NSW & WA: Rob and Shelley Hartland believe they live under a \"UFO super highway\". Meanwhile, Peter Khoury claims he experienced a close encounter - of the sexual kind. (S1, ep 5).

Gone Missing: Could an ex-cop have solved the mystery of Jimmy Hoffa's disappearance? Plus, experts investigate whether J F Kennedy's brain might have gone missing. (S1, ep 10).

The Forbidden Zones: Experts question whether the truth of our alien past could be buried in areas that, due to warfare or instability, are off-limits to exploration. (S8, ep 10).

Alien Messages: Could some of our ancient texts and structures be home to secret messages left by alien ancestors? If so, what can we learn from them? (S1, ep 6).

Aliens And The Creation Of Man: Can unexplained advances in human evolution be attributed to alien architects? Alien theorists look at the evidence. (S1, ep 8).

Within a quiet valley lies a battlefield full of bones and weapons predating any previously discovered battleground. What experts unearth will rewrite our understanding of warfare. (2 of 2).

The Perfect Spy: Motivations leading people to spy against their own nations tend to fall into one of four categories, as notorious cases demonstrate. (S1, ep 8).

Love and Betrayal: Love is a universal and powerful emotion but it can also be destructive, lust can destroy and betrayal can wound. (S1, ep 4).

The Forbidden Zones: Experts question whether the truth of our alien past could be buried in areas that, due to warfare or instability, are off-limits to exploration. (S8, ep 10).

Alien Messages: Could some of our ancient texts and structures be home to secret messages left by alien ancestors? If so, what can we learn from them? (S1, ep 6).

Close Encounters: Were Betty and Barney Hill really abducted by aliens? Experts investigate. They also explore the mystery of The Mothman, and Travis Walton's disappearance. (S1, ep 6).

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 French Revolution: With France composed of the Clergy, the Nobility and everyone else, the chance for people to escape a life of squalor can only come on a tide of change. (S1, ep 3).

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).

The Marvelous World of Disney: For years Disney has pushed the boundaries of art and science through the work of dreamers, designers and builders known as the 'Imagineers'. (S1, ep 6).

Queen Boudicca's Revolt: Revisiting the bloody British uprising against the Romans, presenter Karl Ude-Martinez tests out swords, spears and armour. (S1, ep 5).

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).

The Pagan: A divided Roman Empire is rocked by devastating earthquakes, fires, barbarian invasions and religious divides. Meanwhile, as Rome declines, the Colosseum lies empty. (S1, ep 8).

The Mad Bomber: Before the Unabomber, New Yorkers were terrified for 16 years by an attacker who planted bombs across the city. The culprit? An electrician named George Metesky. (S1, ep 5).

The Forbidden Zones: Experts question whether the truth of our alien past could be buried in areas that, due to warfare or instability, are off-limits to exploration. (S8, ep 10).

Alien Messages: Could some of our ancient texts and structures be home to secret messages left by alien ancestors? If so, what can we learn from them? (S1, ep 6).

Aliens And The Creation Of Man: Can unexplained advances in human evolution be attributed to alien architects? Alien theorists look at the evidence. (S1, ep 8).

Tolkien's Monsters: Enter JRR Tolkien's fantastical world of hobbits, orcs and wizards, and uncover the real-life influences that shaped his epic fantasy books. (S1, ep 9).

Hitler's Lovers: Discover the many lovers of Adolf Hitler - uncovering the unfortunate demise of all who dared resist his love, affection and sexual appetite. (S1, ep 4).

Queen Boudicca's Revolt: Revisiting the bloody British uprising against the Romans, presenter Karl Ude-Martinez tests out swords, spears and armour. (S1, ep 5).

Close Encounters: Were Betty and Barney Hill really abducted by aliens? Experts investigate. They also explore the mystery of The Mothman, and Travis Walton's disappearance. (S1, ep 6).

The New Evidence: Specialists in the field of the extraterrestrial examine new evidence that suggests there was extraterrestrial intervention on Earth in the distant past. (S9, ep 1).

Pyramids of Antarctica: Ancient Astronaut theorists suggest that aliens may have colonised an ice-free Antarctica, before a global event plunged it into the Ice Age. (S9, ep 2).

The Prototypes: Through history, mankind has credited its existence to otherworldly beings. Could this be true? Can any proof be found in these early beliefs? (S9, ep 3).

Sphinx: The most monumental ancient sculpture in the world, the half-man, half-lion Sphinx arouses the curiosity of the entire planet - but how was such a huge structure built? (S3, ep 5).

Castle of Chambord: Designed on the medieval model of forts with its enclosure and large corner towers, Chambord is France's largest and most iconic castle. (S3, ep 6).

The Gardner Museum Heist: Two thieves make off with a fortune's worth of artwork from a Boston museum. While the paintings remain missing, several suspects turn up dead. (S1, ep 8).

Pyramids of Antarctica: Ancient Astronaut theorists suggest that aliens may have colonised an ice-free Antarctica, before a global event plunged it into the Ice Age. (S9, ep 2).

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).

Werner Heisenberg: As one of their most controversial scientists, Heisenberg was key in the Nazis' efforts to build an atomic bomb. How close was he to achieving his goal? (S1, ep 3).

It's spring 1944 and on the Eastern Front, the momentum is firmly with allies as the war moves into its final, violent act. (S1, ep 7).

By January 1945, it seemed the end of the war was in sight - but challenges still loomed on the Eastern Front, in the Pacific and in Western Europe. (1 of 8).

In 218 BC, a Carthaginian army set out to challenge the might of Rome. The route chosen by Hannibal has been disputed ever since and researchers believe they could now have the answer.

Sphinx: The most monumental ancient sculpture in the world, the half-man, half-lion Sphinx arouses the curiosity of the entire planet - but how was such a huge structure built? (S3, ep 5).

Castle of Chambord: Designed on the medieval model of forts with its enclosure and large corner towers, Chambord is France's largest and most iconic castle. (S3, ep 6).

Doomsday: On 8 April 2011, the FBI declassified decades of top secret government documents for the first time. Here, experts examine the possibility of the end of the world. (S1, ep 1).

Bio Hazard Island: Experts examine the possibility of a secret US government facility accused of creating many diseases and biological weapons. (S1, ep 2).

Change & Revolution: How do communities form, survive and adapt? Explore how myths and legends shape societal rules and the punishments for those who break them. (S1, ep 5).

UFOs over LA: February 1942, and the sky over Los Angeles erupts as anti-aircraft guns begin firing on strange targets. Could this have been an extraterrestrial raid? (1 of 6).

Two cousins encounter a \"mothership\" three times the size of a football stadium in 1996. In 1967, guards at an air force base in Montana spot a UFO and all hell breaks loose. (S1, ep 1).

Dozens of witnesses report seeing a fiery object falling through the Pennsylvania sky in 1965. In 1997, Phoenix residents claim to spot boomerang-shaped UFOs above their homes. (S1, ep 2).

The New Evidence: Specialists in the field of the extraterrestrial examine new evidence that suggests there was extraterrestrial intervention on Earth in the distant past. (S9, ep 1).

Pyramids of Antarctica: Ancient Astronaut theorists suggest that aliens may have colonised an ice-free Antarctica, before a global event plunged it into the Ice Age. (S9, ep 2).

The Pagan: A divided Roman Empire is rocked by devastating earthquakes, fires, barbarian invasions and religious divides. Meanwhile, as Rome declines, the Colosseum lies empty. (S1, ep 8).

Raven Master Chris must introduce a new bird to the Tower's enclosure, while Constable Nicholas is in charge of the room where Guy Fawkes was interrogated. (S1, ep 4).

Decline And Fall: Scientists and historians join forces to investigate whether colossal volcanoes toppled an ancient dynasty and reveal the true face of an ancient mummy. (S1, ep 6).

Building a Super Power: Witness the truth behind the Ancient Egyptian superpower we know today as experts dive into the history of their iconic monuments and strong leaders. (S2, ep 1).

Secrets Of The Tombs: Experts question the startling similarities in burial tombs from distant cultures, asking if aliens could have influenced their complicated designs. (S5, ep 1).

Prophets & Prophecies: Did prophets such as Elijah and Joseph Smith communicate with a heavenly source or did they actually come into contact with extraterrestrials? (S5, ep 2).

Crime and Punishment: Explore the extreme punishments commonly used in ancient Egypt by homicidal royalty. (S2, ep 3).

Hate The English? Germany: Al meets up with Germany's self-appointed comedy ambassador to the UK, Henning Wehn, to pick through the bad blood between the two nations. (S1, ep 5).

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

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).

Secrets Of The Tombs: Experts question the startling similarities in burial tombs from distant cultures, asking if aliens could have influenced their complicated designs. (S5, ep 1).

Prophets & Prophecies: Did prophets such as Elijah and Joseph Smith communicate with a heavenly source or did they actually come into contact with extraterrestrials? (S5, ep 2).

Egypt's Elite: Using cutting-edge science, experts unravel the mysteries of Ancient Egypt's Elite, such as how Ramesses battled a biblical drought. (S2, ep 3).

Alien Engineering (Part 1 of 2): What would happen if a UFO did land on Earth and humans found it? Engineers create a 'spaceship' to see how alien technology could work. (S1, ep 14).

The Inca: Investigate the mighty Inca Empire and its accomplishments, including the construction of their awe-inspiring buildings in Cusco and Machu Picchu. (S2, ep 10).

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).

Roman Chester: Alice tells the story of Roman Britain by studying the history of Chester. She enjoys an authentic Roman feast and checks out an archaeological discovery. (1 of 6).

Montezuma's Curse: Three families begin an epic adventure across seven cities of gold, journeying Southwest America looking to break the 500-year-old curse of Emperor Montezuma. (1 of 8).

Rural Australia: Visit Australia's vast expanses, where farmers have been finding mutilated cattle. Plus, meet Phil Tindale who believes he witnessed two UFOs in combat. (S1, ep 6).

The Wild West: Allen Haff and Clinton 'Ton' Jones head to San Bernadino in search of a storage locker gold rush. Ton finds a 1880s gun, but it's only valuable if it fires. (S1, ep 1).

The Big Score: A money-making mission to downtown LA leads Ton and Allen to a copper cash till and a rare pistol. But will their finds bring them big profits? (S1, ep 2).

Nazi Menace: The quest continues in the Red Sea, a deeply personal journey given Ross' grandfather fought in the North Africa campaign during WWII. (S1, ep 3).

Singing Sands & Saudi Howling Cave: Strange sounds emanating from sand dunes in the Mongolian desert are investigated, while the ruins of a lost Roman city may have been found. (S1, ep 6).

Mega Hog: Do wild hogs in the US grow to monstrous sizes? Many think so. But are these creatures fattened up in a pen, or is there another way they have reached gigantic proportions.

Secrets Of The Tombs: Experts question the startling similarities in burial tombs from distant cultures, asking if aliens could have influenced their complicated designs. (S5, ep 1).

Prophets & Prophecies: Did prophets such as Elijah and Joseph Smith communicate with a heavenly source or did they actually come into contact with extraterrestrials? (S5, ep 2).

Werner Heisenberg: As one of their most controversial scientists, Heisenberg was key in the Nazis' efforts to build an atomic bomb. How close was he to achieving his goal? (S1, ep 3).

The Pacific (Part 2): Examine the European colonisation of the Pacific, with Spain first exploring the region and Britain and France following in the 18th and 19th centuries. (S2, ep 9).

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).

Roman Chester: Alice tells the story of Roman Britain by studying the history of Chester. She enjoys an authentic Roman feast and checks out an archaeological discovery. (1 of 6).

Beyond Nazca: Ancient alien theorists explore the mysterious phenomena of the Nazca Lines. Could these huge geoglyphs in Southern Peru have an extraterrestrial connection? (S5, ep 3).

Strange Abductions: Experts scrutinise The Bible for evidence of alien abductions. Could extraterrestrials have been kidnapping humans for thousands of years? (S5, ep 4).

Egypt's Elite: Using cutting-edge science, experts unravel the mysteries of Ancient Egypt's Elite, such as how Ramesses battled a biblical drought. (S2, ep 3).

Alien Engineering (Part 1 of 2): What would happen if a UFO did land on Earth and humans found it? Engineers create a 'spaceship' to see how alien technology could work. (S1, ep 14).

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).

Mark Twain National Forest: Some claim that the dark, mysterious energies that surround this national park point to treasures from a lost civilisation that are hidden there. (S2, ep 6).

Beyond Nazca: Ancient alien theorists explore the mysterious phenomena of the Nazca Lines. Could these huge geoglyphs in Southern Peru have an extraterrestrial connection? (S5, ep 3).

Strange Abductions: Experts scrutinise The Bible for evidence of alien abductions. Could extraterrestrials have been kidnapping humans for thousands of years? (S5, ep 4).

Witches: Can a site on the Lancashire-Yorkshire border shed more light on the Pendle Witch trials of 1612? (S1, ep 1).

Alien Engineering (Part 2 of 2): Laser weapons and tele-transporters would probably all be fitted to an alien spaceship, but what if they could be used by humans too? (S1, ep 15).

Mexico (Part 1): 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. (S2, ep 11).

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).

Viking York: Alice looks into the history of York, taking part in a Viking battle and examining an almost 1,000-year-old poo. (2 of 6).

Buried Below: The three-way hunt continues as the Dillmans, Hoaglands and Villescas carry out their expedition across Southwest America looking for the Seven Cities of Gold. (2 of 8).

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).

This July, 75 years have passed since the Roswell incident. This two-part documentary revisits the alleged crash of an extra terrestrial craft at Roswell, New Mexico in 1947. (1 of 2).

Architecture: Visit ancient architectural wonders and investigate how the Persians, Egyptians, Greeks and Romans accomplished their design and constructions without modern tools.

Thousands of UFO sightings and abductions are reported every year. This series examines these accounts and casts new light on historic cases. (S1, ep 1).

Deal or No Deal: Rogers' campaign begins with the offer of a pardon which Hornigold and Jennings accept. However, not all Nassau pirates agree. (S1, ep 5).

Beyond Nazca: Ancient alien theorists explore the mysterious phenomena of the Nazca Lines. Could these huge geoglyphs in Southern Peru have an extraterrestrial connection? (S5, ep 3).

Strange Abductions: Experts scrutinise The Bible for evidence of alien abductions. Could extraterrestrials have been kidnapping humans for thousands of years? (S5, ep 4).

Hans Kammler: Hans Kammler's fingerprints can be found all over the Third Reich's most prestigious and deadly engineering projects, including rockets and concentration camps. (S1, ep 4).

The Inca: Investigate the mighty Inca Empire and its accomplishments, including the construction of their awe-inspiring buildings in Cusco and Machu Picchu. (S2, ep 10).

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).

Viking York: Alice looks into the history of York, taking part in a Viking battle and examining an almost 1,000-year-old poo. (2 of 6).

Monoliths: A look at how ancient man could have built huge stone monoliths without advanced tools or technology. Could they have had extra-terrestrial help? (S5, ep 5).

Viking Gods: Ancient alien experts investigate the mysterious and fearsome Norse Gods. Were they divine? Or could the all-powerful Vikings have been guided by aliens? (S5, ep 6).

Witches: Can a site on the Lancashire-Yorkshire border shed more light on the Pendle Witch trials of 1612? (S1, ep 1).

Alien Engineering (Part 2 of 2): Laser weapons and tele-transporters would probably all be fitted to an alien spaceship, but what if they could be used by humans too? (S1, ep 15).

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).

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).

Monoliths: A look at how ancient man could have built huge stone monoliths without advanced tools or technology. Could they have had extra-terrestrial help? (S5, ep 5).

Viking Gods: Ancient alien experts investigate the mysterious and fearsome Norse Gods. Were they divine? Or could the all-powerful Vikings have been guided by aliens? (S5, ep 6).

Henry VIII: More clues to Henry VIII's life are unearthed as Helen Skelton and Alex Langlands join a new dig at one of nearly 60 royal residences owned by the monarch. (S1, ep 2).

Beyond The War Of The Worlds: HG Wells' classic tale of a Martian invasion has terrified audiences for more than 100 years. The history of its many retellings is revealed. (S1, ep 8).

Mexico (Part 2): Explore further a chronicle of conquest with bloody and dramatic consequences littered throughout Mexican history. (S2, ep 12).

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).

Norman Winchester: Alice tries some eel pie and investigates the origins of modern surgery as she explores the Norman period of British history by examining the town of Winchester. (3 of 6).

Spanish Death Trap: The families continue their epic adventure across seven cities of gold, as they journey Southwest America looking to break an age old curse. (3 of 8).

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).

Vietnam POW Escape: A German-American pilot, Dieter Dengler, uses survival skills honed as a child to escape a secret prison in Laos during the early years of the Vietnam war. (S2, ep 2).

Peter Easton's Plunder: Rick and Matty brave the waters of Newfoundland with diver Tony Sampson and a team to look for sunken treasure connected to the notorious pirate. (S2, ep 8).

Charles II: Professor Alice Roberts forensically investigates King Charles II's death, using research, medical expertise and dramatic recreation to reach a possible conclusion. (S1, ep 1).

Odysseus - Curse Of The Sea: Homer's The Odyssey is the most famous epic ever written - a story of a 20-year journey to return home from war. But could it actually have happened? (S1, ep 6).

Monoliths: A look at how ancient man could have built huge stone monoliths without advanced tools or technology. Could they have had extra-terrestrial help? (S5, ep 5).

Viking Gods: Ancient alien experts investigate the mysterious and fearsome Norse Gods. Were they divine? Or could the all-powerful Vikings have been guided by aliens? (S5, ep 6).

Ferdinand Porsche: The designer of one of the most popular car brands in history, Ferdinand Porsche would not have seen his success without the support of Adolf Hitler. (S1, ep 5).

Mexico (Part 1): 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. (S2, ep 11).

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).

Norman Winchester: Alice tries some eel pie and investigates the origins of modern surgery as she explores the Norman period of British history by examining the town of Winchester. (3 of 6).

Von Daniken Legacy: A look at the controversial ancient alien theories of Erich von Däniken, whose books have sold over 65 million copies worldwide. (S5, ep 7).

Emperors Kings And Pharoahs: Could ancient rulers have had otherworldly links? Experts examine whether history's most powerful leaders were 'chosen' and guided by aliens. (S5, ep 8).

Henry VIII: More clues to Henry VIII's life are unearthed as Helen Skelton and Alex Langlands join a new dig at one of nearly 60 royal residences owned by the monarch. (S1, ep 2).

Beyond The War Of The Worlds: HG Wells' classic tale of a Martian invasion has terrified audiences for more than 100 years. The history of its many retellings is revealed. (S1, 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).

Von Daniken Legacy: A look at the controversial ancient alien theories of Erich von Däniken, whose books have sold over 65 million copies worldwide. (S5, ep 7).

Emperors Kings And Pharoahs: Could ancient rulers have had otherworldly links? Experts examine whether history's most powerful leaders were 'chosen' and guided by aliens. (S5, ep 8).

Robin Hood: Helen and Alex head to Sherwood Forest, the home of Robin Hood, to discover if he ever truly existed. (S1, ep 3).

Brazil's Roswell: In 1977, a remote Brazilian island was visited nightly by strange flying objects, leaving people with bizarre puncture marks and blood loss. What happened? (S1, ep 10).

Mexican Revolution (Part 4): Explore the Mexican Revolution in the early part of the last century, including the roles of revolutionaries Pancho Villa and Emiliano Zapata. (S2, ep 14).

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).

Tudor Norwich: Alice experiences humiliating Tudor justice as she dives into the story of Tudor England by studying the history of Norwich. (4 of 6).

Weeping Cave: The families reach the halfway point on their epic journey across the seven cities of gold, as the treasure hunt for the infamous lost gold of the Aztecs rolls on. (4 of 8).

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).

Runes: During his time in charge, Himmler made the study of runes - letters of ancient Germanic writing - obligatory for SS officers in the belief they held powers. (S1, ep 6).

Last Call for Michael Malloy: The strange story of Michael Molly shows how some people just won't die when you want them to. (S1, ep 6).

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

Demonic Invasion, Angel of Death, Dead Man Rotting: A demon stalks two hospital workers, a nurse faces a terrifying reality, a married couple are overcome by the stench of death. (S1, ep 1).

Von Daniken Legacy: A look at the controversial ancient alien theories of Erich von Däniken, whose books have sold over 65 million copies worldwide. (S5, ep 7).

Emperors Kings And Pharoahs: Could ancient rulers have had otherworldly links? Experts examine whether history's most powerful leaders were 'chosen' and guided by aliens. (S5, ep 8).

Fritz Todt: Fritz Todt was the man tasked with engineering projects including the autobahn, the West Wall defences and more. But in 1942, he died under mysterious circumstances. (S1, ep 6).

Mexico (Part 2): Explore further a chronicle of conquest with bloody and dramatic consequences littered throughout Mexican history. (S2, ep 12).

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).

Tudor Norwich: Alice experiences humiliating Tudor justice as she dives into the story of Tudor England by studying the history of Norwich. (4 of 6).

Alien Operations: Experts investigate reports of bird-like figures that practised advanced medical science in ancient times. Could they have been extra-terrestrial? (S5, ep 9).

Mysterious Relics: Experts investigate mysterious relics that have been revered by cultures for millennia. Could these sacred items truly hold divine or otherworldly power? (S5, ep 10).

Robin Hood: Helen and Alex head to Sherwood Forest, the home of Robin Hood, to discover if he ever truly existed. (S1, ep 3).

Brazil's Roswell: In 1977, a remote Brazilian island was visited nightly by strange flying objects, leaving people with bizarre puncture marks and blood loss. What happened? (S1, ep 10).

Everglades National Park: A plane crash in the Everglades National Park leads to strange hauntings - and some believe the park may exert a dark, transformative power. (S1, ep 2).

Grand Canyon National Park: A strange series of events in Grand Canyon National Park leads researchers to speculate whether its power comes from forces that cannot be explained. (S1, ep 1).

Alien Operations: Experts investigate reports of bird-like figures that practised advanced medical science in ancient times. Could they have been extra-terrestrial? (S5, ep 9).

Mysterious Relics: Experts investigate mysterious relics that have been revered by cultures for millennia. Could these sacred items truly hold divine or otherworldly power? (S5, ep 10).

Dead Peasants: A site on the Welsh border containing almost 1,000 skeletons reveals secrets about life during the Black Death. (S1, ep 4).

China's Roswell: In 1938, hundreds of mysterious stone disks were found in a cave in China. Are these proof of contact with an alien race? (S1, ep 3).

Conquistadors, War and Revolution: Dive into the Spanish conquest of Mexico in the 16th century, resulting in 400 years of overlooked history in Latin America. (S2, ep 13).

Body Parts: The glassblowers waltz into the world of dance as they are challenged to pinch, pluck and perfect molten glass into a sculpture that shows the body in movement. (S1, ep 9).

Best in Blow: It all comes down to this. As the two finalists go head to head in a final challenge gallery showing, only one can be named champion and pocket the $60,000 prize. (S1, ep 10).

Regency Cheltenham: Alice studies the history of Cheltenham, Britain's most Regency town. She attends a period society ball, investigates the rigid social hierarchy and more. (5 of 6).

A Grave Discovery: The Villescas family talk with an expert about a spur they found. Meanwhile, the Dillmans use drones to locate an important ancient symbol. (5 of 8).

Venture to England's South Coast, as we dive with sharks, explore the battlements of Drake's Island, uncover the origins of Scouts, and discover fossils on the Isle of Wight. (4 of 4).

SS Atlantic: Uncover the story of the SS Atlantic's deadly 1873 crash through intriguing stories and 3D recreations of the wreck. (S1, ep 1).

The British Connection: Ross Kemp starts his journey under Blackfriars Bridge - the location of Britain's first mafia hit - before following the money trail across the UK. (S1, ep 1).

Darkness Falls: Documentary series highlighting what life was really like during the Second World War, featuring the personal stories of soldiers from both sides of the conflict. (1 of 10).

Greece: 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? (S2, ep 1).

Alien Operations: Experts investigate reports of bird-like figures that practised advanced medical science in ancient times. Could they have been extra-terrestrial? (S5, ep 9).

Mysterious Relics: Experts investigate mysterious relics that have been revered by cultures for millennia. Could these sacred items truly hold divine or otherworldly power? (S5, ep 10).

This July, 75 years have passed since the Roswell incident. This two-part documentary revisits the alleged crash of an extra terrestrial craft at Roswell, New Mexico in 1947. (1 of 2).

Mexican Revolution (Part 4): Explore the Mexican Revolution in the early part of the last century, including the roles of revolutionaries Pancho Villa and Emiliano Zapata. (S2, ep 14).

Body Parts: The glassblowers waltz into the world of dance as they are challenged to pinch, pluck and perfect molten glass into a sculpture that shows the body in movement. (S1, ep 9).

Best in Blow: It all comes down to this. As the two finalists go head to head in a final challenge gallery showing, only one can be named champion and pocket the $60,000 prize. (S1, ep 10).

Regency Cheltenham: Alice studies the history of Cheltenham, Britain's most Regency town. She attends a period society ball, investigates the rigid social hierarchy and more. (5 of 6).

Decoding the Cosmic Egg: Ancient Astronaut theorists examine the creation myth of \"The Cosmic Egg\", and look at why the concept is so pervasive throughout the world. (S9, ep 4).

Destination Mars: As we look forward to the first astronauts reaching Mars in the next 20 years, is there evidence to suggest human life was first seeded there? (S9, ep 5).

The Visionaries: Ancient Astronaut theorists suggest that aliens have been guiding mankind in secret to bring about huge leaps in technological advancement. (S9, ep 6).

The Desert Rats: Examining the machines used by the iconic military unit \"The Desert Rats\" in the North African desert campaign of World War 2. (S1, ep 2).

Nazi Railways: Series exploring the role of trains in the major conflicts of the past 150 years. Auschwitz survivors explore the railways' part in the Nazis' mass murder. (S1, ep 1).

We are at War: The German invasion of Poland starts and Jews face segregation. Mussolini allies with Hitler, Churchill is appointed UK PM and Germany invades France. (S1, ep 1).

Shall We Go On: Germany builds its empire in Europe, aiming to crush Britain with the Luftwaffe while France is conquered and divided as Churchill rejects peace. (S1, ep 2).

Call To Duty: The story of the World War II aircraft carrier USS Enterprise. Join her as she sets sail in the Pacific on a mission to sink enemy submarines. (S1, ep 1).

Vengeance At Midway: Amazing CGI graphics tell the story of how the USS Enterprise and sister carriers Yorktown and Hornet turned the tide of the Pacific battle during WWII. (S1, ep 2).

Secret Weapon Sabotage: An elite force of Norwegian resistance fighters return to their invaded homeland to carry out a daring mission. (S1, ep 1).

Cutting Rommel's Lifeline: On the outskirts of Bouerat Harbor in Libya, a small group of British special forces prepare to destroy a crucial German fuel depot. (S1, ep 2).

Architecture: Visit ancient architectural wonders and investigate how the Persians, Egyptians, Greeks and Romans accomplished their design and constructions without modern tools.

Thousands of UFO sightings and abductions are reported every year. This series examines these accounts and casts new light on historic cases. (S1, ep 1).

SS Atlantic: Uncover the story of the SS Atlantic's deadly 1873 crash through intriguing stories and 3D recreations of the wreck. (S1, ep 1).

The Stone Ball, the Electrocution Belt and the Cat Mummy that Wasn't: Uncovering the mystery of an ancient stone object with unique markings and a cat mummy with no cat inside. (S2, ep 1).

The End of all Things: Death is a frightening, unsettling prospect for us all. Myths and legends help explore those anxieties but they tell us about more than mortal fear alone. (S1, ep 6).

Last Call for Michael Malloy: The strange story of Michael Molly shows how some people just won't die when you want them to. (S1, ep 6).

Royalty: In the early 20th century, the British royal family fought for popularity. Rare film, seen in colour for the first time, tells the story of how they managed to survive. (S1, ep 1).

Decoding the Cosmic Egg: Ancient Astronaut theorists examine the creation myth of \"The Cosmic Egg\", and look at why the concept is so pervasive throughout the world. (S9, ep 4).

Destination Mars: As we look forward to the first astronauts reaching Mars in the next 20 years, is there evidence to suggest human life was first seeded there? (S9, ep 5).

The Visionaries: Ancient Astronaut theorists suggest that aliens have been guiding mankind in secret to bring about huge leaps in technological advancement. (S9, ep 6).

Charles II: Professor Alice Roberts forensically investigates King Charles II's death, using research, medical expertise and dramatic recreation to reach a possible conclusion. (S1, ep 1).

The British Connection: Ross Kemp starts his journey under Blackfriars Bridge - the location of Britain's first mafia hit - before following the money trail across the UK. (S1, ep 1).

By January 1945, it seemed the end of the war was in sight - but challenges still loomed on the Eastern Front, in the Pacific and in Western Europe. (1 of 8).

The Next Humans: As science turns towards augmenting humanity with technology, theorists suggest that we are merely following the path of our alien creators. (S9, ep 7).

The Wisdom Keepers: Ancient Astronaut theorists look at the Aborigine legend of Dreamtime, and ask if these stories hold the proof that aliens created life on Earth. (S9, ep 8).

The Mysterious Nine: Could claims of \"The Nine\" - a federation of extraterrestrial beings who monitor and influence mankind - have any credence? Experts believe so. (S9, ep 9).

A look at the first weeks of a war that would disrupt the lives of so many, starting with the first shots fired by the Japanese in July 1937, China. (S1, ep 1).

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

The Seeds of Violence 1918-1922: In the wake of the First World War, Adolf Hitler identifies Benito Mussolini as his model and has one ultimate goal: to gain power in Germany. (S1, ep 1).

Deceit and Delusion 1923-1928: Hitler appears to be eliminated after his failed putsch in 1923. Discover how the Nazi movement used democracy's tolerance in Germany to come back. (S1, ep 2).

The Battle of the Beaches: Retrace the 100 days of battle as the Allies liberated Normandy, broke through the German line and paved the way towards victory. (S1, ep 1 of 2).

The Normandy Campaign: Retrace the 100 days of battle as the Allies liberated Normandy, broke through the German line and paved the way towards victory. (S1, ep 2 of 2).

Part One: Hear about the personal rivalry between Winston Churchill and Adolf Hitler, exploring how their exploits in World War I shaped their future commands. (1 of 2).

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

Greece: 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? (S2, ep 1).

The Stone Ball, the Electrocution Belt and the Cat Mummy that Wasn't: Uncovering the mystery of an ancient stone object with unique markings and a cat mummy with no cat inside. (S2, ep 1).

Royalty: In the early 20th century, the British royal family fought for popularity. Rare film, seen in colour for the first time, tells the story of how they managed to survive. (S1, ep 1).

Mind Control: From the Cold War to the TV set, experts question whether the government is actively controlling what you think, how you act and what you believe. (S1, ep 3).

New World Order: Experts question if there really is an elite group of powerbrokers trying to rule the planet. And if so, who is behind this New World Order? (S1, ep 4).

The End of all Things: Death is a frightening, unsettling prospect for us all. Myths and legends help explore those anxieties but they tell us about more than mortal fear alone. (S1, ep 6).

Red Alert: During the Cold War, strange lights and unidentified objects put governments around the world on red alert. Could extra-terrestrials have been responsible? (2 of 6).

On a country Texas road in 1980, a diamond-shaped UFO melts a vehicle below. In 1967, a man in Manitoba encounters a flying disc and reports hearing voices inside. (S1, ep 3).

A Japanese airline crew in 1986 encounter two UFOs en route from Paris to Tokyo. In 1979, a man in Minnesota skids off the road after a mysterious beam of light engulfs his car. (S1, ep 4).

The Next Humans: As science turns towards augmenting humanity with technology, theorists suggest that we are merely following the path of our alien creators. (S9, ep 7).

The Wisdom Keepers: Ancient Astronaut theorists look at the Aborigine legend of Dreamtime, and ask if these stories hold the proof that aliens created life on Earth. (S9, ep 8).

The Mysterious Nine: Could claims of \"The Nine\" - a federation of extraterrestrial beings who monitor and influence mankind - have any credence? Experts believe so. (S9, ep 9).

Conquistadors, War and Revolution: Dive into the Spanish conquest of Mexico in the 16th century, resulting in 400 years of overlooked history in Latin America. (S2, ep 13).

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).

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).

Anunnaki Connection: Theorists search ancient texts for proof that extraterrestrials influenced the miraculous advances made by the Sumerian civilisation 5,000 years ago. (S5, ep 12).

Crystal Skulls: Experts explore the controversy surrounding the ancient Crystal Skulls, asking what powers might be unleashed if all 13 artefacts were brought together. (S5, ep 13).

Dead Peasants: A site on the Welsh border containing almost 1,000 skeletons reveals secrets about life during the Black Death. (S1, ep 4).

China's Roswell: In 1938, hundreds of mysterious stone disks were found in a cave in China. Are these proof of contact with an alien race? (S1, ep 3).

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).

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).

Anunnaki Connection: Theorists search ancient texts for proof that extraterrestrials influenced the miraculous advances made by the Sumerian civilisation 5,000 years ago. (S5, ep 12).

Crystal Skulls: Experts explore the controversy surrounding the ancient Crystal Skulls, asking what powers might be unleashed if all 13 artefacts were brought together. (S5, ep 13).

Stonehenge: As Alex Langlands examines the unique properties of the stones of Stonehenge, Helen Skelton visits the nearby village where its builders lived. (S1, ep 5).

Britain's Roswell: In December 1980, Air Force personnel witnessed strange lights hovering above the English countryside. Did they have a close encounter with alien spacecraft? (S1, ep 11).

A gas station camera captures a customer bursting into flames, an ancient statue spins in its locked cabinet, and a camera films an alien-like creature in the sewers. (S1, ep 1).

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).

Victorian Belfast: Alice reveals the history of Belfast, the UK's most Victorian city. She visits the shipyards that built the Titanic and gets locked up in the Crumlin Road gaol. (6 of 6).

A Hidden Chamber: As the three families enter the final throws of their adventure across the seven cities of gold, a hidden chamber stops them in their tracks. (6 of 8).

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).

Ton's Got a Gun: A bidding war results in a depression-era slot machine, a custom mini-bike and a 1880s Colt Peacemaker. But can Ton and Allen make their money back? (S1, ep 3).

Strat'ed for Cash: The guys head to a high-end auction, where they lay their hands on a rare Fender Stratocaster. Plus, can they turn a rusty 1936 Schwinn to riches? (S1, ep 4).

Nazi Menace: The quest continues in the Red Sea, a deeply personal journey given Ross' grandfather fought in the North Africa campaign during WWII. (S1, ep 3).

Seized by the Roman Legions: The team explore mystery cults and ancient catacombs to determine whether it's possible that the Ark of the Covenant was stolen and hidden in Rome. (S1, ep 1).