriega and around 500 civilians were killed. What prompted the invasion.

Death Devices: Witness the dark origin stories behind some of history's most notorious methods of execution, from the guillotine to the electric chair.

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

Theorists investigate whether sought-after religious relic the Ark of the Covenant could hold connections to our extraterrestrial past.

Jets are scrambled to intercept a UFO, but find they are unable to complete their Shoot Down Order.

For decades, governments around the world have investigated UFO sightings. How are these top-secret studies conducted.

The Search for the Loch Ness Monster: Andy joins a team of Nessie experts to carry out the biggest search for the Loch Ness Monster in 50 years.

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

A strange creature was reportedly seen in a wooded area of Massachusetts by different people, all giving similar descriptions. Coincidence, collusion, or a genuine mystery.

A hoard of golden coins was found in the prospecting district of California. Where did they come from and why did the owners never claim them.

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.

In 1977, schoolchildren spot a cigar-shaped aircraft in Wales. The sighting transforms the quiet seaside town into a UFO hot spot.

Experts investigate if a series of house fires across the UK are linked to an allegedly cursed portrait.

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

A shipwreck in Lake Michigan has an incredible history. How did this vessel, once part of Hitler's push to win World War II, end up stranded in one of the Great Lakes.

The American Navy is on the offensive and the first strike is on the Solomon Islands. Join the USS Enterprise as it supports the first American invasion.

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

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

Throughout time, people have believed mountains were the home of the divine. But could these hilltop spirits have been extraterrestrials.

Those who claim to have been abducted by extraterrestrials give their accounts of the interior of their spacecrafts.

If aliens have visited Earth, what are their intentions? Do they wish to experiment on the human body, or the human mind as well.

Andy embarks on a mission to unearth the Cornish sites of King Arthur, before magnet fishing for Excalibur and visiting the grave of a legendary witch.

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

In 1977, schoolchildren spot a cigar-shaped aircraft in Wales. The sighting transforms the quiet seaside town into a UFO hot spot.

A strange creature was reportedly seen in a wooded area of Massachusetts by different people, all giving similar descriptions. Coincidence, collusion, or a genuine mystery.

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

A shipwreck in Lake Michigan has an incredible history. How did this vessel, once part of Hitler's push to win World War II, end up stranded in one of the Great Lakes.

The American Navy is on the offensive and the first strike is on the Solomon Islands. Join the USS Enterprise as it supports the first American invasion.

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

Floods in Uttarakhand raised fears of buried Cold War nukes, but scientists linked it to a glacier collapse and environmental impacts.

The Soldiers' Emperor: 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.

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

Throughout time, people have believed mountains were the home of the divine. But could these hilltop spirits have been extraterrestrials.

Those who claim to have been abducted by extraterrestrials give their accounts of the interior of their spacecrafts.

If aliens have visited Earth, what are their intentions? Do they wish to experiment on the human body, or the human mind as well.

Andy embarks on a mission to unearth the Cornish sites of King Arthur, before magnet fishing for Excalibur and visiting the grave of a legendary witch.

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

What is the Voynich Manuscript, and what secrets does the mysterious 500-year-old document hold.

Experts investigate whether a controversial union leader's disappearance is linked to the mob or if he went missing on his own accord.

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

Alleged sightings of leprechauns and fairies are nothing new in Ireland. Experts debate whether these Celtic creatures are fact or fiction.

A strange creature was reportedly seen in a wooded area of Massachusetts by different people, all giving similar descriptions. Coincidence, collusion, or a genuine mystery.

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

When satellites capture a massive crater in the picturesque English countryside, historian Martin Morgan heads there to investigate.

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.

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

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

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.

Alien encounters have offered a possible glimpse into the secrets of interstellar navigation. Could this one day ensure mankind's survival.

Advances in technology have given us unprecedented access to distant galaxies that may harbour life. However, alien life may be found closer to home.

Andy is back in Cornwall searching for legends, meeting a real-life mermaid and fishing for Cornwall's infamous sea serpent Morgawr.

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

Alleged sightings of leprechauns and fairies are nothing new in Ireland. Experts debate whether these Celtic creatures are fact or fiction.

Experts investigate if a mysterious caller had inside knowledge about the assassination of President John F Kennedy.

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

When satellites capture a massive crater in the picturesque English countryside, historian Martin Morgan heads there to investigate.

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.

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

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.

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

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

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.

Alien encounters have offered a possible glimpse into the secrets of interstellar navigation. Could this one day ensure mankind's survival.

Advances in technology have given us unprecedented access to distant galaxies that may harbour life. However, alien life may be found closer to home.

Andy is back in Cornwall searching for legends, meeting a real-life mermaid and fishing for Cornwall's infamous sea serpent Morgawr.

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

Experts and eyewitnesses explore some of the most-extraordinary happenings at Myrtles Plantation that science can't explain.

Numerous aviation disasters are associated with the number 191, leading many airlines to refuse to schedule a flight 191 out of skepticism and fear.

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.

Experts investigate whether a controversial union leader's disappearance is linked to the mob or if he went missing on his own accord.

Residents of a village reported seeing a statue of the Virgin Mary move, but some believe the phenomenon was just an optical illusion or a prank.

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

A perplexing, intricate symbol high up in the remote Peruvian Andes may be for the grisliest of child sacrifices - death by lightning strike.

The USS Enterprise is the only battle-ready American carrier in the Pacific. For her crew, the war has never been more personal when the Japanese attack.

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

Experts question whether the notion of rituals, such as funerals and festivals, was brought to earth by ancient extraterrestrial visitors.

Experts investigate remote ruins, mysterious caves and legendary mountain portals. Could these alleged stargates have brought ancient aliens to Earth.

As the world continues to evolve into the digital age, more and more people are capturing images in the sky that they are unable to explain.

For years many have argued that UFOs are as terrestrial as you or I. They may be correct, but not in the way they thought they were.

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

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

Experts investigate whether a controversial union leader's disappearance is linked to the mob or if he went missing on his own accord.

Residents of a village reported seeing a statue of the Virgin Mary move, but some believe the phenomenon was just an optical illusion or a prank.

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

A perplexing, intricate symbol high up in the remote Peruvian Andes may be for the grisliest of child sacrifices - death by lightning strike.

The USS Enterprise is the only battle-ready American carrier in the Pacific. For her crew, the war has never been more personal when the Japanese attack.

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

Revelation is the most terrifying book in the Bible, describing mankind's final days. But who will survive God's wrath? And when will it happen.

Your government's most clandestine inventions are never what you would suspect and that's exactly why no one ever saw them coming.

Experts question whether the notion of rituals, such as funerals and festivals, was brought to earth by ancient extraterrestrial visitors.

Experts investigate remote ruins, mysterious caves and legendary mountain portals. Could these alleged stargates have brought ancient aliens to Earth.

As the world continues to evolve into the digital age, more and more people are capturing images in the sky that they are unable to explain.

For years many have argued that UFOs are as terrestrial as you or I. They may be correct, but not in the way they thought they were.

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

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

Residents of a village reported seeing a statue of the Virgin Mary move, but some believe the phenomenon was just an optical illusion or a prank.

The White House is one of the most-famous and most-haunted residences in the world. Experts investigate claims of extraordinary paranormal activity.

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.

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

Inventor Nikola Tesla claimed to have direct communication with beings on other planets. Could this genius scientist have been a human 'receiver'.

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

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

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

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

Andy embarks on a mission to unearth the Cornish sites of King Arthur, before magnet fishing for Excalibur and visiting the grave of a legendary witch.

Andy is back in Cornwall searching for legends, meeting a real-life mermaid and fishing for Cornwall's infamous sea serpent Morgawr.

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

Inventor Nikola Tesla claimed to have direct communication with beings on other planets. Could this genius scientist have been a human 'receiver'.

With Allied victories and the liberation of Paris following D-Day, Vera is in a race against time to locate her missing agents.

As the Third Reich rises to power, Himmler fixates on the Holy Grail as his and the Nazis' desperation to capture this ancient relic intensifies.

It's July 10, 1943 and the Allied Forces have evicted the Axis Powers from North Africa and can finally begin the Italian Campaign.

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.

Ancient Greece's most powerful god wages an epic struggle against his father for control of the universe. It's the ultimate clash in what is mythology's greatest showdown.

While the allies aim to end Hitler's domination of Western Europe, British troops are secretly being trained for an enormous, amphibious operation.

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.

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

Inventor Nikola Tesla claimed to have direct communication with beings on other planets. Could this genius scientist have been a human 'receiver'.

In 1917, three young shepherd children from Fatima, Portugal, claimed to be instruments of divine prophecy. Was there truth to their allegations.

The most notorious madman in history, Adolf Hitler, was a murderer and a seducer of millions. But what role did prophecy and the occult play in his rise.

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

Investigate a machine which can supposedly read personalities, a mask painted with human blood and a cursed pot.

Ancient Astronaut Theorists investigate how ancient aliens may have helped to guide and define mankind in the remote past.

Experts question what the God Particle reveals about the origin of our world and whether clues to its significance could have been left by ancient aliens.

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

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

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

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

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

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

Ancient Astronaut Theorists investigate how ancient aliens may have helped to guide and define mankind in the remote past.

Experts question what the God Particle reveals about the origin of our world and whether clues to its significance could have been left by ancient aliens.

The White House meets its fate in a world without people, and the President's dog must learn the way of the wild.

What if every human on Earth disappeared? Discover what would happen to the world we have created, including our animals, buildings, landscape and bodies.

What would happen to Earth if all humans vanished? Outbreak examines the possibility of escaped animals, invasive vines and a deadly virus taking over control from humans.

Take a tour of some of the most significant breakthroughs in human history, from the digital revolution to the first aircraft to fly faster than the speed of sound.

The rock-hewn pillars of Gobekli Tepe in Turkey have baffled archaeologists for decades - who built this incredible monument, and why.

The tomb of Qin Shi Huang, the first emperor of China, remains one of the most famous and secretive archaeological sites in the world.

In China, a burial site reveals a child's remains marked with peculiar modifications. This raises questions about Chinese mortuary practices and more.

Ancient Astronaut Theorists investigate how ancient aliens may have helped to guide and define mankind in the remote past.

Experts question what the God Particle reveals about the origin of our world and whether clues to its significance could have been left by ancient aliens.

Explore the Mary Celestia wreck, discover imperial relics from Iraq, a medieval man's remains and lost artefacts reshaping Native American history.

Explore Seahenge's timber circle, a Ukrainian canoe, ancient remains in a mudslide and a relic from Lake Mead's dry bed.

Wales: Some believe a UFO was shot down by the RAF above South Wales in 2016. Craig and Sarah examine the evidence as they try to discover if it was an extra-terrestrial event.

On 8 April 2011, the FBI declassified decades of top secret government documents for the first time. Here, experts examine the possibility of the end of the world.

Experts examine the possibility of a secret US government facility accused of creating many diseases and biological weapons.

Ian goes over the top when he gets to work on a wild creation.

Experts investigate why religious apparitions appear on seemingly normal objects to seemingly normal people. Is it blind faith or supernatural phenomena.

Paranormal experts and skeptics explore the mysterious world of psychics. Is it a talent, a supernatural gift or a hoax.

A high-rise window washer somehow survives a 50-storey fall and ball-sized ice chunks fall from the sky.

When satellites capture a strange oozing grey mass in the Mississippi countryside, scientist Nick Pollock goes to investigate.

The USS Enterprise became the first ship to receive the Presidential Unit Citation in WWII, following its mission during the bloody Gilbert invasion.

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

Experts investigate an ancient fortress in Peru said to have been built with laser tools. Could it prove that aliens once visited Earth.

Experts comb history for evidence of children with strange abilities and great knowledge. Could these young people have been born from ancient aliens.

In 1947, there was an unprecedented wave of UFO sightings that propelled the UFO phenomenon to the world stage. What were the US Air Force's findings.

For many people, the most credible UFO reports are those raised by law enforcement. We investigate the most significant reports from police records.

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

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

Experts investigate why religious apparitions appear on seemingly normal objects to seemingly normal people. Is it blind faith or supernatural phenomena.

Paranormal experts and skeptics explore the mysterious world of psychics. Is it a talent, a supernatural gift or a hoax.

A high-rise window washer somehow survives a 50-storey fall and ball-sized ice chunks fall from the sky.

When satellites capture a strange oozing grey mass in the Mississippi countryside, scientist Nick Pollock goes to investigate.

The USS Enterprise became the first ship to receive the Presidential Unit Citation in WWII, following its mission during the bloody Gilbert invasion.

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

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

A look at America's Cold War codebreakers charged with unravelling a seemingly uncrackable Soviet code and the uncovering of the Manhattan Project.

Experts investigate an ancient fortress in Peru said to have been built with laser tools. Could it prove that aliens once visited Earth.

Experts comb history for evidence of children with strange abilities and great knowledge. Could these young people have been born from ancient aliens.

In 1947, there was an unprecedented wave of UFO sightings that propelled the UFO phenomenon to the world stage. What were the US Air Force's findings.

For many people, the most credible UFO reports are those raised by law enforcement. We investigate the most significant reports from police records.

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

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

Experts investigate why religious apparitions appear on seemingly normal objects to seemingly normal people. Is it blind faith or supernatural phenomena.

Paranormal experts and skeptics explore the mysterious world of psychics. Is it a talent, a supernatural gift or a hoax.

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.

What happens when people take their numerophobia too seriously? Experts investigate why certain numbers incite fear and panic in people.

Believers and skeptics debate the origins and meanings of the mysterious formations known as crop circles.

Residents of a Texas town report strange lights in the night sky.

Florida's vast Everglades have been invaded by up to 300,000 giant pythons. A group of military veterans are battling to rid paradise of these monsters.

Follow the events of 1944, as the USS Enterprise and the Carrier Task Force push through the Pacific, hammering the enemy bases at Kwajalein and Truk Lagoon.

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.

Experts investigate reports of strange bronze flying ships spotted during the Black Death. Could aliens have brought deadly disease to Earth.

Across the world, there are stories of treasures that have been lost for centuries. Could these ancient relics have been hidden by extraterrestrials.

Between 1981 and 2011, cameras on NASA space shuttles have picked up many images of UFOs that experts still struggle to explain.

While many UFO sightings occur in rural locations with only a single eyewitness, there have been sightings over cities witnessed by hundreds.

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

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 happens when people take their numerophobia too seriously? Experts investigate why certain numbers incite fear and panic in people.

Believers and skeptics debate the origins and meanings of the mysterious formations known as crop circles.

Residents of a Texas town report strange lights in the night sky.

Florida's vast Everglades have been invaded by up to 300,000 giant pythons. A group of military veterans are battling to rid paradise of these monsters.

Follow the events of 1944, as the USS Enterprise and the Carrier Task Force push through the Pacific, hammering the enemy bases at Kwajalein and Truk Lagoon.

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.

How will the new Cold War, involving the US, Russia, the UK and China, play out? Will trade and cyber warfare be the worst of it or is military war inevitable.

Temples of Doom: From the terrifying Tower of London to a hotel of horrors, discover the dark secrets hidden within these foreboding fortresses.

Experts investigate reports of strange bronze flying ships spotted during the Black Death. Could aliens have brought deadly disease to Earth.

Across the world, there are stories of treasures that have been lost for centuries. Could these ancient relics have been hidden by extraterrestrials.

Between 1981 and 2011, cameras on NASA space shuttles have picked up many images of UFOs that experts still struggle to explain.

While many UFO sightings occur in rural locations with only a single eyewitness, there have been sightings over cities witnessed by hundreds.

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

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 happens when people take their numerophobia too seriously? Experts investigate why certain numbers incite fear and panic in people.

Believers and skeptics debate the origins and meanings of the mysterious formations known as crop circles.

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

Experts investigate whether centuries-old paintings of aliens and UFOs are artistic renderings of real sightings, a coded message for humankind, or just a coincidence.

Experts investigate if a series of house fires across the UK are linked to an allegedly cursed portrait.

A look at a mysterious medieval manuscript and Egyptian mummies containing cocaine from Peru.

Satellites reveal a series of strange pits in central China. What are they and what is their connection to some of the most pivotal events in the country's history.

While the Allies storm France, American forces hit the Marianas Islands and the Enterprise supports one of the most deadly battles of the Pacific War.

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.

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

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.

The New Frontier: With science closer than ever to proving that life once lived on Mars, is there a chance that something still exists there.

With light from distant stars taking millions of years to reach us, how long might it take for alien life to answer any communication sent into space.

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

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

Experts investigate whether centuries-old paintings of aliens and UFOs are artistic renderings of real sightings, a coded message for humankind, or just a coincidence.

Experts investigate if a series of house fires across the UK are linked to an allegedly cursed portrait.

A look at a mysterious medieval manuscript and Egyptian mummies containing cocaine from Peru.

Satellites reveal a series of strange pits in central China. What are they and what is their connection to some of the most pivotal events in the country's history.

While the Allies storm France, American forces hit the Marianas Islands and the Enterprise supports one of the most deadly battles of the Pacific War.

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.

Artifacts like glass shards and a writing slate from the tragic Donner Party of 1846 have been recently uncovered in the Sierra Nevada.

Constantine the Great: 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.