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

Iceland's Glacier Tomb: In Russia, 34,000-year-old graves are discovered. Meanwhile, a team attempts to locate a British World War II aeroplane that went missing in Iceland. (S3, ep 5).

B17: The mighty Flying Fortress takes to the air as we examine the background and development of one of WWII's most iconic bombers. (S2, ep 2).

Embark on an eye-opening journey as experts investigate the startling mysteries captured by satellites orbiting the Earth: from hidden worlds to unexplainable natural phenomena. (S4, ep 16).

The Alien Infection: Is our planet prepared for an extraterrestrial invasion of disease? And could past plagues have been brought to Earth by aliens? Experts investigate. (S12, ep 9).

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

Tollund Man: Homicide detective Rod Demery and forensic scientist Turi King investigate an Iron Age victim, so well-preserved that he seems to be peacefully sleeping. (S1, ep 6).

Caernarfon: Dan is in the heart of Snowdonia exploring a Caernarfon Castle - built not only as an impenetrable fortress but also as a lavish royal palace fit for a fairy tale. (S1, ep 4).

Greatest Ships: Discover how the incredible technology behind the ancient Greeks' Trireme war vessels and Roman emperor Caligula's opulent sex ships has defied reinvention. (S1, ep 9).

B17: The mighty Flying Fortress takes to the air as we examine the background and development of one of WWII's most iconic bombers. (S2, ep 2).

Touching The Void: From ghostly voices to vanishing UFOs, experts investigate puzzling and mysterious signal interferences and break down the meanings behind them. (S1, ep 2).

Embark on an eye-opening journey as experts investigate the startling mysteries captured by satellites orbiting the Earth: from hidden worlds to unexplainable natural phenomena. (S4, ep 1).

Experts open previously off-limits files in a bid to answer some of the most mysterious questions surrounding UFOs and extra-terrestrial life. (S1, ep 7).

The Antwerp Diamond Heist: After 27 months of planning, an elite crew of Italian thieves execute their ambitious and intricate plan to make off with more than $100 million. (S1, ep 2).

The Killing of Margo Compton: When Hells Angels are linked to the murder of a woman and her daughters, a detective embarks on an 18-year quest to bring the killers to justice. (S1, ep 3).

Iceland's Glacier Tomb: In Russia, 34,000-year-old graves are discovered. Meanwhile, a team attempts to locate a British World War II aeroplane that went missing in Iceland. (S3, ep 5).

Caesar: Overcoming overwhelming odds while fighting throughout the Mediterranean, Caesar's decisive actions were a success and made him the most powerful man in the world. (S1, ep 2).

The Alien Infection: Is our planet prepared for an extraterrestrial invasion of disease? And could past plagues have been brought to Earth by aliens? Experts investigate. (S12, ep 9).

Caernarfon: Dan is in the heart of Snowdonia exploring a Caernarfon Castle - built not only as an impenetrable fortress but also as a lavish royal palace fit for a fairy tale. (S1, ep 4).

Roman Empire: From luxurious revolving rooms to colossal walls and the technology behind amphitheatres, discover the true power and scale of the Romans' ingenuity. (S1, ep 8).

Experts open previously off-limits files in a bid to answer some of the most mysterious questions surrounding UFOs and extra-terrestrial life. (S1, ep 7).

Touching The Void: From ghostly voices to vanishing UFOs, experts investigate puzzling and mysterious signal interferences and break down the meanings behind them. (S1, ep 2).

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

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

The God Particle: 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. (S6, ep 16).

Falkirk: 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. (S2, ep 1).

Stretton, Staffordshire: In Stretton, Hugh and the team search for prehistoric roundhouses and try to work out when people first made the Staffordshire village their home. (S2, ep 2).

Devizes: Hugh Dennis and a team of archaeologists are in Devizes, searching for a revolutionary 19th-century prison with a unique design. (S2, ep 3).

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

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

Embark on an eye-opening journey as experts investigate the startling mysteries captured by satellites orbiting the Earth: from hidden worlds to unexplainable natural phenomena. (S4, ep 18).

Conquering Heroes: Explore how the Axis Powers' ruthless, brutal occupation and exploitation of other countries contributed to their demise. (S1, ep 3).

Storming Mussolini's Island: It's July 10, 1943 and the Allied Forces have evicted the Axis Powers from North Africa and can finally begin the Italian Campaign. (S1, ep 3).

The Mystery of Terrarosa Gold: Kru chases down a taped conversation with a man claiming to have found Slumach's gold deposit. Taylor attempts to decipher an old map. (S1, ep 5).

Cursed Amethyst: A damned gem, a devilish beast and the downfall of a family for several generations. How long must we suffer for the sins of the past? (S1, ep 6).

Puppy Love: After becoming smitten with an inmate in a dog training program, Toby Dorr uses a dog crate to smuggle her new love out of Lansing Correctional Facility. (S1, ep 9).

War and Conflict: Examine how conflict has reshaped nations and devastated generations. Wars dominate history but the reasons for them starting are constantly disputed. (S1, ep 3).

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

Thor: 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. (S1, ep 8).

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

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

The God Particle: 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. (S6, ep 16).

Thor: 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. (S1, ep 8).

Dover: 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. (S1, ep 1).

Tower of London: 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. (S1, ep 2).

Conquering Heroes: Explore how the Axis Powers' ruthless, brutal occupation and exploitation of other countries contributed to their demise. (S1, ep 3).

Forged by the Gods: Examining otherworldly artefacts as physical evidence of extraterrestrial visits, including a strange metal sphere that defies the laws of physics. (S10, ep 2).

The Mystery of Rudloe Manor: In the countryside of Wiltshire, England lies Rudloe Manor. A quaint manor house? Or epicentre of British UFO research since World War II? (S10, ep 1).

The Alien Architects: Why do many ancient architectural wonders bear similarities despite being built by different civilisations? Could aliens have designed them? (S10, ep 3).

George II - Warring King: George II is known for military exploits, but family conflicts and his father's scars threaten the Hanoverian succession. (S1, ep 2).

Part Two: Through archive footage, see how these radically different characters clashed in a fascinating subplot of World War II. (2 of 2).

The Antwerp Diamond Heist: After 27 months of planning, an elite crew of Italian thieves execute their ambitious and intricate plan to make off with more than $100 million. (S1, ep 2).

Embark on an eye-opening journey as experts investigate the startling mysteries captured by satellites orbiting the Earth: from hidden worlds to unexplainable natural phenomena. (S4, ep 19).

Embark on an eye-opening journey as experts investigate the startling mysteries captured by satellites orbiting the Earth: from hidden worlds to unexplainable natural phenomena. (S4, ep 20).

Embark on an eye-opening journey as experts investigate the startling mysteries captured by satellites orbiting the Earth: from hidden worlds to unexplainable natural phenomena. (S4, ep 1).

Forged by the Gods: Examining otherworldly artefacts as physical evidence of extraterrestrial visits, including a strange metal sphere that defies the laws of physics. (S10, ep 2).

The Mystery of Rudloe Manor: In the countryside of Wiltshire, England lies Rudloe Manor. A quaint manor house? Or epicentre of British UFO research since World War II? (S10, ep 1).

Between September 1940 and November 1941, things intensify as Nazi Germany exert their dominance over Europe. (S1, ep 2).

Beningbrough: Can Hugh and the team find the remains of a vanished building in the gardens of the Georgian stately home Beningbrough Hall? (S2, ep 4).

West Derby: Hugh and the team search for the remains of a Norman motte and bailey castle in the suburb of West Derby and uncover gems in the residents' gardens. (S2, ep 5).

The Alien Architects: Why do many ancient architectural wonders bear similarities despite being built by different civilisations? Could aliens have designed them? (S10, ep 3).

The Battle of Cannae - Hannibal V. Rome: Examine how the strategy of encirclement devised by Hannibal left 50,000 Romans dead on the battlefield of Apulia on August 2, 216 BC. (S1, ep 2).

Catastrophe: Examine some of the most notable catastrophes in history, from the Hindenburg disaster to the Wall Street Crash and China's Cultural Revolution. (S1, ep 2).

Forged by the Gods: Examining otherworldly artefacts as physical evidence of extraterrestrial visits, including a strange metal sphere that defies the laws of physics. (S10, ep 2).

The Mystery of Rudloe Manor: In the countryside of Wiltshire, England lies Rudloe Manor. A quaint manor house? Or epicentre of British UFO research since World War II? (S10, ep 1).

The Alien Architects: Why do many ancient architectural wonders bear similarities despite being built by different civilisations? Could aliens have designed them? (S10, ep 3).

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

Warwick: Dan explores the turbulent history that took place within the well-preserved walls of Warwick Castle, touching on tales of betrayal, bloodshed, murder and financial woe. (S1, ep 3).

Stirling: Stirling has long been one of the most strategically important castles in Britain. Dan Jones examines the rich and savage history of this stronghold. (S1, ep 5).

Warrior Tech: Explore the cutting-edge weapons and defenses that armed the ancient warriors. Who wore the first bulletproof vest? And when was the first 'machine gun' fired? (S1, ep 7).

The Trans-Dimensionals: Could ghosts and angels be visitors from other-worldly realms? A team of ancient alien theorists explores. (S12, ep 11).

Islands of Fire: Could Hawaii's islands have once been inhabited by extraterrestrials? Experts investigate whether its volcanoes provide a portal between space and time. (S12, ep 12).

Antarctic Island Mysteries: A mysterious volcanic island off the coast of Antarctica is explored, while the mummified remains of a teenage girl are found in the Peruvian Andes. (S3, ep 6).

B25: The mighty North American twin delivered the first blow in the fight back against Japan, in one of the most daring and audacious raids of all time. (S2, ep 3).

Embark on an eye-opening journey as experts investigate the startling mysteries captured by satellites orbiting the Earth: from hidden worlds to unexplainable natural phenomena. (S4, ep 17).

The Trans-Dimensionals: Could ghosts and angels be visitors from other-worldly realms? A team of ancient alien theorists explores. (S12, ep 11).

Islands of Fire: Could Hawaii's islands have once been inhabited by extraterrestrials? Experts investigate whether its volcanoes provide a portal between space and time. (S12, ep 12).

Ancient Global Warming: Did our ancestors believe they were cursed? Professor Alice Roberts explores historic cataclysmic events such as wars and floods to dispel the myths. (1 of 5).

Stirling: Stirling has long been one of the most strategically important castles in Britain. Dan Jones examines the rich and savage history of this stronghold. (S1, ep 5).

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

B25: The mighty North American twin delivered the first blow in the fight back against Japan, in one of the most daring and audacious raids of all time. (S2, ep 3).

The Lurking Menace: From ghostly voices to vanishing UFOs, experts investigate puzzling and mysterious signal interferences and break down the meanings behind them. (S1, ep 3).

Journey to an Indian village where men train to become bouncers in the big city. Elsewhere, take a tour of the Chinese settlement where fire erupts from the ground. (S1, ep 1).

An out-of-this-world look at ten of the most fascinating alien encounters ever. (S1, ep 8).

Panzer Pals: Hans Jochaim-Horn breaks into a German army base, steals a tank and smashes through three sets of gates at Schwalmstadt Prison to breakout his friend. (S1, ep 10).

The U-Boat Terror: Inspired by the story of his two cousins that died at sea in WWII, Ross Kemp heads up to Scapa Flow where he finds treasure that could link back to his family. (1 of 4).

Antarctic Island Mysteries: A mysterious volcanic island off the coast of Antarctica is explored, while the mummified remains of a teenage girl are found in the Peruvian Andes. (S3, ep 6).

The Battle of Thermopylae: Journey back to 480 BC, when King Leonidas and his 300 Spartans successfully blocked Xerxes' two-million-strong Persian army at Thermopylae. (S1, ep 3).

The Trans-Dimensionals: Could ghosts and angels be visitors from other-worldly realms? A team of ancient alien theorists explores. (S12, ep 11).

Islands of Fire: Could Hawaii's islands have once been inhabited by extraterrestrials? Experts investigate whether its volcanoes provide a portal between space and time. (S12, ep 12).

Stirling: Stirling has long been one of the most strategically important castles in Britain. Dan Jones examines the rich and savage history of this stronghold. (S1, ep 5).

Greatest Ships: Discover how the incredible technology behind the ancient Greeks' Trireme war vessels and Roman emperor Caligula's opulent sex ships has defied reinvention. (S1, ep 9).

An out-of-this-world look at ten of the most fascinating alien encounters ever. (S1, ep 8).

The Lurking Menace: From ghostly voices to vanishing UFOs, experts investigate puzzling and mysterious signal interferences and break down the meanings behind them. (S1, ep 3).

The Constellation Code: Experts check out structures built to mirror the constellations. Could they have been built as a message to extraterrestrials? (S12, ep 13).

Nuclear Agenda: Ever since the first atomic bomb went off in 1945, UFOs have been spotted at nuclear facilities across the world. Could this signal a threat to mankind? (S12, ep 14).

Forgotten Greenland Ghost Town: Mysterious industrial waste is discovered in an uninhabited part of Greenland. Meanwhile, strange mounds are found deep within the Arctic Circle. (S3, ep 7).

B24: The Liberator proved its worth in WWII over Europe and the Pacific, modeled after the B-17, delivering blows to the Axis. (S2, ep 4).

Embark on an eye-opening journey as experts investigate the startling mysteries captured by satellites orbiting the Earth: from hidden worlds to unexplainable natural phenomena. (S4, ep 18).

The Constellation Code: Experts check out structures built to mirror the constellations. Could they have been built as a message to extraterrestrials? (S12, ep 13).

Nuclear Agenda: Ever since the first atomic bomb went off in 1945, UFOs have been spotted at nuclear facilities across the world. Could this signal a threat to mankind? (S12, ep 14).

Rome's Rise and Fall: Did our ancestors believe they were cursed? Professor Alice Roberts explores historic cataclysmic events through a scientific lens to dispel the myths. (2 of 5).

Carrickfergus: Dan visits one of Northern Ireland's oldest castles, Carrickfergus, to learn more about the tempestuous relationship between Britain and Ireland. (S1, ep 6).

Angkor Wat: The story behind the breath-taking temple complex, which is located in Cambodia and is the largest religious monument in the world.

B24: The Liberator proved its worth in WWII over Europe and the Pacific, modeled after the B-17, delivering blows to the Axis. (S2, ep 4).

The Ghost in the Machine: From ghostly voices to vanishing UFOs, experts investigate puzzling and mysterious signal interferences and break down the meanings behind them. (S1, ep 4).

Visit a luxury survival condo in Kansas, a minefield in Sarajevo and the King Cobra Village in Thailand. Elsewhere, explore the \"fake\" pentagon on the outskirts of Shanghai. (S1, ep 2).

Experts investigate evidence suggesting that aliens have created the means for controlling humanity. They find that the shocking truth might be hidden right inside you. (S1, ep 9).

The Right Tools: Victory in war doesn't just require sound military strategy, vital resources and equipment are also critical. Discover how the Axis powers failed in this regard. (S1, ep 4).

Society: Explore the theme of society and myths that engulf memories of the past. These myths often become woven into the fabric of our society and can pass through generations. (S1, ep 4).

Forgotten Greenland Ghost Town: Mysterious industrial waste is discovered in an uninhabited part of Greenland. Meanwhile, strange mounds are found deep within the Arctic Circle. (S3, ep 7).

Archaeologists investigate the full story of how the most famous Roman leader, Julius Caesar, rose to power and the battle that took him to the brink of defeat. (1 of 2).

The Constellation Code: Experts check out structures built to mirror the constellations. Could they have been built as a message to extraterrestrials? (S12, ep 13).

Nuclear Agenda: Ever since the first atomic bomb went off in 1945, UFOs have been spotted at nuclear facilities across the world. Could this signal a threat to mankind? (S12, ep 14).

Carrickfergus: Dan visits one of Northern Ireland's oldest castles, Carrickfergus, to learn more about the tempestuous relationship between Britain and Ireland. (S1, ep 6).

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

Experts investigate evidence suggesting that aliens have created the means for controlling humanity. They find that the shocking truth might be hidden right inside you. (S1, ep 9).

The Ghost in the Machine: From ghostly voices to vanishing UFOs, experts investigate puzzling and mysterious signal interferences and break down the meanings behind them. (S1, ep 4).

The Alien Mountain: Experts investigate an Italian mountain that's stood witness to inexplicable phenomena for centuries. Could it somehow be attracting alien visitors? (S12, ep 15).

The Secrets of Stonehenge: A DNA study released in 2018 revealed that the original builders of Stonehenge mysteriously vanished - did they head back to a home among the stars? (S12, ep 16).

Abandoned Alpine Fortress: A group of hikers trekking across the Italian Alps stumble upon abandoned military infrastructure. What purpose did these camouflaged buildings serve? (S3, ep 8).

Skyraider: The many variants of this single piston engine fighter bomber helped dominate the air to ground attack role in Vietnam, earning quite a reputation. (S2, ep 5).

Embark on an eye-opening journey as experts investigate the startling mysteries captured by satellites orbiting the Earth: from hidden worlds to unexplainable natural phenomena. (S4, ep 19).

The Alien Mountain: Experts investigate an Italian mountain that's stood witness to inexplicable phenomena for centuries. Could it somehow be attracting alien visitors? (S12, ep 15).

The Secrets of Stonehenge: A DNA study released in 2018 revealed that the original builders of Stonehenge mysteriously vanished - did they head back to a home among the stars? (S12, ep 16).

The Darkest Age: Did our ancestors believe they were cursed? Professor Alice Roberts explores historic cataclysmic events such as wars and floods to dispel the myths. (3 of 5).

Edinburgh: A look at one of Scotland's most popular paid tourist attraction. With a slew of sieges to its name, it is no surprise that the site boasts some formidable defences. (1 of 5).

Hagia Sophia Of Istanbul: Built in 537, this is a walk-through the stunning place of worship located in Istanbul, Turkey.

Skyraider: The many variants of this single piston engine fighter bomber helped dominate the air to ground attack role in Vietnam, earning quite a reputation. (S2, ep 5).

Oblivion Calling: From ghostly voices to vanishing UFOs, experts investigate puzzling and mysterious signal interferences and break down the meanings behind them. (S1, ep 5).

Learn about Togo's traditional religious practices and take a tour of the incredible Danakil Desert in Ethiopia. Plus, visit a city in Georgia where every citizen has a gun. (S1, ep 3).

Could Hitler's crazed quest for world domination have been influenced by aliens? Experts reveal the extraterrestrial secret Hitler may have been hiding and where it is now. (S1, ep 10).

The Sobibor Revolt: During World War II, the Nazi war machine creates specialised death camps. At Sobibor, Poland, a small number of Jews engineer a mass escape. (S2, ep 4).

The Birth of Mickey: Recount the birth of Mickey Mouse, from being created as a pencil sketch to rocketing into untouchable, lasting fame. (S1, ep 1).

Abandoned Alpine Fortress: A group of hikers trekking across the Italian Alps stumble upon abandoned military infrastructure. What purpose did these camouflaged buildings serve? (S3, ep 8).

Zeus: 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. (S1, ep 10).

The Alien Mountain: Experts investigate an Italian mountain that's stood witness to inexplicable phenomena for centuries. Could it somehow be attracting alien visitors? (S12, ep 15).

The Secrets of Stonehenge: A DNA study released in 2018 revealed that the original builders of Stonehenge mysteriously vanished - did they head back to a home among the stars? (S12, ep 16).

Edinburgh: A look at one of Scotland's most popular paid tourist attraction. With a slew of sieges to its name, it is no surprise that the site boasts some formidable defences. (1 of 5).

Angkor Wat: The story behind the breath-taking temple complex, which is located in Cambodia and is the largest religious monument in the world.

Could Hitler's crazed quest for world domination have been influenced by aliens? Experts reveal the extraterrestrial secret Hitler may have been hiding and where it is now. (S1, ep 10).

Oblivion Calling: From ghostly voices to vanishing UFOs, experts investigate puzzling and mysterious signal interferences and break down the meanings behind them. (S1, ep 5).

Telepathy: Could aliens have given our brains incredible untapped abilities? Experts ask whether harnessing these hidden powers could spark the next step in our evolution. (S12, ep 17).

Food of the Gods: Experts question the link between divine substances and extraterrestrials. Could the food of the gods really have been sustaining Earth's alien visitors? (S12, ep 18).

Long Lost Arctic Army Base: A secret military base is discovered a few hundred miles from the North Pole, while a man-made stone formation is found 120-feet below Lake Huron. (S3, ep 9).

Huey: The definitive combat helicopter debuted in Southeast Asia, serving as transport, gunship, smoke ship, command center, MediVac and many other roles. (S2, ep 6).

Embark on an eye-opening journey as experts investigate the startling mysteries captured by satellites orbiting the Earth: from hidden worlds to unexplainable natural phenomena. (S4, ep 20).

Telepathy: Could aliens have given our brains incredible untapped abilities? Experts ask whether harnessing these hidden powers could spark the next step in our evolution. (S12, ep 17).

Food of the Gods: Experts question the link between divine substances and extraterrestrials. Could the food of the gods really have been sustaining Earth's alien visitors? (S12, ep 18).

God's Holy Warriors: Did our ancestors believe they were cursed? Professor Alice Roberts explores historic cataclysmic events such as wars and floods to dispel the myths. (4 of 5).

Cardiff: Dan Jones explores the history of Cardiff castle over more than 2,000 years and reveals how it transformed into a lavish Victorian home. (2 of 5).

Le Louvre: A look at the world's largest art museum, located in Paris, France and the home of the Mona Lisa.

Huey: The definitive combat helicopter debuted in Southeast Asia, serving as transport, gunship, smoke ship, command center, MediVac and many other roles. (S2, ep 6).

Origin Unknown: From ghostly voices to vanishing UFOs, experts investigate puzzling and mysterious signal interferences and break down the meanings behind them. (S1, ep 6).

Visit some of the world's most unusual houses, explore the Bangladeshi city with the largest number of cycle rickshaws and travel to the richest village in all of China. (S1, ep 4).

Experts unseal the truth about the potential aliens living and working among us. Who has come in peace? And who has a more sinister motive in mind? (S1, ep 11).

Part Two: Through archive footage, see how these radically different characters clashed in a fascinating subplot of World War II. (2 of 2).

Mystifying Cursed Objects: Ancient cultures around the world have aroused fascination and provoked fear with curses and objects used to conjure them. (S1, ep 8).

Long Lost Arctic Army Base: A secret military base is discovered a few hundred miles from the North Pole, while a man-made stone formation is found 120-feet below Lake Huron. (S3, ep 9).

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

Telepathy: Could aliens have given our brains incredible untapped abilities? Experts ask whether harnessing these hidden powers could spark the next step in our evolution. (S12, ep 17).

Food of the Gods: Experts question the link between divine substances and extraterrestrials. Could the food of the gods really have been sustaining Earth's alien visitors? (S12, ep 18).

Cardiff: Dan Jones explores the history of Cardiff castle over more than 2,000 years and reveals how it transformed into a lavish Victorian home. (2 of 5).

Hagia Sophia Of Istanbul: Built in 537, this is a walk-through the stunning place of worship located in Istanbul, Turkey.

Experts unseal the truth about the potential aliens living and working among us. Who has come in peace? And who has a more sinister motive in mind? (S1, ep 11).

Origin Unknown: From ghostly voices to vanishing UFOs, experts investigate puzzling and mysterious signal interferences and break down the meanings behind them. (S1, ep 6).

Human Hieroglyphs: Tattoos, piercings and body modifications are big business. But could our desire for these changes stem from a profound link to our ancestors? (S12, ep 19).

The Mystery of Skinwalker: Nestled in Utah lies a ranch some believe to be a hotbed of strange phenomena. Is it all connected to an alien entity known as the Skinwalker? (S12, ep 21).

WWII Warship Wreckage: A giant naval vessel is located on the bottom of the Norwegian Sea, while an ancient reptile-like creature is found in Canada. (S3, ep 10).

Avenger: Explore classic and underrated aircraft, from WWII fighters to the Screaming Eagles F4, showcasing aviation's evolving history. (S3, ep 1).

Embark on an eye-opening journey as experts investigate the startling mysteries captured by satellites orbiting the Earth: from hidden worlds to unexplainable natural phenomena. (S4, ep 1).

Aliens And The Lost Ark: Experts on the extraterrestrial investigate the possibility of the religious relic being an alien artefact. (S1, ep 7).

Human Hieroglyphs: Tattoos, piercings and body modifications are big business. But could our desire for these changes stem from a profound link to our ancestors? (S12, ep 19).

Medieval Mystery: Did our ancestors believe they were cursed? Professor Alice Roberts explores historic cataclysmic events such as wars and floods to dispel the myths. (5 of 5).

York: Dan explores the history of York's castle, from the Viking Jorvik and the Normans, to the dark days of the anti-Jewish pogrom and the imprisonment of the Knights Templar. (3 of 5).

Taj Mahal: A walk through the iconic mausoleum complex, located in India and commissioned in 1632 by the Mughal emperor Shah Jahan to house the remains of his beloved wife.

Avenger: Explore classic and underrated aircraft, from WWII fighters to the Screaming Eagles F4, showcasing aviation's evolving history. (S3, ep 1).

Journey to an Indian village where men train to become bouncers in the big city. Elsewhere, take a tour of the Chinese settlement where fire erupts from the ground. (S1, ep 1).

Meet the man who paints cliffs bright green and explore Zimbabwe's abandoned places. Plus, visit India's largest vegetable market and a truly unique village in China. (S1, ep 5).

Experts investigate the mystery of the Solway Firth Spaceman - a spacesuit-clad figure who strangely appeared in a photograph taken in Cumbria. (S1, ep 12).

The Pierre Hotel Robbery: Two skilled thieves go after New York's Pierre Hotel. The team take over the hotel, getting into the lobby vault and hundreds of safe deposit boxes. (S1, ep 3).

The Brotherhood Is a Lie: Charles Peewee Goldsmith wanted nothing more than to be a Hells Angel. He fought to become a president, only for the Angels to turn on him. (S1, ep 4).

WWII Warship Wreckage: A giant naval vessel is located on the bottom of the Norwegian Sea, while an ancient reptile-like creature is found in Canada. (S3, ep 10).

Cleopatra: The enigmatic Egyptian Queen's untold story is one of a ruthless genius, doing anything necessary to cling to power in the face of an ever-expanding Roman Empire. (S1, ep 3).

Human Hieroglyphs: Tattoos, piercings and body modifications are big business. But could our desire for these changes stem from a profound link to our ancestors? (S12, ep 19).

York: Dan explores the history of York's castle, from the Viking Jorvik and the Normans, to the dark days of the anti-Jewish pogrom and the imprisonment of the Knights Templar. (3 of 5).

Le Louvre: A look at the world's largest art museum, located in Paris, France and the home of the Mona Lisa.

Experts investigate the mystery of the Solway Firth Spaceman - a spacesuit-clad figure who strangely appeared in a photograph taken in Cumbria. (S1, ep 12).

Journey to an Indian village where men train to become bouncers in the big city. Elsewhere, take a tour of the Chinese settlement where fire erupts from the ground. (S1, ep 1).

The Pharaohs' Curse: Could a curse really exist on Tutankhamun's tomb, but in the form of alien technology designed to protect an incredible secret about our past? (S10, ep 4).

The Science Wars: Examining claims that extraordinary discoveries are being ignored by the scientific community for not conforming to their accepted paradigm. (S10, ep 5).

City of the Gods: The ancient metropolis of Teotihuacan, called The City of The Gods by the Aztecs, is a site of great mystery. Could alien beings have once lived there? (S10, ep 6).

Stirling: Stirling has long been one of the most strategically important castles in Britain. Dan Jones examines the rich and savage history of this stronghold. (S1, ep 5).

Carrickfergus: Dan visits one of Northern Ireland's oldest castles, Carrickfergus, to learn more about the tempestuous relationship between Britain and Ireland. (S1, ep 6).

Edinburgh: A look at one of Scotland's most popular paid tourist attraction. With a slew of sieges to its name, it is no surprise that the site boasts some formidable defences. (1 of 5).

The Pharaohs' Curse: Could a curse really exist on Tutankhamun's tomb, but in the form of alien technology designed to protect an incredible secret about our past? (S10, ep 4).

The Science Wars: Examining claims that extraordinary discoveries are being ignored by the scientific community for not conforming to their accepted paradigm. (S10, ep 5).

Journey to an Indian village where men train to become bouncers in the big city. Elsewhere, take a tour of the Chinese settlement where fire erupts from the ground. (S1, ep 1).

The Right Tools: Victory in war doesn't just require sound military strategy, vital resources and equipment are also critical. Discover how the Axis powers failed in this regard. (S1, ep 4).

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

The Troubling Tale of Bute Inlet Gold Pt. 1: The search for Slumach's gold sends the team 300 kilometres away into the heart of the mystery. (S1, ep 6).

The Birth of Mickey: Recount the birth of Mickey Mouse, from being created as a pencil sketch to rocketing into untouchable, lasting fame. (S1, ep 1).

Panzer Pals: Hans Jochaim-Horn breaks into a German army base, steals a tank and smashes through three sets of gates at Schwalmstadt Prison to breakout his friend. (S1, ep 10).

Society: Explore the theme of society and myths that engulf memories of the past. These myths often become woven into the fabric of our society and can pass through generations. (S1, ep 4).

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

Zeus: 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. (S1, ep 10).

The Pharaohs' Curse: Could a curse really exist on Tutankhamun's tomb, but in the form of alien technology designed to protect an incredible secret about our past? (S10, ep 4).

The Science Wars: Examining claims that extraordinary discoveries are being ignored by the scientific community for not conforming to their accepted paradigm. (S10, ep 5).

City of the Gods: The ancient metropolis of Teotihuacan, called The City of The Gods by the Aztecs, is a site of great mystery. Could alien beings have once lived there? (S10, ep 6).

Zeus: 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. (S1, ep 10).

Carrickfergus: Dan visits one of Northern Ireland's oldest castles, Carrickfergus, to learn more about the tempestuous relationship between Britain and Ireland. (S1, ep 6).

Edinburgh: A look at one of Scotland's most popular paid tourist attraction. With a slew of sieges to its name, it is no surprise that the site boasts some formidable defences. (1 of 5).

The Right Tools: Victory in war doesn't just require sound military strategy, vital resources and equipment are also critical. Discover how the Axis powers failed in this regard. (S1, ep 4).

The Alien Frequency: Different cultures have used mantras and chanting for thousands of years - could these in fact be a method of communing with extraterrestrial forces? (S10, ep 7).

The Majestic Twelve: Did a top secret group of officials, dubbed the Majestic Twelve, really create a space programme that has already established bases on the moon? (S10, ep 8).

The Akashic Record: Experts question if Cloud computing represents the rediscovery of an ancient repository of knowledge known as the Akashic Record. (S10, ep 9).

George III - More Than His Madness: George III, the first Georgian King born in Britain, faces the American Revolution and family scandals. (S1, ep 3).

The race to develop the first atomic bomb was critical amid the struggle for WWII victory. Experts reveal new evidence behind Germany's top-secret development of nuclear weapons. (S1, ep 1).

The Pierre Hotel Robbery: Two skilled thieves go after New York's Pierre Hotel. The team take over the hotel, getting into the lobby vault and hundreds of safe deposit boxes. (S1, ep 3).

Visit a luxury survival condo in Kansas, a minefield in Sarajevo and the King Cobra Village in Thailand. Elsewhere, explore the \"fake\" pentagon on the outskirts of Shanghai. (S1, ep 2).

Learn about Togo's traditional religious practices and take a tour of the incredible Danakil Desert in Ethiopia. Plus, visit a city in Georgia where every citizen has a gun. (S1, ep 3).

Visit some of the world's most unusual houses, explore the Bangladeshi city with the largest number of cycle rickshaws and travel to the richest village in all of China. (S1, ep 4).

The Alien Frequency: Different cultures have used mantras and chanting for thousands of years - could these in fact be a method of communing with extraterrestrial forces? (S10, ep 7).

The Majestic Twelve: Did a top secret group of officials, dubbed the Majestic Twelve, really create a space programme that has already established bases on the moon? (S10, ep 8).

From December 1941 to May 1942, Singapore falls, the Wannsee Conference is held in Berlin and a single event in the Pacific transforms the war into a total global conflict.

Cardiff: Dan Jones explores the history of Cardiff castle over more than 2,000 years and reveals how it transformed into a lavish Victorian home. (2 of 5).

York: Dan explores the history of York's castle, from the Viking Jorvik and the Normans, to the dark days of the anti-Jewish pogrom and the imprisonment of the Knights Templar. (3 of 5).

The Akashic Record: Experts question if Cloud computing represents the rediscovery of an ancient repository of knowledge known as the Akashic Record. (S10, ep 9).

The Battle of Thermopylae: Journey back to 480 BC, when King Leonidas and his 300 Spartans successfully blocked Xerxes' two-million-strong Persian army at Thermopylae. (S1, ep 3).

Leaders: 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. (S1, ep 3).

The Alien Frequency: Different cultures have used mantras and chanting for thousands of years - could these in fact be a method of communing with extraterrestrial forces? (S10, ep 7).

The Majestic Twelve: Did a top secret group of officials, dubbed the Majestic Twelve, really create a space programme that has already established bases on the moon? (S10, ep 8).

The Akashic Record: Experts question if Cloud computing represents the rediscovery of an ancient repository of knowledge known as the Akashic Record. (S10, ep 9).

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

Cardiff: Dan Jones explores the history of Cardiff castle over more than 2,000 years and reveals how it transformed into a lavish Victorian home. (2 of 5).

York: Dan explores the history of York's castle, from the Viking Jorvik and the Normans, to the dark days of the anti-Jewish pogrom and the imprisonment of the Knights Templar. (3 of 5).

Taj Mahal: A walk through the iconic mausoleum complex, located in India and commissioned in 1632 by the Mughal emperor Shah Jahan to house the remains of his beloved wife.

The Storming of Area 51: When millions responded to a call to storm Area 51, the US military vowed deadly force. Are they hiding the truth about extraterrestrials on Earth? (S12, ep 20).

Secrets of the Exoplanets: Over the past 20 years, thousands of potentially habitable exoplanets have been found. Could they be home to intelligent extraterrestrial life? (S12, ep 22).

The search for missing mountaineer Janet Mae Johnson, from 1973, gains momentum with the discovery of her backpack and camera in 2020. (S4, ep 1).

Ju52: Explore classic and underrated aircraft, from WWII fighters to the Screaming Eagles F4, showcasing aviation's evolving history. (S3, ep 2).

Journey to an Indian village where men train to become bouncers in the big city. Elsewhere, take a tour of the Chinese settlement where fire erupts from the ground. (S1, ep 1).

The Storming of Area 51: When millions responded to a call to storm Area 51, the US military vowed deadly force. Are they hiding the truth about extraterrestrials on Earth? (S12, ep 20).

Secrets of the Exoplanets: Over the past 20 years, thousands of potentially habitable exoplanets have been found. Could they be home to intelligent extraterrestrial life? (S12, ep 22).

From ancient Egypt - when the Pharaohs ruled - to Anglo-Saxon England, uncover the origins of the curses surrounding the Bust of Nefertiti, the Staffordshire Hoard and more. (S1, ep 1).

Leeds: Dan Jones explores the 900-year history of the beautiful Leeds Castle in Kent, from its origins as a royal Saxon family's manor to a 20th-century retreat for the rich. (4 of 6).

The Holy Sepulchre of Jerusalem: Uncover the secrets of the Holy Sepulchre, the sacred Christian site built in the same spot as the death and resurrection of Jesus. (S3, ep 1).

Ju52: Explore classic and underrated aircraft, from WWII fighters to the Screaming Eagles F4, showcasing aviation's evolving history. (S3, ep 2).

Military Mysteries: Discover an array of mysterious phenomena seen from above, including a Nazi weapon in Northern France and a Russian military tower near Chernobyl. (S1, ep 2).

Visit Italy's most fascinating ghost town, learn about an edible bird nest in Malaysia and explore the Bollate Prison. Plus, check out a structure dubbed the Dr Seuss House. (S1, ep 6).

Could history's most powerful men know more about extra-terrestrials than us? Experts explore the complex relationship between presidents and aliens. (S1, ep 13).

Ancient Global Warming: Did our ancestors believe they were cursed? Professor Alice Roberts explores historic cataclysmic events such as wars and floods to dispel the myths. (1 of 5).

The Kaiser Sunken Fleet: Ross Kemp continues his adventure in Scapa Flow, plunging down on the wrecks of a German warship and an experimental submarine aircraft called the M2. (S1, ep 2).

The search for missing mountaineer Janet Mae Johnson, from 1973, gains momentum with the discovery of her backpack and camera in 2020. (S4, ep 1).