English Civil Wars - Naseby: Karl and Kevin explore how weapons and armour developed, starting with the 1645 Battle of Naseby during the English Civil War. (S1, ep 1).

The Power of Three: Experts investigate the power of the number three in history, science and astronomy. Could its huge significance bear links to extraterrestrial life? (S5, ep 14).

Magic of the Gods: Experts search ancient accounts of magic for evidence suggesting that the wizards and witches of yesteryear were given otherworldly knowledge by aliens. (S5, ep 15).

Aliens And Forbidden Islands: Experts investigate why so many UFOs have been spotted near remote islands. Could these far-removed spots be the earthly homes of aliens? (S6, ep 1).

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).

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).

Into the Mountains (Tibet): Himmler's belief in the theory that the Himalayas were home to the Nazis' Aryan ancestors leads to an SS mission to the mountains. (S1, 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 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 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 4).

The Power of Three: Experts investigate the power of the number three in history, science and astronomy. Could its huge significance bear links to extraterrestrial life? (S5, ep 14).

Magic of the Gods: Experts search ancient accounts of magic for evidence suggesting that the wizards and witches of yesteryear were given otherworldly knowledge by aliens. (S5, ep 15).

Viking Camp and Iron Age Gold: Dr Alice Roberts explores the most exciting finds from West Britain. Iron Age gold in Britain is unearthed and a Viking camp is discovered. (S6, ep 1).

Caesar And Shipwrecks: Dr Alice Roberts explores the biggest collection of Roman writing tablets. A fort scattered with human skulls provides evidence of Caesar's invasion. (S6, ep 2).

Vindolanda: Dr Alice Roberts joins a team of archaeologists as they attempt to restage a Roman cavalry tournament. (S6, ep 3).

Aliens And Forbidden Islands: Experts investigate why so many UFOs have been spotted near remote islands. Could these far-removed spots be the earthly homes of aliens? (S6, ep 1).

The Last Don: Discover how a more aggressive commitment by law enforcement to eradicate the mafia forced the families to get creative in order to stay out of jail. (S1, ep 3).

The Power of Three: Experts investigate the power of the number three in history, science and astronomy. Could its huge significance bear links to extraterrestrial life? (S5, ep 14).

Magic of the Gods: Experts search ancient accounts of magic for evidence suggesting that the wizards and witches of yesteryear were given otherworldly knowledge by aliens. (S5, ep 15).

Aliens And Forbidden Islands: Experts investigate why so many UFOs have been spotted near remote islands. Could these far-removed spots be the earthly homes of aliens? (S6, ep 1).

The Last Don: Discover how a more aggressive commitment by law enforcement to eradicate the mafia forced the families to get creative in order to stay out of jail. (S1, ep 3).

War of the Roses - Towton: Exploring the impact of the Battle of Towton during the War of the Roses, Karl and Kevin continue their look at how weapons and body armour developed. (S1, ep 2).

Battle of Hastings: Exploring the impact of the Battle of Hastings in 1066, Karl and Kevin continue their look at how weapons and body armour developed. (S1, ep 3).

The UFO Conspiracy: Following a 2017 public disclosure of secret government UFO investigations, are we any closer to proving there has been a UFO conspiracy? (S11, ep 1).

The Holy Grail: What is the Holy Grail? Coveted by everyone from Roman Emperors to Adolf Hitler, this sacred object is said to hold incredible powers. (S3, ep 6).

Stealing Hitler's Radar: An elite group of British paratroopers launch a midnight raid in order to capture Hitler's unusual radar equipment. (S1, ep 6).

Satellites orbiting our planet have put more eyes on Earth's vast, unexplored areas of land and sea - revealing baffling new anomalies. (S6, ep 20).

The UFO Conspiracy: Following a 2017 public disclosure of secret government UFO investigations, are we any closer to proving there has been a UFO conspiracy? (S11, ep 1).

English Civil Wars - Naseby: Karl and Kevin explore how weapons and armour developed, starting with the 1645 Battle of Naseby during the English Civil War. (S1, ep 1).

Stone Age Technology: Dr Alice Roberts uncovers some incredible finds from North Britain, including Scottish man-made islands that help paint a picture of Stone Age tech. (S5, ep 2).

Game of Queens: During the Renaissance, the king of France shakes up the foundations of Europe and claims the Scottish crown by marrying queen Mary Stuart to his son. (S2, ep 1).

Stealing Hitler's Radar: An elite group of British paratroopers launch a midnight raid in order to capture Hitler's unusual radar equipment. (S1, ep 6).

Edition. UFOs & Wormholes: Tony examines some of the most compelling evidence of UFOs and wormholes at the Bermuda Triangle and analyses similar discoveries across the globe. (S1, 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 5).

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 1).

Partners and Crime: Using explosives, weapons and cunning, Rédoine Faïd breaks out of prison and into fame twice, but then his gang murders a female police officer. (S1, ep 7).

Colombia: Ross sees just how prevalent cocaine is in Colombia as he joins an army raid, before meeting the son of Gilberto Rodriguez - a founder of the Cali Cartel. (S1, ep 3).

The Holy Grail: What is the Holy Grail? Coveted by everyone from Roman Emperors to Adolf Hitler, this sacred object is said to hold incredible powers. (S3, ep 6).

Part Two: The World War II killings carried out by the Nazis on Alderney represent the worst mass murder in British history - yet no one has been brought to justice. (2 of 2).

The UFO Conspiracy: Following a 2017 public disclosure of secret government UFO investigations, are we any closer to proving there has been a UFO conspiracy? (S11, ep 1).

The Horsemen of Hadrian's Wall: Dr Alice Roberts reveals the forgotten story of the Roman Army's cavalry as she journeys across Hadrian's Wall. (S6, ep 4).

Battle of Waterloo: What was it like to face a Napoleonic cavalry charge? Find out as the cannon, grenade and Brown Bess musket go under the microscope. (S1, ep 6).

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 1).

Edition. UFOs & Wormholes: Tony examines some of the most compelling evidence of UFOs and wormholes at the Bermuda Triangle and analyses similar discoveries across the globe. (S1, ep 6).

The Alien Protocols: In 2017, a strange, cigar-shaped object enters the solar system, causing some astronomers to suggest that it could be an extraterrestrial craft. (S11, ep 3).

Earth's Black Holes: Theorists speculate about the existence of black holes on Earth, which may explain strange disappearances and other inexplicable phenomena. (S11, ep 4).

Malaysia Flight 370: In one of the most chilling modern day mysteries, a plane carrying hundreds vanishes over the ocean. Nearly a decade later, there are still no answers. (S3, ep 7).

Lost & Confused - Sharp Top Mountain B-25 Crash: Garth Barnard investigates World War II air accidents, starting with a B-25 training crash in Virginia that killed five crew. (S1, 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).

The Alien Protocols: In 2017, a strange, cigar-shaped object enters the solar system, causing some astronomers to suggest that it could be an extraterrestrial craft. (S11, ep 3).

Earth's Black Holes: Theorists speculate about the existence of black holes on Earth, which may explain strange disappearances and other inexplicable phenomena. (S11, ep 4).

War of the Roses - Towton: Exploring the impact of the Battle of Towton during the War of the Roses, Karl and Kevin continue their look at how weapons and body armour developed. (S1, ep 2).

Vindolanda And WWII Spitfire: The team search for remains of the crashed WWII Spitfire and discover parts of the cockpit. (1 of 4).

In the Name of God 1559-1564: While celebrating an alliance treaty, Henry II dies during a jousting tournament. In Spain, Philip II allies himself with the French by marriage. (S2, ep 2).

Lost & Confused - Sharp Top Mountain B-25 Crash: Garth Barnard investigates World War II air accidents, starting with a B-25 training crash in Virginia that killed five crew. (S1, ep 1).

What really happened to a Desert Storm fighter pilot who went missing after being shot down in Iraq? Veterans Rudy Reyes and Ronnie Adkins break down the evidence. (S2, 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 6).

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 2).

The Men Who Gave the Orders: Explore the men in charge whose rampant egos and misguided belief in their own abilities led to their country making fatal mistakes in the war. (S1, ep 1).

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

Malaysia Flight 370: In one of the most chilling modern day mysteries, a plane carrying hundreds vanishes over the ocean. Nearly a decade later, there are still no answers. (S3, ep 7).

Cro Magnon: Himmler's desire to unearth the true origins of humanity led to an attempt to prove the Paleolithic past of Germany's Aryan race. (S1, ep 5).

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).

Earth's Black Holes: Theorists speculate about the existence of black holes on Earth, which may explain strange disappearances and other inexplicable phenomena. (S11, ep 4).

Vindolanda And WWII Spitfire: The team search for remains of the crashed WWII Spitfire and discover parts of the cockpit. (1 of 4).

Game of Queens: During the Renaissance, the king of France shakes up the foundations of Europe and claims the Scottish crown by marrying queen Mary Stuart to his son. (S2, 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 2).

What really happened to a Desert Storm fighter pilot who went missing after being shot down in Iraq? Veterans Rudy Reyes and Ronnie Adkins break down the evidence. (S2, ep 1).

The Desert Codes: Researchers study giant ancient drawings found etched into the desert floor, which may be a part of an ancient alien code. (S11, ep 5).

Area 52: Could Area 51's notoriety act as a cover up to much bigger, top-secret extraterrestrial experiments taking place at multiple locations? (S11, ep 6).

The Sodder Children Disappearance: On Christmas morning 1945, five siblings vanish from their family home in West Virginia as a fire blazes. What happened is still a mystery. (S3, ep 8).

Sikorski's Last Flight: Explore the complex case of the death of Wladyslaw Sikorski, the Polish PM whose plane crashed soon after taking off in 1943. (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 2).

The Desert Codes: Researchers study giant ancient drawings found etched into the desert floor, which may be a part of an ancient alien code. (S11, ep 5).

Area 52: Could Area 51's notoriety act as a cover up to much bigger, top-secret extraterrestrial experiments taking place at multiple locations? (S11, ep 6).

Battle of Hastings: Exploring the impact of the Battle of Hastings in 1066, Karl and Kevin continue their look at how weapons and body armour developed. (S1, ep 3).

Roman Bathhouse and Hessian Camp: Alice Roberts shares archaeological discoveries from the west of the UK, including a Roman bath house and a German camp. (2 of 4).

Europe Ignites 1561-1569: In France, the kingdom is plunged into chaos. Catherine de Medici rules behind new king Charles IX, but is unable to prevent a civil war. (S2, ep 3).

Sikorski's Last Flight: Explore the complex case of the death of Wladyslaw Sikorski, the Polish PM whose plane crashed soon after taking off in 1943. (S1, ep 2).

Veterans Rudy Reyes and Ronnie Adkins break down the evidence behind the most mysterious photos, films and recordings in battlefield history. (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 8).

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 3).

Fleeing Parchman: A prisoner with a love of crime novels becomes the star of his own story when he escapes from Mississippi's notorious Parchman Penitentiary. (S2, ep 1).

Blood Wedding 1567-1574: In Paris, Catherine de Medici weds her Catholic daughter, Margaret of Valois to the future Henry IV. (S2, ep 4).

The Sodder Children Disappearance: On Christmas morning 1945, five siblings vanish from their family home in West Virginia as a fire blazes. What happened is still a mystery. (S3, ep 8).

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 Desert Codes: Researchers study giant ancient drawings found etched into the desert floor, which may be a part of an ancient alien code. (S11, ep 5).

Area 52: Could Area 51's notoriety act as a cover up to much bigger, top-secret extraterrestrial experiments taking place at multiple locations? (S11, ep 6).

Roman Bathhouse and Hessian Camp: Alice Roberts shares archaeological discoveries from the west of the UK, including a Roman bath house and a German camp. (2 of 4).

In the Name of God 1559-1564: While celebrating an alliance treaty, Henry II dies during a jousting tournament. In Spain, Philip II allies himself with the French by marriage. (S2, 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 3).

Veterans Rudy Reyes and Ronnie Adkins break down the evidence behind the most mysterious photos, films and recordings in battlefield history. (S1, ep 2).

Island of the Giants: Oak Island treasure hunter Marty Lagina and Ancient Astronaut theorist Giorgio A. Tsoukalos explore the ancient ruins of Sardinia, Italy. (S11, ep 7).

The Sentinels: Seven stone giants stand guard over a Pacific island. But what are they protecting? And from whom? (S11, ep 9).

The Voynich Manuscript: A look into a medieval manuscript filled with drawings and secret code, that has perplexed everyone from scholars to conspiracy theorists. (S3, ep 9).

Bakers Creek - Australia's Worst Crash: Australia's worst aviation accident happened in 1943 when 40 crew died in a B-17 bomber crash. (S1, 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 3).

Island of the Giants: Oak Island treasure hunter Marty Lagina and Ancient Astronaut theorist Giorgio A. Tsoukalos explore the ancient ruins of Sardinia, Italy. (S11, ep 7).

The Sentinels: Seven stone giants stand guard over a Pacific island. But what are they protecting? And from whom? (S11, ep 9).

The Great War - the Somme: Presenter Karl Ude-Martinez takes a tour of the weapons used during the Battle of the Somme in 1916, including machine guns and poison gas. (S1, ep 4).

Stone Age Engineering and Battle of Bullecourt: Finds from the East include a monument as old as Stonehenge and some disturbing Roman burials. (3 of 4).

Blood Wedding 1567-1574: In Paris, Catherine de Medici weds her Catholic daughter, Margaret of Valois to the future Henry IV. (S2, ep 4).

Bakers Creek - Australia's Worst Crash: Australia's worst aviation accident happened in 1943 when 40 crew died in a B-17 bomber crash. (S1, ep 3).

An American Korean War pilot is shot down and declared dead, but he could have been taken prisoner by the Soviets. (S1, 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 9).

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).

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).

Holy Riches: The legendary treasures of the Copper Scroll, King Solomon's mines and the Syamantaka Gem. (S1, ep 5).

The Voynich Manuscript: A look into a medieval manuscript filled with drawings and secret code, that has perplexed everyone from scholars to conspiracy theorists. (S3, ep 9).

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. (2 of 2).

Island of the Giants: Oak Island treasure hunter Marty Lagina and Ancient Astronaut theorist Giorgio A. Tsoukalos explore the ancient ruins of Sardinia, Italy. (S11, ep 7).

The Sentinels: Seven stone giants stand guard over a Pacific island. But what are they protecting? And from whom? (S11, ep 9).

Stone Age Engineering and Battle of Bullecourt: Finds from the East include a monument as old as Stonehenge and some disturbing Roman burials. (3 of 4).

Europe Ignites 1561-1569: In France, the kingdom is plunged into chaos. Catherine de Medici rules behind new king Charles IX, but is unable to prevent a civil war. (S2, 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 4).

An American Korean War pilot is shot down and declared dead, but he could have been taken prisoner by the Soviets. (S1, ep 3).

Russia Declassified: Have the US and Russia been working together from the beginning of the Space Race in preparation for the ultimate extraterrestrial encounter? (S11, ep 10).

They Came from the Sky: Ancient Astronaut theorists explore the idea that meteorites could be pieces of extraterrestrial technology. (S11, ep 11).

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

The Turweston Crash - Death in the Moonlight: In 1944, two Wellington bombers collided in mid-air over Northants. Garth Barnard investigates why 13 young trainees perished. (S1, 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 4).

Russia Declassified: Have the US and Russia been working together from the beginning of the Space Race in preparation for the ultimate extraterrestrial encounter? (S11, ep 10).

They Came from the Sky: Ancient Astronaut theorists explore the idea that meteorites could be pieces of extraterrestrial technology. (S11, ep 11).

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).

Iron Age Chariot: Alice Roberts follows archaeologists as they excavate Iron Age Britain's most spectacular grave - a Yorkshire chariot burial. (4 of 4).

Enemy Brothers 1575-1584: Mary, Queen of Scots is imprisoned by Queen Elizabeth in England. William I fights Philip II with help from the military. (S2, ep 5).

The Turweston Crash - Death in the Moonlight: In 1944, two Wellington bombers collided in mid-air over Northants. Garth Barnard investigates why 13 young trainees perished. (S1, ep 4).

Analyzing if a Korean soldier captured during D-Day fighting for the Nazis was the most captured person in the history of war. (S1, 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 10).

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).

In 1923, Adolf Hitler led the infamous Beer Hall Putsch, an attempt to take power in Germany by force. It was a day that would change the world forever, birthing Hitler's regime.

Hell's Agents: Agents Jay Dobyns and Jenna Maguire go undercover to infiltrate the Hells Angels - but the dream of being a fully patched member pushes Jay to the edge. (S1, ep 1).

Jack the Ripper: A spree of gruesome murders by Jack the Ripper shocks Victorian England. To this day, the vicious killer's identity remains a mystery. (S3, ep 10).

Pray for Mercy: The witch trials are suddenly halted when the Massachusetts elite are accused of witchcraft. As the prisoners are freed, Salem must deal with the aftermath. (4 of 4).

Russia Declassified: Have the US and Russia been working together from the beginning of the Space Race in preparation for the ultimate extraterrestrial encounter? (S11, ep 10).

They Came from the Sky: Ancient Astronaut theorists explore the idea that meteorites could be pieces of extraterrestrial technology. (S11, ep 11).

Iron Age Chariot: Alice Roberts follows archaeologists as they excavate Iron Age Britain's most spectacular grave - a Yorkshire chariot burial. (4 of 4).

Blood Wedding 1567-1574: In Paris, Catherine de Medici weds her Catholic daughter, Margaret of Valois to the future Henry IV. (S2, 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).

Analyzing if a Korean soldier captured during D-Day fighting for the Nazis was the most captured person in the history of war. (S1, ep 4).

Aliens And The Lost Ark: Theorists investigate whether sought-after religious relic the Ark of the Covenant could hold connections to our extraterrestrial past. (S6, ep 2).

Aliens And Mysterious Mountains: Throughout time, people have believed mountains were the home of the divine. But could these hilltop spirits have been extraterrestrials? (S6, ep 3).

Aliens In America: Experts investigate strange carvings from 8,000 BC and unexplained sightings in the New World. Is there more to the US's past than history books suggest? (S6, ep 4).

Gods and Monsters: An exploration into the origins of humans' complex and fascinating relationship with the skies, from the earliest ancestors to the birth of science. (S1, ep 1).

Finding the Center: From flat earth legends to Galileo's telescope, explore the major changes in humans' scientific understanding of planet Earth throughout history. (S1, ep 2).

Our Place in the Universe: Discover the key role scientific pioneers played in reshaping our solar system. Plus, learn how technology helped humans explore its furthest reaches. (S1, ep 3).

Aliens And The Lost Ark: Theorists investigate whether sought-after religious relic the Ark of the Covenant could hold connections to our extraterrestrial past. (S6, ep 2).

Aliens And Mysterious Mountains: Throughout time, people have believed mountains were the home of the divine. But could these hilltop spirits have been extraterrestrials? (S6, 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 6).

The Men Who Gave the Orders: Explore the men in charge whose rampant egos and misguided belief in their own abilities led to their country making fatal mistakes in the war. (S1, ep 1).

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

The Search For Volcanic Brown: Volcanic Brown is the most credible link to gold in the upper pit. Dig into the prospector's story, why he went missing and what he may have found. (S1, ep 3).

Barnum Museum: The world's greatest showman, a rumoured valley of gold and a fortress of protection - their legends prove fame, wealth and even safety can come at a dire cost. (S1, ep 4).

Time and a Half: Correctional officer Kay Beeman feigns being a hostage to facilitate her inmate boyfriend's escape. Their recapture would take months. (S1, ep 8).

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

Female Fuhrers: A look at the women who surrounded Hitler after he came to power and how they were held up as an Aryan ideal for German society to strive for. (S1, ep 1).

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

Aliens And The Lost Ark: Theorists investigate whether sought-after religious relic the Ark of the Covenant could hold connections to our extraterrestrial past. (S6, ep 2).

Aliens And Mysterious Mountains: Throughout time, people have believed mountains were the home of the divine. But could these hilltop spirits have been extraterrestrials? (S6, ep 3).

Aliens In America: Experts investigate strange carvings from 8,000 BC and unexplained sightings in the New World. Is there more to the US's past than history books suggest? (S6, ep 4).

The Medieval Tower: The Tower of London opens up for an access all areas look at one of the most incredible historical sites in the world. (1 of 4).

The Tudor Tower: A new recruit joins the team and begins his career as a Beefeater with some testing exams. The Chief Curator reveals the history of Anne Boleyn within the walls. (2 of 4).

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 Men Who Gave the Orders: Explore the men in charge whose rampant egos and misguided belief in their own abilities led to their country making fatal mistakes in the war. (S1, ep 1).

Aliens And Stargates: Experts investigate remote ruins, mysterious caves and legendary mountain portals. Could these alleged stargates have brought ancient aliens to Earth? (S6, ep 5).

The Star Children: Experts comb history for evidence of children with strange abilities and great knowledge. Could these young people have been born from ancient aliens? (S6, ep 6).

Treasures Of The Gods: Across the world, there are stories of treasures that have been lost for centuries. Could these ancient relics have been hidden by extraterrestrials? (S6, 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. (2 of 2).

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).

Cro Magnon: Himmler's desire to unearth the true origins of humanity led to an attempt to prove the Paleolithic past of Germany's Aryan race. (S1, 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 8).

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 9).

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 10).

Aliens And Stargates: Experts investigate remote ruins, mysterious caves and legendary mountain portals. Could these alleged stargates have brought ancient aliens to Earth? (S6, ep 5).

The Star Children: Experts comb history for evidence of children with strange abilities and great knowledge. Could these young people have been born from ancient aliens? (S6, ep 6).

Stealing Hitler's Radar: An elite group of British paratroopers launch a midnight raid in order to capture Hitler's unusual radar equipment. (S1, ep 6).

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).

Treasures Of The Gods: Across the world, there are stories of treasures that have been lost for centuries. Could these ancient relics have been hidden by extraterrestrials? (S6, ep 7).

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).

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).

Aliens And Stargates: Experts investigate remote ruins, mysterious caves and legendary mountain portals. Could these alleged stargates have brought ancient aliens to Earth? (S6, ep 5).

The Star Children: Experts comb history for evidence of children with strange abilities and great knowledge. Could these young people have been born from ancient aliens? (S6, ep 6).

Treasures Of The Gods: Across the world, there are stories of treasures that have been lost for centuries. Could these ancient relics have been hidden by extraterrestrials? (S6, ep 7).

Inside the Tower of London: A look at an extraordinary display of nearly 900,000 ceramic poppies in the moat. Also, Curator Bridget explores a reminder of the horrors of war. (S1, ep 3).

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).

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. (2 of 2).

In 1923, Adolf Hitler led the infamous Beer Hall Putsch, an attempt to take power in Germany by force. It was a day that would change the world forever, birthing Hitler's regime.

Earth Station Egypt: Ancient Astronaut theorist Giorgio A. Tsoukalos explores the latest evidence that suggests extraterrestrials visited Egypt in the distant past. (S11, ep 12).

The Lindbergh Baby Kidnapping: A media storm explodes when the infant son of an aviation legend is kidnapped and sparks a nationwide manhunt. (S3, ep 11).

Naper 28 - Death on the Great Plains: Garth Barnard fact-finds to determine the cause of a terrible accident in Nebraska in 1944, when a plane crashed during a violent storm. (S1, 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 5).

Earth Station Egypt: Ancient Astronaut theorist Giorgio A. Tsoukalos explores the latest evidence that suggests extraterrestrials visited Egypt in the distant past. (S11, ep 12).

Battle of Waterloo: What was it like to face a Napoleonic cavalry charge? Find out as the cannon, grenade and Brown Bess musket go under the microscope. (S1, ep 6).

East: Alice Roberts tours the East of England, seeking out the biggest archaeological digs of the year and witnessing the uncovering of a hugely significant Roman mosaic. (S9, ep 1).

The Last of the Valois 1584-1594: Henry III of France still has no heir, Elizabeth orders the death of a rival and Spain declares war on England over control of Europe. (S2, ep 6).

Naper 28 - Death on the Great Plains: Garth Barnard fact-finds to determine the cause of a terrible accident in Nebraska in 1944, when a plane crashed during a violent storm. (S1, ep 5).

Veterans Rudy Reyes and Ronnie Adkins uncover the truth behind Cold War secrets, WW2's Night Witches and mysterious battlefield photos and recordings. (S1, 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 11).

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 6).

Time and a Half: Correctional officer Kay Beeman feigns being a hostage to facilitate her inmate boyfriend's escape. Their recapture would take months. (S1, ep 8).

The Costa Del Crime: When a century-old extradition treaty between Britain and Spain ended in 1978, the Spanish Coast became a safe haven for the mafia and criminal masterminds. (S1, ep 4).

The Lindbergh Baby Kidnapping: A media storm explodes when the infant son of an aviation legend is kidnapped and sparks a nationwide manhunt. (S3, ep 11).

The Siege of Paris by the Vikings: Journey back to 885, when a small army in Paris repelled the Vikings, who had ravaged everything in their path while travelling up the Seine. (S1, ep 1).

Earth Station Egypt: Ancient Astronaut theorist Giorgio A. Tsoukalos explores the latest evidence that suggests extraterrestrials visited Egypt in the distant past. (S11, ep 12).

East: Alice Roberts tours the East of England, seeking out the biggest archaeological digs of the year and witnessing the uncovering of a hugely significant Roman mosaic. (S9, ep 1).

Enemy Brothers 1575-1584: Mary, Queen of Scots is imprisoned by Queen Elizabeth in England. William I fights Philip II with help from the military. (S2, ep 5).

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 6).

Veterans Rudy Reyes and Ronnie Adkins uncover the truth behind Cold War secrets, WW2's Night Witches and mysterious battlefield photos and recordings. (S1, ep 5).

Return To Mars: As humanity prepares to establish colonies beyond Earth, are we pursuing a new future for mankind or returning to its extraterrestrial past? (S11, ep 14).

The Chicago Tylenol Murders: Cyanide-tainted Tylenol capsules links the victims of a series of unexplained deaths in the 80s together. To this day, what happened is a mystery. (S3, ep 12).

Conspiracy or Confusion? The Duke of Kent Crash: Controversial royal Prince George perished in a plane crash in 1942. Was a pilot error or sabotage to blame? (S1, 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 6).

Return To Mars: As humanity prepares to establish colonies beyond Earth, are we pursuing a new future for mankind or returning to its extraterrestrial past? (S11, ep 14).

Holy City, Holy Grail: Two former soldiers open an investigation into the mysterious order of the Knights Templar, beginning in the holy city of Jerusalem. (S1, ep 1).

South: The south of England offers rich pickings, including the earliest money made in Britain and a massive haul of Roman treasure. (S9, ep 2).

Moving Mountains: Series exploring how many of today's greatest technological achievements were actually developed hundreds of years ago. (S1, ep 1).

Conspiracy or Confusion? The Duke of Kent Crash: Controversial royal Prince George perished in a plane crash in 1942. Was a pilot error or sabotage to blame? (S1, ep 6).

Veterans Rudy and Ronnie reveal the truth behind a nuclear sub sinking, WW2 bomber explosion, Goldsboro near-catastrophe, and a Vietnam disaster. (S1, 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 12).

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 7).

The Best Laid Plans: Explore how the seeds of Japan's defeat in 1945 were sown a decade earlier with the occupation of Manchuria in China. (S1, ep 2).

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).

The Chicago Tylenol Murders: Cyanide-tainted Tylenol capsules links the victims of a series of unexplained deaths in the 80s together. To this day, what happened is a mystery. (S3, ep 12).