Ian takes a youthful approach to an old but precious project.

How did the great imperial Chinese dynasties impact modern day China? Explore the origins of the Silk Road and what these dynasties left behind.

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

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

The Messerschmitt 262 was the brainchild of genius designer Willy Messerschmitt and it became the first combat jet in history.

The Leopard 2 is probably the best all-around Main Battle Tank today, combining great mobility, a superior gun and excellent protection.

Soviet troops enter Berlin and begin to carry out their own terrible retribution against the German people. A look from the Russian perspective.

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

The team search for artefacts from the country's first superhighway - the Bridgewater Canal.

Alice studies the history of Canterbury, learning the true horror of the Black Death and exploring the iconic cathedral.

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

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

Australia's worst aviation accident happened in 1943 when 40 crew died in a B-17 bomber crash.

In 1944, two Wellington bombers collided in mid-air over Northants. Garth Barnard investigates why 13 young trainees perished.

Alice is in Lincoln, getting to grips with life in medieval England. She visits the magnificent cathedral that was once the tallest building in the world.

Alice heads to London to attempt to make sense of the world-changing events during the short but eventful Restoration period.

When a mysterious circular stone structure is discovered in Scotland, experts investigate whether it's the fabled Round Table of King Arthur.

US: Ross Kemp heads to New York, discovering the connection between USA and Britain in the rise of the mafia - as well as learning about the infamous Kray twins.

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.

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

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

Examine some of the most notable catastrophes in history, from the Hindenburg disaster to the Wall Street Crash and China's Cultural Revolution.

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

Australia's worst aviation accident happened in 1943 when 40 crew died in a B-17 bomber crash.

In 1944, two Wellington bombers collided in mid-air over Northants. Garth Barnard investigates why 13 young trainees perished.

The need for expression goes to the core of humanity. Take a trip from communication's origins to the creation of the first alphabet and the earliest newspaper.

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

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

The F-16 and MiG-29, born rivals of the skies, embody opposing design ideals: US tech-driven agility versus Soviet rugged aerodynamics.

We examine how the battleship began the 20th century as a dominant force, but then saw its weaknesses exploited mercilessly in the World Wars.

A look from the Russian perspective at the Red Army's assault on Japanese-occupied Manchuria, which fell on the same day a second nuclear attack hit Japan.

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

Uncovering the stories behind a Yorkshire garrison's stables and the horse the Germans could not kill.

Alice explores the story of Stewart Britain by visiting the home of the Scottish royals who eventually took the English throne in 1603 and created Great Britain.

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

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

Garth Barnard fact-finds to determine the cause of a terrible accident in Nebraska in 1944, when a plane crashed during a violent storm.

Controversial royal Prince George perished in a plane crash in 1942. Was a pilot error or sabotage to blame.

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

In Portsmouth, Alice Roberts learns about Nelson's dark side, the heat of the battle at Trafalgar, the role of the Navy in the British Empire, and more.

Experts investigate tunnels rumoured to be the hiding place of lost royal treasure, they find evidence of human sacrifice for Viking god Odin.

Rise of the New Dons: Follow the conflict between the families' old guard and a new generation of younger, American-born mobsters willing to defy their authority.

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

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

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

Fish remains found near an angry Sumatran volcano could suggest a new human migration route and a collapsed kingdom in Turkey gets discovered.

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

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.

Ian shakes things up by taking on a custom vintage vehicle project for a Hollywood picture car coordinator.

Visit the plastic bottle village in Panama, discover floating boats in Greece, take a journey to Chernobyl and investigate the impact of the Centralia mine fire in Pennsylvania.

Troy's grandsons report strange bites on their legs while swimming. Concerned, Troy investigates, enlisting the help of his friend, to track down the culprit.

Strange markings could be a coded message with a plot to overthrow the Queen of England and a lake with healing powers holds clues to life on Mars.

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

A chronological telling of the dramatic D-Day story, focusing on the vessels that made the landings possible.

Count down the top ten mysteries of the deep, from sunken continents to supposed proof of the lost city of Atlantis.

Explore whether the Gods of Greece including Zeus, Apollo and Poseidon, were actually extra-terrestrial visitors to Earth.

There is no safe place. Every day, all around the world, in the most ordinary places, regular people are spotting UFOs.

Alice explores the stories of England's 'Golden Age', from Sir Francis Drake to the Spanish Armada, piracy, theft, and the slave trade.

Hugh and the team attempt to uncover a Roman fort, connected to Hadrian's Wall, that's buried beneath the back gardens of Benwell in Newcastle.

Visit the plastic bottle village in Panama, discover floating boats in Greece, take a journey to Chernobyl and investigate the impact of the Centralia mine fire in Pennsylvania.

Troy's grandsons report strange bites on their legs while swimming. Concerned, Troy investigates, enlisting the help of his friend, to track down the culprit.

Strange markings could be a coded message with a plot to overthrow the Queen of England and a lake with healing powers holds clues to life on Mars.

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

A chronological telling of the dramatic D-Day story, focusing on the vessels that made the landings possible.

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

Jeff MacKinnon's team battles thick kelp, brutal currents and a looming storm while searching Scatarie Island's coast.

Count down the top ten mysteries of the deep, from sunken continents to supposed proof of the lost city of Atlantis.

Explore whether the Gods of Greece including Zeus, Apollo and Poseidon, were actually extra-terrestrial visitors to Earth.

There is no safe place. Every day, all around the world, in the most ordinary places, regular people are spotting UFOs.

Alice explores the stories of England's 'Golden Age', from Sir Francis Drake to the Spanish Armada, piracy, theft, and the slave trade.

Hugh and the team attempt to uncover a Roman fort, connected to Hadrian's Wall, that's buried beneath the back gardens of Benwell in Newcastle.

Observe the daily life of a garbage collector in Brazil, visit a cave village in China and take a closer look at the working conditions of a man working in the Egyptian desert.

The Opium Wars, the Taiping Rebellion and the Boxer Rebellion led to western domination over China. How did these momentous events impact on China today.

Check out the Chinese railway that runs through residential buildings, take a tour of a mysterious forest in Poland and explore amazing underground locations around the world.

Troy Landry teams up with a local archeologist and deckhand Pickle to search for remains of an ancient Native American civilization in the Louisiana swamps.

A mysterious structure in Africa that resembles Stonehenge is said to be the resting place of a mythical giant.

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.

Looking at early metal warships, and how HMS Rattler's screw propeller in 1845 would lead to the revolutionary HMS Dreadnought in the 20th Century.

In the 21st century, UFOs have gone from fringe science to mainstream obsession. Are we getting closer to understanding the strange events in the sky.

For millennia, people have believed that everyday objects can possess hidden energy. These talismans are seen to provide protection and good fortune.

When your day job involves the oversight of missile silos, nuclear facilities or a military base, the last complication you want is a close encounter with a UFO.

Alice Roberts explores Glasgow's age of steam, from lethal diseases and industrial injury to genteel tea rooms.

Hugh and the team attempt to uncover a Viking burial ground hidden beneath Masham in North Yorkshire.

Check out the Chinese railway that runs through residential buildings, take a tour of a mysterious forest in Poland and explore amazing underground locations around the world.

Troy Landry teams up with a local archeologist and deckhand Pickle to search for remains of an ancient Native American civilization in the Louisiana swamps.

A mysterious structure in Africa that resembles Stonehenge is said to be the resting place of a mythical giant.

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.

Looking at early metal warships, and how HMS Rattler's screw propeller in 1845 would lead to the revolutionary HMS Dreadnought in the 20th Century.

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.

A Hells Angel proves his loyalty to the gang by leading a mass slaughter of their enemies - but he soon wrestles with his conscience and seeks an exit.

In the 21st century, UFOs have gone from fringe science to mainstream obsession. Are we getting closer to understanding the strange events in the sky.

For millennia, people have believed that everyday objects can possess hidden energy. These talismans are seen to provide protection and good fortune.

When your day job involves the oversight of missile silos, nuclear facilities or a military base, the last complication you want is a close encounter with a UFO.

Alice Roberts explores Glasgow's age of steam, from lethal diseases and industrial injury to genteel tea rooms.

Hugh and the team attempt to uncover a Viking burial ground hidden beneath Masham in North Yorkshire.

Explore the most dangerous hotel on the planet, check out the world's most fascinating beaches, visit a used car market in Benin and take a tour of a diamond mine in Russia.

Travel from the birth of the Chinese Republic through to today, and explore how the last century has impacted the nation's ambitions as a superpower.

Visit a remarkable prison in South Korea, check out Bangkok's Ghost Tower and get to know the bicep-bulging men at Iceland's Jakabol Gym.

Dr. Beasley is on a mission to uncover lost cemeteries that have been hidden for years beneath the swamp's murky surface.

A mysterious Stonehenge-like structure in Russia might have links to the Nazis. Experts uncover clues to a mega-tsunami with the power to devastate the United States.

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.

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

Did a biblical patriarch receive instructions from 200 angels, and was Egypt's most controversial Pharaoh an extraterrestrial being.

Ancient astronaut theorist Giorgio Tsoukalos takes a look back at some of the most mysterious yet incredible creatures ever investigated.

These are first-hand experiences of the most terrifying kind: stories shot through with mystery, fear and endless questions.

Alice Roberts explores Georgian Edinburgh's finest architecture, the roots of modern Scottishness, and some dark imperial controversies.

Hugh and the team unearth William the Conqueror's lost priory hidden beneath Lenton in Nottingham.

Visit a remarkable prison in South Korea, check out Bangkok's Ghost Tower and get to know the bicep-bulging men at Iceland's Jakabol Gym.

Dr. Beasley is on a mission to uncover lost cemeteries that have been hidden for years beneath the swamp's murky surface.

A mysterious Stonehenge-like structure in Russia might have links to the Nazis. Experts uncover clues to a mega-tsunami with the power to devastate the United States.

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.

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

In Siberia, a 44,000-year-old wolf, perfectly preserved in permafrost, may hold secrets about Ice Age bacteria and ancient microbial life.

Spartacus: As the Roman generals lead their mighty legions into the lands surrounding Italy, none could anticipate the turmoil caused by one bold mercenary - Spartacus.

Did a biblical patriarch receive instructions from 200 angels, and was Egypt's most controversial Pharaoh an extraterrestrial being.

Ancient astronaut theorist Giorgio Tsoukalos takes a look back at some of the most mysterious yet incredible creatures ever investigated.

These are first-hand experiences of the most terrifying kind: stories shot through with mystery, fear and endless questions.

Alice Roberts explores Georgian Edinburgh's finest architecture, the roots of modern Scottishness, and some dark imperial controversies.

Hugh and the team unearth William the Conqueror's lost priory hidden beneath Lenton in Nottingham.

Travel to the richest country on the planet, take a tour of a mind-blowing hotel in Italy, visit a chicken-shaped church in Indonesia and discover the hidden world under Moscow.

Delve into the often-overlooked history of America's next-door neighbour to explore the epic, violent and bloody struggles of Mexican culture and identity.

Investigate the secrets behind the Hadzabe Myth in Tanzania, visit Colorado's incredible Cheyenne Mountain Complex and check out a fascinating abandoned boat in Croatia.

When untold numbers of nutria suddenly vanish from the Louisiana marsh, hunter Ronnie Adams finds his livelihood at risk and calls Troy Landry for help.

When a great white shark is killed, experts suspect a mysterious ocean monster and strange markings in the desert might be a tribute to an ancient spider god.

Follow the events as the USS Enterprise engages in one of the largest sea battles of the war.

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

Home to mysterious stone circles, stories of strange beings and reported sightings, Scotland has always been an epicentre of otherworldly phenomena.

Discover 10 locations around the world that just might be hiding alien bases, from a cavern beneath the ice in Antarctica to a Chinese lake.

Being on an aircraft that comes in close proximity to an object that doesn't appear on radar is a scary experience. Who are they and what do they want.

Alice Roberts explores Manchester's history of protest and rebellion during the Industrial Revolution, from Marx to the Suffragettes.

Hugh and the team attempt to uncover a secret World War military base on the clifftops of South Shields.

Investigate the secrets behind the Hadzabe Myth in Tanzania, visit Colorado's incredible Cheyenne Mountain Complex and check out a fascinating abandoned boat in Croatia.

When untold numbers of nutria suddenly vanish from the Louisiana marsh, hunter Ronnie Adams finds his livelihood at risk and calls Troy Landry for help.

When a great white shark is killed, experts suspect a mysterious ocean monster and strange markings in the desert might be a tribute to an ancient spider god.

Follow the events as the USS Enterprise engages in one of the largest sea battles of the war.

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

Explore how the seeds of Japan's defeat in 1945 were sown a decade earlier with the occupation of Manchuria in China.

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

Discover 10 locations around the world that just might be hiding alien bases, from a cavern beneath the ice in Antarctica to a Chinese lake.

From a meeting in Texas that left onlookers with mysterious injuries to strange cattle mutilations, discover history's terrifying encounters.

Being on an aircraft that comes in close proximity to an object that doesn't appear on radar is a scary experience. Who are they and what do they want.

Alice Roberts explores Manchester's history of protest and rebellion during the Industrial Revolution, from Marx to the Suffragettes.

Hugh and the team attempt to uncover a secret World War military base on the clifftops of South Shields.

Visit the Devil's Pool in Zambia, explore the electrifying Tesla Tower in Moscow's abandoned woods and take a tour of the safest airport in the world.

Explore further a chronicle of conquest with bloody and dramatic consequences littered throughout Mexican history.

Travel to Abu Dhabi's incredible Masdar City, check out the Wieliczka Salt Mine in Poland and visit an Indian village where the houses don't have doors.

Troy gets a call from a local rancher with a huge problem - feral hogs are tearing his property apart. Is the ranch plagued by a curse.

A strange mountain in Egypt sparks an investigation into Cleopatra's gems and the tomb of Alexander the Great.

As the US Navy closes in on Okinawa and the Japanese homeland, the Empire unleashes a hellish weapon. Will the Enterprise survive the Kamikaze.

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

From glyphs in the Peruvian desert to spiral petroglyphs embedded with advanced maths, explore some of the world's most intriguing symbols and codes.

Explore the most devastating disasters ever documented that may have an otherworldly connection, from a flying monster to a deadly virus.

UFO sightings are at an all time high. What makes these mass sightings incredible is also what makes them terrifying, and what might happen next.

Dan ventures behind the battlements of Dover Castle, exploring the underground lairs and a vast network of tunnels that have been used to defend the country for centuries.

Hugh and the team search for a Roman settlement under the back gardens of Florence Road in Maidstone, Kent.

Travel to Abu Dhabi's incredible Masdar City, check out the Wieliczka Salt Mine in Poland and visit an Indian village where the houses don't have doors.

Troy gets a call from a local rancher with a huge problem - feral hogs are tearing his property apart. Is the ranch plagued by a curse.

A strange mountain in Egypt sparks an investigation into Cleopatra's gems and the tomb of Alexander the Great.

As the US Navy closes in on Okinawa and the Japanese homeland, the Empire unleashes a hellish weapon. Will the Enterprise survive the Kamikaze.

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

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

What lies beneath? David Duchovny takes us into the top-secret government bases and the clandestine operations they were built to conceal.

From glyphs in the Peruvian desert to spiral petroglyphs embedded with advanced maths, explore some of the world's most intriguing symbols and codes.

Explore the most devastating disasters ever documented that may have an otherworldly connection, from a flying monster to a deadly virus.

UFO sightings are at an all time high. What makes these mass sightings incredible is also what makes them terrifying, and what might happen next.

Dan ventures behind the battlements of Dover Castle, exploring the underground lairs and a vast network of tunnels that have been used to defend the country for centuries.

Hugh and the team search for a Roman settlement under the back gardens of Florence Road in Maidstone, Kent.

Visit the fascinating Indian retreat where The Beatles meditated, explore a copycat Chinese city and check out a glass factory in Israel.

Dive into the Spanish conquest of Mexico in the 16th century, resulting in 400 years of overlooked history in Latin America.

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

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

A chronological telling of the dramatic D-Day story, focusing on the vessels that made the landings possible.

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

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

Hugh and the team attempt to uncover a Roman fort, connected to Hadrian's Wall, that's buried beneath the back gardens of Benwell in Newcastle.

Hugh and the team unearth William the Conqueror's lost priory hidden beneath Lenton in Nottingham.

Alice explores the stories of England's 'Golden Age', from Sir Francis Drake to the Spanish Armada, piracy, theft, and the slave trade.

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

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

Science reveals new insights into belief and superstition in the land of the Pharaohs, from finding the long-lost 'Land of Punt' to Tutankhamun.

Birth Of A Dynasty: Discover how, for the past few thousand years, this mighty ruler has remained a caricature of his own propaganda.

Written in the Stars: Ex-Rolls Royce engineer Bradley Walsh questions the Pyramids' builders and purpose, seeking answers by visiting them himself.

Riddle of the Sphinx: Bradley journeys through Egypt to uncover the secrets of the Sphinx and explores the mysterious underground Serapeum.

Search for the Boy King: Bradley travels to the tomb of Tutankhamun to unravel the mysteries of the rise and fall of Egypt's most famous royal dynasty.

Colombia: Ross sees just how prevalent cocaine is in Colombia as he joins an army raid, before meeting the son of Gilberto Rodriguez - a founder of the Cali Cartel.

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

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

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

Venture back in time and explore the stories of some of history's most notable leaders, from Sir Winston Churchill to Fidel Castro and Nelson Mandela.

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

Garth Barnard fact-finds to determine the cause of a terrible accident in Nebraska in 1944, when a plane crashed during a violent storm.

Controversial royal Prince George perished in a plane crash in 1942. Was a pilot error or sabotage to blame.

Renaissance painters sought to equal the art of the Egyptians, Greeks and Romans thousands of years earlier. What will future generations make of today's art.

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

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

Looking at early metal warships, and how HMS Rattler's screw propeller in 1845 would lead to the revolutionary HMS Dreadnought in the 20th Century.

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

On the outskirts of Bouerat Harbor in Libya, a small group of British special forces prepare to destroy a crucial German fuel depot.

Hugh and the team attempt to uncover a Viking burial ground hidden beneath Masham in North Yorkshire.

Hugh and the team attempt to uncover a secret World War military base on the clifftops of South Shields.

Alice Roberts explores Glasgow's age of steam, from lethal diseases and industrial injury to genteel tea rooms.

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

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

Journey back in time to understand the brainpower behind Ancient Egypt's revolutionary breakthroughs in every field, from medicine to engineering.

Royal Childhood: Discover how, for the past few thousand years, this mighty ruler has remained a caricature of his own propaganda.

Founded the legend of the most warlike of pharaohs, Thutmose III, who reinvented warfare for millennia to come.

Examine the story of Queen Tiye, who - over 3,000 years ago - surpassed her rivals and inspired a religious revolution that changed Egypt and the world.

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.

The Last Don: Discover how a more aggressive commitment by law enforcement to eradicate the mafia forced the families to get creative in order to stay out of jail.

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

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

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

Heinrich Himmler: An agriculturalist by trade, he went on to lead the SS and tried to escape responsibility at the end of the war. Who was Heinrich Himmler.

The Zodiac Killer Code reveals the desperate bid to crack the crazed codes sent by America's most mysterious serial killer.

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.

The time has come for Ian to leap into one of his biggest ever projects with the intention of helping a friend.

New theories shed light on the world's biggest mysteries, including the unsolved disappearances of aviator Amelia Earhart and hijacker DB Cooper.

A suspicious disappearance in Troy's backyard sends the King of the Swamp deep into the bayou to confront beasts known and unknown.

A ghost ship is found abandoned on a remote island that's home to one of the world's last uncontacted tribes.

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.

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

When the ancient Sumerians built their civilisation, they credited their gods - but were these powerful beings actually extraterrestrial visitors.

Home to mysterious stone circles, stories of strange beings and reported sightings, Scotland has always been an epicentre of otherworldly phenomena.

Sometimes, the mysterious unidentified objects people see in the sky touch down and leave physical evidence behind.

Dan delves into the rich past of the Tower of London, exploring inside the imposing walls that have witnessed some of the most important events in our history.

Hugh and the experts attempt to uncover a lost Roman fort connected to the Antonine Wall, buried beneath the gardens of the quiet streets of Falkirk.

New theories shed light on the world's biggest mysteries, including the unsolved disappearances of aviator Amelia Earhart and hijacker DB Cooper.

A suspicious disappearance in Troy's backyard sends the King of the Swamp deep into the bayou to confront beasts known and unknown.

A ghost ship is found abandoned on a remote island that's home to one of the world's last uncontacted tribes.

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.

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

Skydivers narrowly escape two colliding planes, a father and son drive through a wildfire and more.

Jeff and his team's search for the wrecks of Mary, Joseph and Neptune takes them further into uncharted territory.