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

Insects and rodents swarm supermarkets, but some food lasts forever. An unusual paint ingredient in Da Vinci's The Last Supper seals its fate.

Decode the mysterious Arizona desert cypher, discover the lair of the war elephant and beware the zombie village.

A team of experts tests the deadliest weapons upgrades across the history of warfare, including the Scorpio, the long sword and Henry's rifle.

Discover some of the combat ships that played key parts in river warfare, from Harriet Tubman's successful gunboat to the high-speed PBRs of Vietnam.

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

Experts investigate the 'greys' - mysterious beings with big heads and eyes found carved into rocks. Who are these strange figures and what inspired them.

Experts scrutinise the engineering behind the Egyptians' Sphinx and pyramids. Could this advanced civilisation have received extra-terrestrial help.

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.

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

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

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

Insects and rodents swarm supermarkets, but some food lasts forever. An unusual paint ingredient in Da Vinci's The Last Supper seals its fate.

Decode the mysterious Arizona desert cypher, discover the lair of the war elephant and beware the zombie village.

A team of experts tests the deadliest weapons upgrades across the history of warfare, including the Scorpio, the long sword and Henry's rifle.

Discover some of the combat ships that played key parts in river warfare, from Harriet Tubman's successful gunboat to the high-speed PBRs of Vietnam.

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

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

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

Experts investigate the 'greys' - mysterious beings with big heads and eyes found carved into rocks. Who are these strange figures and what inspired them.

Experts scrutinise the engineering behind the Egyptians' Sphinx and pyramids. Could this advanced civilisation have received extra-terrestrial help.

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.

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

Did our ancestors believe they were cursed? Professor Alice Roberts explores historic cataclysmic events such as wars and floods to dispel the myths.

The pressure is on for both shops when Mike sells a Willys Jeep to custom car wizard James West, with the price determined by the winner of a drag race.

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

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

A massive force of water threatens to destroy everything, from famous paintings to whole cities. The fate of the Sydney Opera House looks bleak.

Witness unexplained shapes in the deserts of Genghis Khan, see the mystery fleet of ice planes at the end of the Earth and look down at Kim Jong Un's terror factory from space.

A team of experts explore the weapons used to recklessly attack civilian populations, from the brutal trebuchet to the devastating atomic bomb.

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

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

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

Alien Origins: The compelling series returns to examine more eerie reports of UFOs. Can it determine where in the universe such strange flying crafts could be coming from.

Human Harvest: A look at frightening reports of alleged alien abduction, including cases in which abductees claim to have been subjected to torturous medical experiments.

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.

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.

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

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

A massive force of water threatens to destroy everything, from famous paintings to whole cities. The fate of the Sydney Opera House looks bleak.

Witness unexplained shapes in the deserts of Genghis Khan, see the mystery fleet of ice planes at the end of the Earth and look down at Kim Jong Un's terror factory from space.

A team of experts explore the weapons used to recklessly attack civilian populations, from the brutal trebuchet to the devastating atomic bomb.

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

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.

Undercover agents employ daring smokescreens in the service of executing a greater purpose.

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

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

Alien Origins: The compelling series returns to examine more eerie reports of UFOs. Can it determine where in the universe such strange flying crafts could be coming from.

Human Harvest: A look at frightening reports of alleged alien abduction, including cases in which abductees claim to have been subjected to torturous medical experiments.

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.

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.

Did our ancestors believe they were cursed? Professor Alice Roberts explores historic cataclysmic events such as wars and floods to dispel the myths.

Rust Valley rivals face off in the Shop Truck Challenge, while Mike struggles to restore a 1971 Chevy Blazer for a wedding day surprise.

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

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

Uncover the truth behind some of history's most mysterious sinkings, from a sunken World War I cruiser to a British Destroyer from the Falklands War.

Speed is always vital in naval combat, so buckle up and examine maritime warfare's fastest and most furious vessels of the last 150 years.

From the broadside cannons of 16th-century warships to thermonuclear warheads aboard Cold War subs, the naval arms race continues to evolve at a rapid pace.

Rob visits the village of Wymondham, where in 1549, a dispute over landownership and sheep grazing sparked a violent rebellion by peasants.

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.

France: Frenchman Fred Sirieix joins Al Murray to break down what really happened during the Napoleonic wars. Did Britain really win the battle of Waterloo.

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

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

Witness the truth behind the Ancient Egyptian superpower we know today as experts dive into the history of their iconic monuments and strong leaders.

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

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

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

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

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.

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.

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

In 1941, Germany launched Operation Barbarossa, a savage attack on the Soviet Union. Witness Hitler's dream to conquer Moscow through newly colourised film.

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

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

How did a Frenchman living in the 16th century predict so many modern-day disasters? This special explores how one person could see into the future.

The Racial State 1933-1934: President Hindenburg suspends freedom of speech and Hitler comes to power in 1933. The first concentration camps for political opponents are set up.

Uncovering the mystery of an ancient stone object with unique markings and a cat mummy with no cat inside.

Himmler's belief in the theory that the Himalayas were home to the Nazis' Aryan ancestors leads to an SS mission to the mountains.

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

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.

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

Discover some of the combat ships that played key parts in river warfare, from Harriet Tubman's successful gunboat to the high-speed PBRs of Vietnam.

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

Karl and Kevin explore how weapons and armour developed, starting with the 1645 Battle of Naseby during the English Civil War.

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

Win Every War. Germany: Al joins forces with German comedian Henning Wehn to delve deeper into the truth behind some World War II myths.

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

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.

Sacred buildings around the world begin to crumble without humans to maintain them. Clues about the planet's future lie in an abandoned desert town.

Deadly toxins are unleashed upon the world without humans to contain them, turning lakes and rivers into streams of acid.

Explore the fate of crypts, safes, time capsules, personal records and other human relics. Meanwhile, Marine Corps learn to succeed in the wild.

Explore moments, motives and ramifications in war that have shaped recent history, from World War I and "the eleventh day of the eleventh month" to Operation Desert Storm.

Experts investigate the methods that Adolf Hitler and the Nazis used to indoctrinate a peaceful population, turning it into a finely-tuned war machine.

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

Professor Alice Roberts strives to get to the bottom of Elizabeth I's death, using research, medical expertise and dramatic recreation to determine possible reasons.

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

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.

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

A look at an extraordinary display of nearly 900,000 ceramic poppies in the moat. Also, Curator Bridget explores a reminder of the horrors of war.

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

An Air Force medic hears terrifying screams in a hospital, while a US Navy Machinist's Mate hears footsteps while alone in the boiler room of a ship.

Season 3-5: Inspired by monster trucks of the past, Ian builds a custom dirt machine using a 4x4 truck and a vintage Pinto body and turns it loose in the desert.

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.

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

The things that once represented our favourite times of year meet their demise, from Christmas trees and roller coasters, to high-end resorts and cruise ships.

Discover the link between Nazis in New Mexico and a mystery craft in Roswell, explore Australia's underground labyrinthine abyss and decode the cypher of Atomic Island.

The Seeds of Violence 1918-1922: In the wake of the First World War, Adolf Hitler identifies Benito Mussolini as his model and has one ultimate goal: to gain power in Germany.

Veterans and historians tell the story of the Thai-Burma railway and the countless prisoners of war and slave labourers who lost their lives building it.

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

Experts open up NASA and secret government files. Can they find proof of alien contact in the recent or ancient past.

Astronaut Encounters: To this day, NASA denies all UFO accounts and has taken measures to prevent its astronauts from telling their stories. But what are they hiding.

Atmospheric Anomalies: Some experts believe many atmospheric light shows are actually caused by extraterrestrials. If so, do they pose an imminent threat to humanity.

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.

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

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.

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

The things that once represented our favourite times of year meet their demise, from Christmas trees and roller coasters, to high-end resorts and cruise ships.

Discover the link between Nazis in New Mexico and a mystery craft in Roswell, explore Australia's underground labyrinthine abyss and decode the cypher of Atomic Island.

The Seeds of Violence 1918-1922: In the wake of the First World War, Adolf Hitler identifies Benito Mussolini as his model and has one ultimate goal: to gain power in Germany.

Veterans and historians tell the story of the Thai-Burma railway and the countless prisoners of war and slave labourers who lost their lives building it.

Five Bronze Age bodies found in a Kent pit. One old woman is posed pointing at something. The team investigates what and why.

Uncover some of the world's most renowned encryptions, revealing how they were decoded, the minds who cracked them and the secrets they masked.

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

Experts open up NASA and secret government files. Can they find proof of alien contact in the recent or ancient past.

Astronaut Encounters: To this day, NASA denies all UFO accounts and has taken measures to prevent its astronauts from telling their stories. But what are they hiding.

Atmospheric Anomalies: Some experts believe many atmospheric light shows are actually caused by extraterrestrials. If so, do they pose an imminent threat to humanity.

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.

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

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

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

A Rust Valley road trip steers Mike into the danger zone with an ultimatum from Connor: buy another car and Connor will blow up one from the Field of Dreams.

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

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

The most important planes in history are grounded with no humans around to fly them, including Air Force One, which suffers an explosive malfunction.

Check out America's 1500 feet tall atomic tower, uncover the lost village of the damned and embark on a hunt for dinosaur fossils. from outer space.

Deceit and Delusion 1923-1928: Hitler appears to be eliminated after his failed putsch in 1923. Discover how the Nazi movement used democracy's tolerance in Germany to come back.

From the trench to the home front hospital, a medical historian retraces the train journey made by wounded soldiers during World War I.

Ancient alien experts investigate the mysterious and fearsome Norse Gods. Were they divine? Or could the all-powerful Vikings have been guided by aliens.

Experts explore the similarities between huge pyramids across the world. Could extraterrestrials have influenced their construction and design.

Alien Apocalypse: If extraterrestrials visited Earth would they enlighten us or destroy us? Experts examine the possibility of a doomsday orchestrated by an alien enemy.

Top Ten Military Encounters: A fascinating and shocking countdown of the top ten military encounters between Earth's armed forces and UFOs.

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

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

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

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

The most important planes in history are grounded with no humans around to fly them, including Air Force One, which suffers an explosive malfunction.

Check out America's 1500 feet tall atomic tower, uncover the lost village of the damned and embark on a hunt for dinosaur fossils. from outer space.

Deceit and Delusion 1923-1928: Hitler appears to be eliminated after his failed putsch in 1923. Discover how the Nazi movement used democracy's tolerance in Germany to come back.

From the trench to the home front hospital, a medical historian retraces the train journey made by wounded soldiers during World War I.

From 1969 to 1973, US forces bomb Cambodia and the country falls into a brutal form of communism. Did the US' involvement pave the way for Pol Pot's regime.

Posing as a drug dealer, undercover informant Tony Tait infiltrates the secret biker club to take down leader Sonny Barger and meth cook Kenny Owens.

Ancient alien experts investigate the mysterious and fearsome Norse Gods. Were they divine? Or could the all-powerful Vikings have been guided by aliens.

Experts explore the similarities between huge pyramids across the world. Could extraterrestrials have influenced their construction and design.

Alien Apocalypse: If extraterrestrials visited Earth would they enlighten us or destroy us? Experts examine the possibility of a doomsday orchestrated by an alien enemy.

Top Ten Military Encounters: A fascinating and shocking countdown of the top ten military encounters between Earth's armed forces and UFOs.

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

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

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

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.

Rust Valley's competing shops get ready to face off at the annual Hit-to-Pass race. The cost of Avery's Deuce-and-a-Half music truck spirals out of control.

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

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

Gas leaks turn suburbs into infernos and high-rise apartments crumble to the earth in an ominous look at the fate that awaits our homes post-apocalypse.

Mysterious satellite images reveal China's hidden terror camps and provide access to America's top secret apocalypse pyramid.

Democracy Without Democrats 1929-1933: A protest turns into a racist and anti-Jewish movement during the 1920s and the NSDAP use emotions to gain the loyalty of the people.

The story of the Great Locomotive Chase - an attempt by Northern spies to steal steam locomotive The General during the American Civil War.

A look at the controversial ancient alien theories of Erich von Däniken, whose books have sold over 65 million copies worldwide.

Ancient astronaut theorists hunt for evidence linking Bigfoot to alien species from the distant past. Could the ape-like giant be an extraterrestrial.

Alien Skies: From mid-air abductions to near-disasters caused by unseen enemies, experts examine if we are alone in the skies over Earth.

The Next Wave: A fascinating look at the mounting evidence that suggests UFO waves are able to penetrate the world's most closely guarded airspace at will.

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

The Tower of London opens up for an access all areas look at one of the most incredible historical sites in the world.

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

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

Gas leaks turn suburbs into infernos and high-rise apartments crumble to the earth in an ominous look at the fate that awaits our homes post-apocalypse.

Mysterious satellite images reveal China's hidden terror camps and provide access to America's top secret apocalypse pyramid.

Democracy Without Democrats 1929-1933: A protest turns into a racist and anti-Jewish movement during the 1920s and the NSDAP use emotions to gain the loyalty of the people.

The story of the Great Locomotive Chase - an attempt by Northern spies to steal steam locomotive The General during the American Civil War.

A Swiss fisherman uncovers ancient Celtic relics in Lake Neuchatel, hinting at a violent Iron Age battle around 225 BCE.

Rebellion And Betrayal: 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.

A look at the controversial ancient alien theories of Erich von Däniken, whose books have sold over 65 million copies worldwide.

Ancient astronaut theorists hunt for evidence linking Bigfoot to alien species from the distant past. Could the ape-like giant be an extraterrestrial.

Alien Skies: From mid-air abductions to near-disasters caused by unseen enemies, experts examine if we are alone in the skies over Earth.

The Next Wave: A fascinating look at the mounting evidence that suggests UFO waves are able to penetrate the world's most closely guarded airspace at will.

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

The Tower of London opens up for an access all areas look at one of the most incredible historical sites in the world.

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

The Cecil Hotel in LA has earned a notorious reputation for death and violence. Experts investigate why it has become a magnet for ghosts and serial killers.

As the auto shops of Rust Valley battle it out at the high-impact Hit to Pass drag race, an accusation of cheating causes chaos to erupt.

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

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

A look at what could happen to the world underground, as minerals grow unchecked in a mine. Back on land, 400 million animals run wild in a town.

Satellites capture unusual images including markings in the desert, while a strange symbol could be a portal into a lost South American civilisation.

The Racial State 1933-1934: President Hindenburg suspends freedom of speech and Hitler comes to power in 1933. The first concentration camps for political opponents are set up.

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

Could ancient rulers have had otherworldly links? Experts examine whether history's most powerful leaders were 'chosen' and guided by aliens.

Ancient astronaut experts believe the minds of Einstein and Galileo were superhuman. Could these historical geniuses have had extraterrestrial connections.

Signs of Abduction: From loss of time and bizarre hazy memories, to terrifying accounts of alien surgery, these are the hidden signs of alien abduction.

Antigravity: Experts discuss the possibility of advanced alien technology that could allow UFOs to fly at blinding speed or hover effortlessly a few feet above the ground.

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.

A new recruit joins the team and begins his career as a Beefeater with some testing exams. The Chief Curator reveals the history of Anne Boleyn within the walls.

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

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

A look at what could happen to the world underground, as minerals grow unchecked in a mine. Back on land, 400 million animals run wild in a town.

Satellites capture unusual images including markings in the desert, while a strange symbol could be a portal into a lost South American civilisation.

The Racial State 1933-1934: President Hindenburg suspends freedom of speech and Hitler comes to power in 1933. The first concentration camps for political opponents are set up.

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

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

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

Could ancient rulers have had otherworldly links? Experts examine whether history's most powerful leaders were 'chosen' and guided by aliens.

Ancient astronaut experts believe the minds of Einstein and Galileo were superhuman. Could these historical geniuses have had extraterrestrial connections.

Signs of Abduction: From loss of time and bizarre hazy memories, to terrifying accounts of alien surgery, these are the hidden signs of alien abduction.

Antigravity: Experts discuss the possibility of advanced alien technology that could allow UFOs to fly at blinding speed or hover effortlessly a few feet above the ground.

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.

A new recruit joins the team and begins his career as a Beefeater with some testing exams. The Chief Curator reveals the history of Anne Boleyn within the walls.

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

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

Mike and Avery embark on a cross-country road trip, which is interrupted by an unexpected call from home. JF has more than just a 1955 GMC truck to restore.

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

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.

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

Satellites capture startling images of a structure in North Korea that may be sinister evidence of a looming nuclear threat.

Hidden In Plain Sight 1935-1938: In 1934, Hitler's government is firmly in the saddle. Most Germans support Hitler's anti-Jewish policy and the regime's terror soon escalates.

Learn how Lawrence of Arabia used guerilla warfare against the Ottoman Empire's railways. Also, what secrets lie under New York's Grand Central Station.

Experts investigate mysterious relics that have been revered by cultures for millennia. Could these sacred items truly hold divine or otherworldly power.

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

UFO Metal: Nations all over the world are rumoured to have found metal debris from UFO crashes. Join the investigation into the alleged wreckages of otherworldly crafts.

Triangle Terror: For years, the flying saucer has been synonymous with UFO terror. But is it still the spacecraft that frightens us the most? Or has fear taken a new shape.

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

A look at an extraordinary display of nearly 900,000 ceramic poppies in the moat. Also, Curator Bridget explores a reminder of the horrors of war.

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

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.

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

Satellites capture startling images of a structure in North Korea that may be sinister evidence of a looming nuclear threat.

Hidden In Plain Sight 1935-1938: In 1934, Hitler's government is firmly in the saddle. Most Germans support Hitler's anti-Jewish policy and the regime's terror soon escalates.

Learn how Lawrence of Arabia used guerilla warfare against the Ottoman Empire's railways. Also, what secrets lie under New York's Grand Central Station.

When millions over the world vanish, a biblical prophecy known as the Rapture will be fulfilled. Are there signs of the prediction actually happening.

Stalin's gruesome trials to create a hybrid human-ape super army and how the CIA uncovered a secret Soviet island devoted to developing deadly bioweapons.

Experts investigate mysterious relics that have been revered by cultures for millennia. Could these sacred items truly hold divine or otherworldly power.

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

UFO Metal: Nations all over the world are rumoured to have found metal debris from UFO crashes. Join the investigation into the alleged wreckages of otherworldly crafts.

Triangle Terror: For years, the flying saucer has been synonymous with UFO terror. But is it still the spacecraft that frightens us the most? Or has fear taken a new shape.

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

A look at an extraordinary display of nearly 900,000 ceramic poppies in the moat. Also, Curator Bridget explores a reminder of the horrors of war.

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

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

Mike overhauls a 1955 Belair Wagon in hopes of turning a quick profit, while Avery takes on an ambitious restoration. Also, Mike's betting streak continues.

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

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

Veterans and historians tell the story of the Thai-Burma railway and the countless prisoners of war and slave labourers who lost their lives building it.

The story of the Great Locomotive Chase - an attempt by Northern spies to steal steam locomotive The General during the American Civil War.

From the trench to the home front hospital, a medical historian retraces the train journey made by wounded soldiers during World War I.

The Tower of London opens up for an access all areas look at one of the most incredible historical sites in the world.

A new recruit joins the team and begins his career as a Beefeater with some testing exams. The Chief Curator reveals the history of Anne Boleyn within the walls.

Win Every War. The Romans: Bruno Tonioli joins Al to look at key battle tactics during the Roman Invasion back in AD 43.

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

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

During WWII, the French Resistance seeks aid from SOE. Led by Vera Atkins, Odette Sansom and Noor Inayat Khan fight the Nazis, risking it all for victory.

Atlantis, the legendary continent that sank. As the Nazis rose to power, Himmler and the SS were convinced Atlantis existed. Season premiere.

An elite force of Norwegian resistance fighters return to their invaded homeland to carry out a daring mission.

Idolised in Norse mythology, Thor protects the planet from evil threats. And today, new discoveries are helping us to uncover the hidden truth behind the legend.

His epic battles with Grendel and his mother have made Beowulf the Viking world's most famous warrior. But could this mythological hero have been based on a real person.

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

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