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).

Great Smokey Mountains National Park: A stroll through a national park that is the alleged underground base for a powerful secret society. (S2, ep 5).

Canyonlands National Park: A demonic truck driver, disembodied voices, nightmarish skinwalkers and a time loop are all reported to exist in Canyonlands National Park. (S2, ep 12).

Quest for Bayou Gold: Troy Landry chases legendary treasure hidden deep in the bayou, helped by his right-hand man Pickle Wheat and veteran hunter Don Brewer. (S2, ep 4).

Snapshot: Ten glassblowers take up the challenge to make a piece of art that represents who they are, by using photographs from their past. (S1, ep 1).

Potluck Party: The remaining contestants create masterpieces such as a bento box and a glass taco stand in a food-themed challenge. (S1, ep 2).

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 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).

Chaco Culture National Historical Park: Built by the ancient Anasazi, spooky sightings in this national park include shape-shifting creatures and time-traveling Wingmakers. (S2, ep 7).

Yosemite National Park: The infamous Yosemite National Park has a darker side that includes mysterious sightings, disappearances and even a prehistoric pterodactyl. (S2, ep 8).

Croc Invasion: Troy rushes to Florida to find a Nile crocodile, one of the world's deadliest animals - and recruits expert gator wranglers to capture the beast. (S2, 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).

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. (1 of 6).

UFO Dogfights: The team examines a declassified US Department of Defense report which analyses an alleged encounter between a fighter pilot and a UFO. (S1, ep 8).

Ambulance Trains: From the trench to the home front hospital, a medical historian retraces the train journey made by wounded soldiers during World War I. (S1, ep 3).

Investigate alien-like metal monsters coming from the sea, a war between 30 million crabs and an army of killer ants, and the white wall of death from which there is no escape. (S5, ep 2).

Halifax Explosion: When the SS Mont-Blanc and the SS Imo collided in 1917 in the harbour of Halifax, Canada, the subsequent explosion killed or injured almost 11,000 people. (S1, ep 3).

Nazi She-Devil: Explore how women were active, often violent participants in the war and its atrocities - especially during the holocaust. (S1, ep 2).

Striking Distance: It's 1944 and Sgt Jack Werner is among the men storming the beaches of Leyte in the Philippines to liberate the POWs who have been stranded there. (7 of 10).

Cambodian Civil War: 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? (S2, ep 7).

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 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).

Rise of the Machines: While the single shot rifle remained a mainstay until WWI, machine guns had been in development since the final days of the American Civil War. (2 of 3).

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).

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. (1 of 6).

UFO Dogfights: The team examines a declassified US Department of Defense report which analyses an alleged encounter between a fighter pilot and a UFO. (S1, ep 8).

Return to Antarctica: Rumours are rife that aliens inhabit the continent of Antarctica, but is it true? This episode explores the icy wilderness to find out. (S12, ep 1).

The Badlands Guardian: The series investigates satellite images of what seems to be a giant face carved into the earth in Alberta. Could this have extraterrestrial origins? (S12, ep 2).

Element 115: Physicist Bob Lazar says he was hired to reverse-engineer an alien spacecraft by the US government, with a fuel source that had the power to change the world. (S12, ep 3).

War of the Republic of Texas: The movement for Texas to gain independence takes a dangerous turn. When rivalling groups start taking hostages - the Texas Rangers must intervene. (S1, ep 5).

Ancient Civilisations: Nubian pyramids reveal the rise of female power in Ancient Kush, while satellite images uncover secrets of an ancient Puebloan site in New Mexico. (S1, ep 5).

Return to Antarctica: Rumours are rife that aliens inhabit the continent of Antarctica, but is it true? This episode explores the icy wilderness to find out. (S12, ep 1).

The Badlands Guardian: The series investigates satellite images of what seems to be a giant face carved into the earth in Alberta. Could this have extraterrestrial origins? (S12, ep 2).

A look at the possibility that life began on Mars and travelled to Earth. Plus, if aliens exist, what plans do they have in store for us? Experts investigate. (S1, ep 5).

Striking Distance: It's 1944 and Sgt Jack Werner is among the men storming the beaches of Leyte in the Philippines to liberate the POWs who have been stranded there. (7 of 10).

Investigate the haunting history of the town that time forgot, unexplained circles in the New Mexico desert and a possible clue to extra-terrestrial life in the Arctic. (S5, ep 1).

A team of experts investigate some of the most well-known UFO cases of the last 75 years, hoping to uncover the truth. (S1, ep 4).

A look at the possibility that life began on Mars and travelled to Earth. Plus, if aliens exist, what plans do they have in store for us? Experts investigate. (S1, ep 5).

Finger of Death: A grim discovery in a Swedish lake reveals shocking ancient practices. Meanwhile, in the Canadian Arctic, the fossil of a previously unknown mammal is found. (S3, ep 1).

UFO Dogfights: The team examines a declassified US Department of Defense report which analyses an alleged encounter between a fighter pilot and a UFO. (S1, ep 8).

The Jericho Head, the Cloudbuster and the Map: Examine a 9,000-year-old clay head, a 1950s machine built to control the weather and a map which could be the oldest ever found. (S2, ep 7).

Pirates and Tornados: Flying into a highly volatile region, crews battle pirates, tornadoes and riots to salvage a wrecked cargo ship. (S1, ep 6).

The End Game: The battle hits a turning point and Donitz unleashes an advanced torpedo to flip the momentum. Roberts and Laidlaw must devise a strategy to combat the new threat. (S1, ep 6).

Suicidal Maidens: This episode delves into Hitler's controlling sexual nature. The four women pursued by him, including his niece, only saw one way out of the relationship - death. (4 of 4).

Return to Antarctica: Rumours are rife that aliens inhabit the continent of Antarctica, but is it true? This episode explores the icy wilderness to find out. (S12, ep 1).

The Badlands Guardian: The series investigates satellite images of what seems to be a giant face carved into the earth in Alberta. Could this have extraterrestrial origins? (S12, ep 2).

Element 115: Physicist Bob Lazar says he was hired to reverse-engineer an alien spacecraft by the US government, with a fuel source that had the power to change the world. (S12, ep 3).

Nazi She-Devil: Explore how women were active, often violent participants in the war and its atrocities - especially during the holocaust. (S1, ep 2).

A team of experts investigate some of the most well-known UFO cases of the last 75 years, hoping to uncover the truth. (S1, ep 4).

Finger of Death: A grim discovery in a Swedish lake reveals shocking ancient practices. Meanwhile, in the Canadian Arctic, the fossil of a previously unknown mammal is found. (S3, ep 1).

The Star Gods of Sirius: Experts investigate whether aliens from a tiny star visited humans in the past, and left behind a clue that still remains in our language. (S12, ep 4).

They Came From The Sea: From octopuses that can edit their DNA to jellyfish that can live forever, were the unusual creatures of our oceans delivered to Earth by aliens? (S12, ep 5).

Secrets of the Maya: When Spanish Conquistadors obliterated the Mayan people's history, could they have erased proof of extraterrestrial visitors? Experts investigate. (S12, ep 6).

Burning Rainbow Farm: Tom Crosslin and his partner Rolland Rohm held pro-marijuana festivals at Rainbow Farm before a teenager's death and a standoff stun the local community. (S1, ep 6).

Unreachable Places: Discover strange markings in the remote region of Northern Finland and reveal secrets found deep in the Antarctic. (S1, ep 6).

The Star Gods of Sirius: Experts investigate whether aliens from a tiny star visited humans in the past, and left behind a clue that still remains in our language. (S12, ep 4).

They Came From The Sea: From octopuses that can edit their DNA to jellyfish that can live forever, were the unusual creatures of our oceans delivered to Earth by aliens? (S12, ep 5).

Qin Shi Tomb, Soma, Chinchorro: What could justify the tomb of Qin Shi Huang, the first Emperor of China, being so grand? And can signs of cannibalism shed light on Neanderthals? (S1, ep 5).

The First Viking Raid: Lindisfarne was a peaceful, holy island, until the Vikings arrived. Tim Sutherland joins archaeologists as they uncover the realities of the Viking raid. (S1, ep 1).

Cambodian Civil War: 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? (S2, ep 7).

The Jericho Head, the Cloudbuster and the Map: Examine a 9,000-year-old clay head, a 1950s machine built to control the weather and a map which could be the oldest ever found. (S2, ep 7).

Qin Shi Tomb, Soma, Chinchorro: What could justify the tomb of Qin Shi Huang, the first Emperor of China, being so grand? And can signs of cannibalism shed light on Neanderthals? (S1, ep 5).

The First Viking Raid: Lindisfarne was a peaceful, holy island, until the Vikings arrived. Tim Sutherland joins archaeologists as they uncover the realities of the Viking raid. (S1, ep 1).

Cambodian Civil War: 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? (S2, ep 7).

Time Travel: Could the ability to travel through time be real? Experts unseal new evidence suggesting this phenomenon of science fiction might not be as far-fetched as it seems. (S1, ep 16).

Nazis Today: Many believe Hitler and key members of his inner circle survived the fall of Berlin. If so, where did they go? And did they flee with plans for revenge? (S1, ep 17).

Doomsday Hieroglyphs: New research and modern computer graphics shed light on our doomed future as forecast in centuries gone by. Can we avoid our fate by heeding these warnings? (S1, ep 4).

Abandon All Hope Diamond: A diamond with a sinister past, the bones of a world-famous bard and a beach covered in cursed stones - who dares to disturb their peace? (S1, ep 2).

In 1993, a teenage girl walking her dog in Shropshire, England, witnesses a cylindrical object in the sky. School kids in Florida report multiple UFO sightings in 1967. (S2, ep 2).

In 1966, two Ohio police officers spot a strange light in the sky, triggering a chase across state lines. An ex-military man in Florida is knocked out by a beam of light in 1965. (S2, ep 3).

The Star Gods of Sirius: Experts investigate whether aliens from a tiny star visited humans in the past, and left behind a clue that still remains in our language. (S12, ep 4).

They Came From The Sea: From octopuses that can edit their DNA to jellyfish that can live forever, were the unusual creatures of our oceans delivered to Earth by aliens? (S12, ep 5).

Secrets of the Maya: When Spanish Conquistadors obliterated the Mayan people's history, could they have erased proof of extraterrestrial visitors? Experts investigate. (S12, ep 6).

Deadly Poisons: For some covert missions, assassination is the goal, and lethal toxins are deployed by spy agencies to kill perceived foes.

The Jericho Head, the Cloudbuster and the Map: Examine a 9,000-year-old clay head, a 1950s machine built to control the weather and a map which could be the oldest ever found. (S2, ep 7).

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

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).

Apache-Sitgreaves National Forest: A trip through the ginormous forest in Arizona. Strange encounters rumoured to have happened there include an alien abduction. (S2, ep 4).

Yosemite National Park: The infamous Yosemite National Park has a darker side that includes mysterious sightings, disappearances and even a prehistoric pterodactyl. (S2, ep 8).

Croc Invasion: Troy rushes to Florida to find a Nile crocodile, one of the world's deadliest animals - and recruits expert gator wranglers to capture the beast. (S2, ep 5).

Lighten Up: The eight artists are challenged to make a light fixture using techniques such as colour wrapping, hot sculpting and making bubbles with baking soda. (S1, ep 3).

Clash of the Robots: The seven contestants put their skills into making a glassy robot prototype that can preform chores and tasks. (S1, 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).

Great Sand Dunes National Park: A stroll through Great Sand Dunes National Park, where strange lights, animal mutilations and other bizarre incidents have been spotted. (S2, ep 9).

Cleveland National Forest: Explore Cleveland National Forest, where reports of gun-wielding ghosts, savage creatures and otherworldly portals are rife. (S2, ep 3).

Skunk Ape: Deep in the Everglades, Troy recruits an army of swampers to investigate reports of a possible beast - the Skunk Ape - probing his friend's home. (S2, 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).

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. (2 of 6).

Vortexes: The team travels to Sedona, Arizona, long known for strange phenomena, to interview witnesses to unexplained sightings of lights and objects in the skies. (S1, ep 9).

The First Railroad War: The story of the Great Locomotive Chase - an attempt by Northern spies to steal steam locomotive The General during the American Civil War. (S1, ep 4).

Explore the mystery of the stone giant and the vanishing desert kingdom, and nukes and spooks in the Middle East. Plus, Harry Potter's Hedwig reveals her dark side. (S5, ep 3).

Miami Heat: Ton and Allen uncover three out-of-this-world finds, including an early NASA countdown clock and a 1960s Delta Relay rocket. (S2, ep 5).

Chicago Grand Slam: Freezing Chicago throws up a 1984 snowmobile, a signed 1920s baseball glove and an authentic Robby the Robot collector toy. (S2, ep 6).

Queen Tiye: 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. (S1, ep 1).

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.

Black Beast of Exmoor: On the moors of England over 200 livestock were torn apart between 1979 and 1983. Some suggest that this was the work of a strange 'black beast.

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).

Suicidal Maidens: This episode delves into Hitler's controlling sexual nature. The four women pursued by him, including his niece, only saw one way out of the relationship - death. (4 of 4).

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).

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. (2 of 6).

Vortexes: The team travels to Sedona, Arizona, long known for strange phenomena, to interview witnesses to unexplained sightings of lights and objects in the skies. (S1, ep 9).

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).

Great Sand Dunes National Park: A stroll through Great Sand Dunes National Park, where strange lights, animal mutilations and other bizarre incidents have been spotted. (S2, ep 9).

Cleveland National Forest: Explore Cleveland National Forest, where reports of gun-wielding ghosts, savage creatures and otherworldly portals are rife. (S2, ep 3).

Skunk Ape: Deep in the Everglades, Troy recruits an army of swampers to investigate reports of a possible beast - the Skunk Ape - probing his friend's home. (S2, ep 6).

Thirsty Work: The contestant's next challenge is to make drinking glasses and decanters in a combination of fashion and function. (S1, ep 5).

Pop Art Blowup: The remaining contestants must get creative to make colourful works of art out of everyday household items. (S1, ep 6).

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).

Crater Lake National Park: This tourist hotspot is also rumoured to be the epicentre of dark and sinister forces from Native American lore that lure visitors to their deaths. (S2, ep 11).

Canyonlands National Park: A demonic truck driver, disembodied voices, nightmarish skinwalkers and a time loop are all reported to exist in Canyonlands National Park. (S2, ep 12).

A Family Secret: Armed with a mysterious map and unprecedented access to sacred Native American land, the Weibert family sets out to solve the mystery of Custer's lost gold. (S1, ep 1).

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 Means to Victory: The story of a deadly war that intertwines Germany, Poland, Japan, Italy and Spain, and the remorseless development of weapons and bombers. (3 of 6).

The NASA Files: The team analyses incredible NASA footage of reported UFOs, and interviews former NASA employees who allegedly witnessed cover ups first hand. (S1, ep 10).

Precious Cargo: The astonishing accounts of four railway journeys that changed history, including the perilous expedition that made a young Winston Churchill world famous. (S1, ep 5).

Learn about the mystery of the vanishing lake, toxic hell storms, CIA-trained killer monks and polar bears that stalked stricken World War II heroes. (S5, ep 4).

A team of experts investigate some of the most well-known UFO cases of the last 75 years, hoping to uncover the truth. (S1, ep 5).

Wernher Von Braun: Wernher von Braun was vital to NASA's Apollo 11 mission to put a man on the Moon, but this 'American hero' had his Nazi past kept under wraps. (S1, ep 2).

Thousands of UFO sightings and abductions are reported every year. This series examines these accounts and casts new light on historic cases. (S1, ep 8).

Unreal Estates: Immerse yourself in the jaw-dropping world of three crazy rich ancients who built some of the largest, most luxurious palaces ever known to man. (S1, ep 7).

Mega Mausoleums: These crazy rich ancients poured their money into building the most luxurious final resting places for themselves after death. (S1, ep 8).

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).

Wernher Von Braun: Wernher von Braun was vital to NASA's Apollo 11 mission to put a man on the Moon, but this 'American hero' had his Nazi past kept under wraps. (S1, ep 2).

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 Means to Victory: The story of a deadly war that intertwines Germany, Poland, Japan, Italy and Spain, and the remorseless development of weapons and bombers. (3 of 6).

The NASA Files: The team analyses incredible NASA footage of reported UFOs, and interviews former NASA employees who allegedly witnessed cover ups first hand. (S1, ep 10).

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).

Voices of the Gods: Do India's Sanskrit texts, with their descriptions of advanced technology, lend themselves to the theory that aliens once walked amongst us? (S10, ep 10).

Crater Lake National Park: This tourist hotspot is also rumoured to be the epicentre of dark and sinister forces from Native American lore that lure visitors to their deaths. (S2, ep 11).

Canyonlands National Park: A demonic truck driver, disembodied voices, nightmarish skinwalkers and a time loop are all reported to exist in Canyonlands National Park. (S2, ep 12).

A Family Secret: Armed with a mysterious map and unprecedented access to sacred Native American land, the Weibert family sets out to solve the mystery of Custer's lost gold. (S1, ep 1).

Dual Intent: The contestants buddy up as they are challenged to make two-piece sculptures. (S1, ep 7).

The Glass Is Greener: The remaining contestants are challenged to work with scale, colour and texture to create masterfully crafted botanical-themed pieces. (S1, 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).

Voices of the Gods: Do India's Sanskrit texts, with their descriptions of advanced technology, lend themselves to the theory that aliens once walked amongst us? (S10, ep 10).

Join a voyage to Farne Islands, home to seals and seabirds, early Christian communities and one of the first landing sites for the terrifying Viking raiders. (1 of 4).

Writings on the Wall: In Montana, Penny and Craig close in on the priceless cache of weapons stripped from Custer's soldiers after the Battle of the Little Big Horn. (S1, ep 2).

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).

The World at War: The story of a deadly war that intertwines Germany, Poland, Japan, Italy and Spain, and the remorseless development of weapons and bombers. (4 of 6).

Military vs. UFOs: The team examine incidents of alleged conflicts between the US Air Force and the RAF, and asking whether these encounters have been covered up. (S1, ep 11).

Secrets And Lies: 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? (S1, ep 6).

Explore the mystery of a sunken fleet in Maryland, weird Arctic holes that NASA cannot explain and strange structures in the desert close to Area 51. (S5, ep 5).

Unbreakable Codes: For centuries, mankind has devised ingenious ways to hide information, from enigmatic puzzles to secret symbols. Can we unlock these great mysteries? (S4, ep 7).

Strange Tales of WWII: Throughout history's largest and deadliest human conflict, a number of intriguing and persistent mysteries were born - from lost gold to secret societies. (S4, ep 8).

Ancient Warrior Sacrifice: In a Danish bog, hundreds of mutilated ancient bones are found, while a mysterious deserted island belonging to Russia is explored. (S3, ep 2).

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 6).

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).

Voices of the Gods: Do India's Sanskrit texts, with their descriptions of advanced technology, lend themselves to the theory that aliens once walked amongst us? (S10, ep 10).

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).

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).

The World at War: The story of a deadly war that intertwines Germany, Poland, Japan, Italy and Spain, and the remorseless development of weapons and bombers. (4 of 6).

Military vs. UFOs: The team examine incidents of alleged conflicts between the US Air Force and the RAF, and asking whether these encounters have been covered up. (S1, ep 11).

The Animal Agenda: Going by ancient cultures' depictions of gods appearing as animals, could it be that extraterrestrials bear more resemblance to animals than humans? (S10, ep 11).

The Replicants: While many believe in reincarnation, experts suggest that extraterrestrials designed the human body to be a vessel for otherworldly beings. (S10, ep 12).

Join a voyage to Farne Islands, home to seals and seabirds, early Christian communities and one of the first landing sites for the terrifying Viking raiders. (1 of 4).

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).

By Night & By Day: The story of a deadly war that intertwines Germany, Poland, Japan, Italy and Spain, and the remorseless development of weapons and bombers. (5 of 6).

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).

First World War: A look into how the efficiency of the rail networks on both sides helped cause the stalemate of the First World War. (S1, ep 7).

Learn about the hunting of Jack the Ripper from space, the battle of the big guns in the land of the Bible, the clash of the mega-beasts, and a visitation from another galaxy. (S5, ep 6).

Maya, Khonkho Wankane, Xiongnu: Could new evidence found at the sacrificial alter, El Castillo, shed light on the Maya? And what can science tell us about ancient chemists? (S1, ep 6).

The Viking Burial Ships of Estonia: Venture to Estonia, where the earliest known Vikings ships to have crossed the Baltic - as well as mass ship burials - have been uncovered. (S1, ep 3).

Armed And Defenseless: Discover the fate of mankind's machinery of war in a world with no people, in which Pearl Harbor comes under renewed attacks, and snow causes urban avalanches.

Campus Haunting, Touched by a Demon: When a family move to an old house on a hospital campus, each member experiences the inexplicable. Events escalate until they must flee. (S1, ep 8).

The Animal Agenda: Going by ancient cultures' depictions of gods appearing as animals, could it be that extraterrestrials bear more resemblance to animals than humans? (S10, ep 11).

The Replicants: While many believe in reincarnation, experts suggest that extraterrestrials designed the human body to be a vessel for otherworldly beings. (S10, ep 12).

Thousands of UFO sightings and abductions are reported every year. This series examines these accounts and casts new light on historic cases. (S1, ep 8).

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).

By Night & By Day: The story of a deadly war that intertwines Germany, Poland, Japan, Italy and Spain, and the remorseless development of weapons and bombers. (5 of 6).

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).

A Spaceship Made of Stone: The Ishi-no-Hoden megalith in Japan was supposedly built to depict an ancient flying ship. Could this have been an ancient alien vessel? (S10, ep 13).

Alien Discs: Hundreds of seemingly alien discs are found in China, only to be taken by the Chinese government and dismissed as a hoax. Is there more to the story? (S10, ep 14).

Starting on the Isle of Lewis in the Outer Hebrides, witness the 5,000-year-old standing stones of Callanish, traditional Scottish blackhouses, and cut peat with a modern crofter. (2 of 4).

The Last Stand: Guided by Native American legend, the team unearths a Custer-era bullet at the edge of the battlefield. If authentic, it could lead them to the secret cache. (S1, ep 3).

Mirror, Mirror: The competitors look to mirrors for inspiration as they take a moment to reflect before creating pieces that represent how they see themselves. (S2, ep 1).

Think Inside the Box: In the tricky mystery box challenge, the competitors are tasked with creating different household items. (S2, ep 2).

A Spaceship Made of Stone: The Ishi-no-Hoden megalith in Japan was supposedly built to depict an ancient flying ship. Could this have been an ancient alien vessel? (S10, ep 13).

Alien Discs: Hundreds of seemingly alien discs are found in China, only to be taken by the Chinese government and dismissed as a hoax. Is there more to the story? (S10, ep 14).

Set sail for Rathlin Island as we explore a Neolithic stone tool factory, a unique upside-down lighthouse and a World War II shipwreck. (3 of 4).

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

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

Terror of the World: The story of a deadly war that intertwines Germany, Poland, Japan, Italy and Spain, and the remorseless development of weapons and bombers. (6 of 6).

From medieval Britain to the Northwest Passage in the Arctic, uncover the origins of the curses surrounding the Stone of Destiny, Landseer's Man Proposes, God Disposes and more. (S1, ep 2).

Second World War: Homefront: Eyewitness accounts of how trains were able to bring back troops from Dunkirk, and evacuate hundreds of children to safety. (S1, ep 8).

Explore a shipwreck found in the middle of the desert, learn about the German aerial terror of WW1 and traverse through a ghost town still stalked by a serial killer. (S5, ep 7).

SS Clare Lilley: For decades, residents in Nova Scotia have reported munitions washing up on their shores - believed to have come from the wreck of the SS Clare Lilley. (S1, ep 4).

Cougars and Fantasists: Meet the women who took Hitler under their wing, training him in the methods of high society and power - only to be left behind once he achieved it. (S1, ep 3).

Glory And Guts: True stories from WWII. Reporter Robert Sherrod accompanies Marines on their assault of Iwo Jima and witnesses the horror of the fight and the iconic flag raising. (8 of 10).

Exporting Cuba's Revolution: After the Cuban revolution, Fidel Castro looked to exert his influence in Venezuela. Is Cuba still in charge of Venezuela's future? (S2, ep 8).

A Spaceship Made of Stone: The Ishi-no-Hoden megalith in Japan was supposedly built to depict an ancient flying ship. Could this have been an ancient alien vessel? (S10, ep 13).

Alien Discs: Hundreds of seemingly alien discs are found in China, only to be taken by the Chinese government and dismissed as a hoax. Is there more to the story? (S10, ep 14).

The Gods of War: The industrial revolution changed it all when it came to cannons as they evolved from wholly inaccurate and immobile to deadly killing machines. (3 of 3).

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

Terror of the World: The story of a deadly war that intertwines Germany, Poland, Japan, Italy and Spain, and the remorseless development of weapons and bombers. (6 of 6).

From medieval Britain to the Northwest Passage in the Arctic, uncover the origins of the curses surrounding the Stone of Destiny, Landseer's Man Proposes, God Disposes and more. (S1, ep 2).

The Druid Connection: Experts examine strange stone structures on New England and New York's landscapes. Could they be clues of alien visitors to Earth? (S12, ep 7).

The Reptillian Agenda: Serpent gods are found in many religious texts. Could these stories be describing reptile-like extraterrestrials? And are they still here today? (S12, ep 8).

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).

Inventions and Discoveries: Explore the groundbreaking discoveries, inventions and inventors throughout history that have changed the way we live our lives. (S1, ep 1).

Ghost Towns: Drones reveal what is left of Henry Ford's suburb in the Amazon, while clues to what killed a once-vibrant Pennsylvania mining town is discovered. (S1, ep 7).

The Druid Connection: Experts examine strange stone structures on New England and New York's landscapes. Could they be clues of alien visitors to Earth? (S12, ep 7).

The Reptillian Agenda: Serpent gods are found in many religious texts. Could these stories be describing reptile-like extraterrestrials? And are they still here today? (S12, 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 6).

Glory And Guts: True stories from WWII. Reporter Robert Sherrod accompanies Marines on their assault of Iwo Jima and witnesses the horror of the fight and the iconic flag raising. (8 of 10).

Abandon All Hope Diamond: A diamond with a sinister past, the bones of a world-famous bard and a beach covered in cursed stones - who dares to disturb their peace? (S1, ep 2).

A team of experts investigate some of the most well-known UFO cases of the last 75 years, hoping to uncover the truth. (S1, ep 5).

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 6).

Ancient Warrior Sacrifice: In a Danish bog, hundreds of mutilated ancient bones are found, while a mysterious deserted island belonging to Russia is explored. (S3, ep 2).

Abandon All Hope Diamond: A diamond with a sinister past, the bones of a world-famous bard and a beach covered in cursed stones - who dares to disturb their peace? (S1, ep 2).

The Lost Standard, the Steam Gun and the Sacrificial Throne: Investigate an intriguing 3,500-year-old box, a steam-powered gun and a monument that may have been an Aztec throne. (S2, ep 8).

Where's the Anchor: In rough water, salvors scramble to retrieve a cruise ship's anchor lost at sea - but they have to find it first. (S1, ep 7).

Shipwrecked Sailors of the Roman Empire: Kevin Sempé dives in search of wrecks harking back to the Roman Empire. The journey begins with the Nave Romana. (S2, ep 1).

Romeo & Juliet: When Samantha Lopez and Ronald McIntosh develop a romantic connection, they hatch an ambitious escape plan that utilises Ron's experience as a helicopter pilot. (S1, ep 1).

The Druid Connection: Experts examine strange stone structures on New England and New York's landscapes. Could they be clues of alien visitors to Earth? (S12, ep 7).

The Reptillian Agenda: Serpent gods are found in many religious texts. Could these stories be describing reptile-like extraterrestrials? And are they still here today? (S12, ep 8).

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).

Cougars and Fantasists: Meet the women who took Hitler under their wing, training him in the methods of high society and power - only to be left behind once he achieved it. (S1, ep 3).

A team of experts investigate some of the most well-known UFO cases of the last 75 years, hoping to uncover the truth. (S1, ep 5).

Ancient Warrior Sacrifice: In a Danish bog, hundreds of mutilated ancient bones are found, while a mysterious deserted island belonging to Russia is explored. (S3, ep 2).

Project Hybrid: Experts explore animal mutilations and alien abductions as they ask whether extraterrestrials could be altering human DNA. (S12, ep 10).

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).

Entertainment: Examine the influence that popular culture and entertainment have on daily life. As we gravitate to larger-than-life stories, outlandish myths begin to spread. (S1, ep 2).

Desert Mysteries: Look down over a constant inferno in Turkmenistan, mysterious circles in the Namibian desert and secret electric blue ponds in Utah. (S1, ep 8).

Project Hybrid: Experts explore animal mutilations and alien abductions as they ask whether extraterrestrials could be altering human DNA. (S12, ep 10).

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

Maya, Khonkho Wankane, Xiongnu: Could new evidence found at the sacrificial alter, El Castillo, shed light on the Maya? And what can science tell us about ancient chemists? (S1, ep 6).

The Viking Burial Ships of Estonia: Venture to Estonia, where the earliest known Vikings ships to have crossed the Baltic - as well as mass ship burials - have been uncovered. (S1, ep 3).

Exporting Cuba's Revolution: After the Cuban revolution, Fidel Castro looked to exert his influence in Venezuela. Is Cuba still in charge of Venezuela's future? (S2, ep 8).

The Lost Standard, the Steam Gun and the Sacrificial Throne: Investigate an intriguing 3,500-year-old box, a steam-powered gun and a monument that may have been an Aztec throne. (S2, ep 8).

Maya, Khonkho Wankane, Xiongnu: Could new evidence found at the sacrificial alter, El Castillo, shed light on the Maya? And what can science tell us about ancient chemists? (S1, ep 6).

The Viking Burial Ships of Estonia: Venture to Estonia, where the earliest known Vikings ships to have crossed the Baltic - as well as mass ship burials - have been uncovered. (S1, ep 3).

Exporting Cuba's Revolution: After the Cuban revolution, Fidel Castro looked to exert his influence in Venezuela. Is Cuba still in charge of Venezuela's future? (S2, ep 8).

Secret Alien Attack: Are governments secretly preparing for an alien attack? From death stars to satellites, experts explore the likelihood of an extra-terrestrial strike. (S1, ep 18).

Top Ten Secret Societies: Could elite groups of power players be plotting the fate of the world? Discover the plans and goals of the world's most secretive organisations. (S1, ep 19).

Fatima's Lost Prophecy: In 1917, three young shepherd children from Fatima, Portugal, claimed to be instruments of divine prophecy. Was there truth to their allegations? (S1, ep 5).

Timur's Tomb: A neglected warning inside a mighty conqueror's tomb heeds one of the deadliest invasions in human history. (S1, ep 3).

In 1977, Amazonian village locals have a frightening encounter when a UFO shoots beams of light at them. An Australian farmer sees a strange object descend from the sky in 1963. (S2, ep 4).