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

A palm reader predicts that the guys will have a productive visit to Quebec, but one reluctant dealer could spoil their plans.

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

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

On 19 August 1987, Michael Ryan went on a bloody rampage in the village of Hungerford. Ryan shot and killed 16 people, and his crime would change the face of Britain.

The story of Yorkshire Ripper Peter Sutcliffe, who murdered 13 women during a five-year killing spree that began in 1975.

While the allies aim to end Hitler's domination of Western Europe, British troops are secretly being trained for an enormous, amphibious operation.

In June 1944, the Allied armada launches an assault on the Normandy coast, with soldiers charging in successive waves on a successful and historic day.

Humans are found to have lived in Britain earlier than thought when tools are unearthed in Norfolk, while some of our ancestors' customs are revealed at another dig.

Win Every War. Germany: Al joins forces with German comedian Henning Wehn to delve deeper into the truth behind some World War II myths.

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

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

The First Barbarian War: Follow the story of General Marius, who transformed the Roman army and sent shock waves through Rome by offering dictatorship or annihilation.

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

Roman emperor Titus plans 100 days of games to commemorate the Colosseum's completion in 80 AD, including a fight to the death between Priscus and Verus.

The eight year-old's disappearance and murder shocked the nation. Here, Sarah's mum reveals her tireless campaign to protect other children from paedophilia.

Roman emperor Titus plans 100 days of games to commemorate the Colosseum's completion in 80 AD, including a fight to the death between Priscus and Verus.

From secret nuclear programs to hidden Cold War bunkers, we uncover the surprising people and places behind top-secret discoveries.

Venus: Earth's Evil Twin: Earth's neighbour has volcanoes, clouds of acid rain and a surface temperature hot enough to melt lead - so is Venus our evil twin.

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

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

The eight year-old's disappearance and murder shocked the nation. Here, Sarah's mum reveals her tireless campaign to protect other children from paedophilia.

Genocide 1942-1944: Along with Treblinka and Majdanek, Sobibor was one of the camps used in Operation Reinhard, in which the Nazis murdered almost two million people.

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

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.

A Turkish drought reveals a long-lost Basilica and its secrets, while the hull of a ship in the North Sea answers decades-old questions.

Experts scrutinise The Bible for evidence of alien abductions. Could extraterrestrials have been kidnapping humans for thousands of years.

A look at how ancient man could have built huge stone monoliths without advanced tools or technology. Could they have had extra-terrestrial help.

Doctor Harold Shipman was convicted of killing 15 patients in 2000, but he is thought to have killed up to 215. Discover how he was eventually caught by detectives.

Bludgeoned to death whilst walking down a country lane, the horrific murders of Lin and Megan Russell made worldwide news. Discover the events of that shocking day.

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.

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.

In Northumbria, skeletons tell tales of violent death and tenderness, and people curate grave goods in an amazing community project.

An awe-inspiring year of archaeological digs with Dr Alice Roberts. Roman finds include an amazing coin hoard and a man buried on a pile of dead animals.

Experts scrutinise The Bible for evidence of alien abductions. Could extraterrestrials have been kidnapping humans for thousands of years.

A look at how ancient man could have built huge stone monoliths without advanced tools or technology. Could they have had extra-terrestrial help.

Julius Caesar: As the Roman Republic churns with civil war, Julius Caesar, desperate for fame and honour, embarks on a brutal campaign to annex Gaul and build his own reputation.

The Forest Of Death: As the Roman Empire expands its reaches into what is now Germany, its legions are faced with ferocious Germanic tribesmen.

Enslaved by the Romans, Carpophorus gets trained to fight beasts in the Colosseum for the public's amusement.

Police and witnesses reflect on David Copeland's nail bomb terror in 1999. Blasts in Soho, Brixton and Brick Lane killed three and injured over 100.

Emperor Domitian tasks master builder Haterius with constructing a labyrinth underneath the Colosseum floor.

Uncover haunting factors and new evidence, possibly leading to fresh verdicts for these enigmatic men.

The dark tale of the skeleton of a woman found in a hollowed-out tree in Birmingham woodland, exploring the links between her and Nazi spy rings.

Experts scrutinise The Bible for evidence of alien abductions. Could extraterrestrials have been kidnapping humans for thousands of years.

A look at how ancient man could have built huge stone monoliths without advanced tools or technology. Could they have had extra-terrestrial help.

Police and witnesses reflect on David Copeland's nail bomb terror in 1999. Blasts in Soho, Brixton and Brick Lane killed three and injured over 100.

Armageddon 1943-1945: The defeat at Stalingrad in 1943 was the turning point of the war and convinced the Nazi leadership to intensify their terror and propaganda campaigns.

War Beneath The Waves: From early beginnings in the American War of Independence to modern day, this is the story of the submarine and its role in naval warfare.

Examine how conflict has reshaped nations and devastated generations. Wars dominate history but the reasons for them starting are constantly disputed.

Rick and Beau embark on an epic search through the River Ouse in Yorkshire, in a bid to find evidence of Viking life.

Could ghosts and angels be visitors from other-worldly realms? A team of ancient alien theorists explores.

Could Hawaii's islands have once been inhabited by extraterrestrials? Experts investigate whether its volcanoes provide a portal between space and time.

The story of Yorkshire Ripper Peter Sutcliffe, who murdered 13 women during a five-year killing spree that began in 1975.

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

Up in Flames 1936-1940: At the end of 1939, the German Army invades Poland. Examine how Hitler succeeded in pushing through his rearmament and war plans relatively unhindered.

Could ghosts and angels be visitors from other-worldly realms? A team of ancient alien theorists explores.

Could Hawaii's islands have once been inhabited by extraterrestrials? Experts investigate whether its volcanoes provide a portal between space and time.

Dr Alice Roberts visits excavations in Orkney and York on the hunt for Viking relics. Finds include an amazing collection of silver and gold.

Dr Alice Roberts discovers what Britain was like before the Romans as she examines fascinating finds from the Bronze and Iron Ages.

Alice Roberts learns more about mankind's Stone Age ancestors, and travels to Jersey to meet a team hoping to shed new light on the Neanderthals.

Alice Roberts and Matt Williams present more outstanding archaeology. In the east of Britain, sites include Must Farm, Colchester, Oakington, Lyminge and Silchester.

Alice Roberts and Matt Williams visit the Dorset Country Museum, where they explore finds from archaeological digs across the west of Britain.

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

Documentary examining the unsolved murder of TV presenter and newsreader Jill Dando, who was shot outside her house in Fulham, London, in 1999.

When humanity vanishes, the vast infrastructure underground, from subways and pipelines in the United States, begins to unravel.

Tony Harris separates fact from fiction as he investigates photos, videos and sounds that allegedly have a link to Satan.

Chaos ensues when the wheels literally come off a vehicle going full speed.

Could ghosts and angels be visitors from other-worldly realms? A team of ancient alien theorists explores.

Could Hawaii's islands have once been inhabited by extraterrestrials? Experts investigate whether its volcanoes provide a portal between space and time.

Documentary examining the unsolved murder of TV presenter and newsreader Jill Dando, who was shot outside her house in Fulham, London, in 1999.

An awe-inspiring year of archaeological digs with Dr Alice Roberts. Roman finds include an amazing coin hoard and a man buried on a pile of dead animals.

Humans are found to have lived in Britain earlier than thought when tools are unearthed in Norfolk, while some of our ancestors' customs are revealed at another dig.

In Northumbria, skeletons tell tales of violent death and tenderness, and people curate grave goods in an amazing community project.

An eccentric seller in North Bay attaches his collection to the outside of his home and Brooke and Jerry hold their first sale at the Warehouse.

Experts check out structures built to mirror the constellations. Could they have been built as a message to extraterrestrials.

Ever since the first atomic bomb went off in 1945, UFOs have been spotted at nuclear facilities across the world. Could this signal a threat to mankind.

Bludgeoned to death whilst walking down a country lane, the horrific murders of Lin and Megan Russell made worldwide news. Discover the events of that shocking day.

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

The Gates of Hell 1941-1942: In the shadow of the war, the Nazi regime gradually advances its "final solution to the Jewish problem", culminating in the Holocaust.

Experts check out structures built to mirror the constellations. Could they have been built as a message to extraterrestrials.

Ever since the first atomic bomb went off in 1945, UFOs have been spotted at nuclear facilities across the world. Could this signal a threat to mankind.

The troubled beginnings and amazing exploits of the legendary British heavy bomber. Plus, see a replica up close.

A look at the later, clipped wing version flown by Czech refugee pilots in the UK during World War II. Plus, a tour of a restored example.

The Luftwaffe's Frontline Fighter: The astonishing story of the 109 and its modified variants, best known for its role in the Battle of Britain.

Superfortress: The story of the prolonged development and the initially troubled operational history of the Boeing B29 Superfortress.

Germany's Frontline Bomber: A look at one of the most-recognised German aircrafts of WWII and how it became a guinea pig for future bombers.

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

In an emotional tribute, witnesses and victims' relatives look back on the murder of 16 children and a teacher at Dunblane Primary School in March 1996.

Hidden In Plain Sight 1935-1938: In 1934, Hitler's government is firmly in the saddle. Most Germans support Hitler's anti-Jewish policy and the regime's terror soon escalates.

Venus: Earth's Evil Twin: Earth's neighbour has volcanoes, clouds of acid rain and a surface temperature hot enough to melt lead - so is Venus our evil twin.

In 2012, the remains of King Richard III were discovered, offering unprecedented insight into the last moments of England's controversial monarch.

Experts check out structures built to mirror the constellations. Could they have been built as a message to extraterrestrials.

Ever since the first atomic bomb went off in 1945, UFOs have been spotted at nuclear facilities across the world. Could this signal a threat to mankind.

In an emotional tribute, witnesses and victims' relatives look back on the murder of 16 children and a teacher at Dunblane Primary School in March 1996.

While the allies aim to end Hitler's domination of Western Europe, British troops are secretly being trained for an enormous, amphibious operation.

In June 1944, the Allied armada launches an assault on the Normandy coast, with soldiers charging in successive waves on a successful and historic day.

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.

The guys visit New Brunswick, where they uncover vintage automobiles, a retro coffin and a collector's bargain-priced inventory.

Experts investigate an Italian mountain that's stood witness to inexplicable phenomena for centuries. Could it somehow be attracting alien visitors.

A DNA study released in 2018 revealed that the original builders of Stonehenge mysteriously vanished - did they head back to a home among the stars.

Beverley Allitt was thought to be a 'model' nurse. Very astute, caring and always willing to help, why did she murder four children and attempt to kill 11 others.

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

Genocide 1942-1944: Along with Treblinka and Majdanek, Sobibor was one of the camps used in Operation Reinhard, in which the Nazis murdered almost two million people.

Experts investigate an Italian mountain that's stood witness to inexplicable phenomena for centuries. Could it somehow be attracting alien visitors.

A DNA study released in 2018 revealed that the original builders of Stonehenge mysteriously vanished - did they head back to a home among the stars.

Experts search ancient accounts of magic for evidence suggesting that the wizards and witches of yesteryear were given otherworldly knowledge by aliens.

Theorists search ancient texts for proof that extraterrestrials influenced the miraculous advances made by the Sumerian civilisation 5,000 years ago.

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

Experts investigate the power of the number three in history, science and astronomy. Could its huge significance bear links to extraterrestrial life.

Experts investigate why so many UFOs have been spotted near remote islands. Could these far-removed spots be the earthly homes of aliens.

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

Investigation into Jeremy Bamber's murder of his family in Essex in 1985. Sentenced for life, he still maintains he is innocent. Is the right person behind bars.

Up in Flames 1936-1940: At the end of 1939, the German Army invades Poland. Examine how Hitler succeeded in pushing through his rearmament and war plans relatively unhindered.

Explore the theme of society and myths that engulf memories of the past. These myths often become woven into the fabric of our society and can pass through generations.

A battle worthy of Hollywood that founded the glory of Ramses II when he faces the king Muwatalli II at Qadesh.

Experts investigate an Italian mountain that's stood witness to inexplicable phenomena for centuries. Could it somehow be attracting alien visitors.

A DNA study released in 2018 revealed that the original builders of Stonehenge mysteriously vanished - did they head back to a home among the stars.

Investigation into Jeremy Bamber's murder of his family in Essex in 1985. Sentenced for life, he still maintains he is innocent. Is the right person behind bars.

Ancient alien experts investigate the mysterious and fearsome Norse Gods. Were they divine? Or could the all-powerful Vikings have been guided by aliens.

A look at the controversial ancient alien theories of Erich von Däniken, whose books have sold over 65 million copies worldwide.

Could ancient rulers have had otherworldly links? Experts examine whether history's most powerful leaders were 'chosen' and guided by aliens.

A man is ready to liquidate his collection of dinosaur fossils and other quirky items and Scott hunts for maritime treasures while Sheldon eats oysters.

Could aliens have given our brains incredible untapped abilities? Experts ask whether harnessing these hidden powers could spark the next step in our evolution.

Experts question the link between divine substances and extraterrestrials. Could the food of the gods really have been sustaining Earth's alien visitors.

The eight year-old's disappearance and murder shocked the nation. Here, Sarah's mum reveals her tireless campaign to protect other children from paedophilia.

We learn about life on a Tudor ship from objects found on the Mary Rose, while on HMS Victory we learn the battle-winning tactics of Admiral Nelson.

Armageddon 1943-1945: The defeat at Stalingrad in 1943 was the turning point of the war and convinced the Nazi leadership to intensify their terror and propaganda campaigns.

Could aliens have given our brains incredible untapped abilities? Experts ask whether harnessing these hidden powers could spark the next step in our evolution.

Experts question the link between divine substances and extraterrestrials. Could the food of the gods really have been sustaining Earth's alien visitors.

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

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

Evidence might finally identify the hiding place of the billion-dollar Nazi gold train and blood-red river in Siberia points to catastrophic pollution.

An ancient man-made volcano might reveal bloody human sacrifice and a mystery in the Sahara might have a sinister explanation.

Man-made islands are spotted near a Korean missile facility and when something unexpected is found in a desert, experts investigate a lost city of giants.

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

The parents of innocent 11-year-old Rhys Jones, shot on his way home from football club in Liverpool 2007, speak about the harrowing day when they lost their son.

The Gates of Hell 1941-1942: In the shadow of the war, the Nazi regime gradually advances its "final solution to the Jewish problem", culminating in the Holocaust.

Himmler's desire to unearth the true origins of humanity led to an attempt to prove the Paleolithic past of Germany's Aryan race.

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.

Could aliens have given our brains incredible untapped abilities? Experts ask whether harnessing these hidden powers could spark the next step in our evolution.

Experts question the link between divine substances and extraterrestrials. Could the food of the gods really have been sustaining Earth's alien visitors.

The parents of innocent 11-year-old Rhys Jones, shot on his way home from football club in Liverpool 2007, speak about the harrowing day when they lost their son.

A ghost town covered in a strange, white power emerges from a lake in Argentina and a declassified CIA image uncovers a bizarre, giant Soviet weapon.

When a man-made island mysteriously appears off the US coast, grisly new evidence points to secret government experiments into psycho-chemical warfare.

A forbidden island points to a strange South American town that locals claim was the home of Adolf Hitler and a pit of bodies suggests fears of a zombie nightmare.

In Nova Scotia, Scott pays top dollar for a mechanical rooster and two treasures are found inside a decrepit storage barn.

Tattoos, piercings and body modifications are big business. But could our desire for these changes stem from a profound link to our ancestors.

Nestled in Utah lies a ranch some believe to be a hotbed of strange phenomena. Is it all connected to an alien entity known as the Skinwalker.

Police and witnesses reflect on David Copeland's nail bomb terror in 1999. Blasts in Soho, Brixton and Brick Lane killed three and injured over 100.

A look at the tactics employed to pass strategically important ships under the nose of the enemy, and the use of intelligence to carry out naval attacks.

The Reckoning 1945-1948: In 1945, WWII was over but the violence had not ended. The survivors want to blame the Germans. The reckoning with National Socialism is ambivalent.

Tattoos, piercings and body modifications are big business. But could our desire for these changes stem from a profound link to our ancestors.

Nestled in Utah lies a ranch some believe to be a hotbed of strange phenomena. Is it all connected to an alien entity known as the Skinwalker.

Taking place 110 miles behind enemy lines in a treacherous harbour, the Korean War's Battle of Incheon was one of the riskiest assaults in history.

Follow the major operations that have taken place in the Persian Gulf - from Earnest Will to Desert Storm - and examine the combat vessels from both sides.

Uncover the truth behind some of history's most mysterious sinkings, from a sunken World War I cruiser to a British Destroyer from the Falklands War.

Speed is always vital in naval combat, so buckle up and examine maritime warfare's fastest and most furious vessels of the last 150 years.

From the broadside cannons of 16th-century warships to thermonuclear warheads aboard Cold War subs, the naval arms race continues to evolve at a rapid pace.

We learn about life on a Tudor ship from objects found on the Mary Rose, while on HMS Victory we learn the battle-winning tactics of Admiral Nelson.

Documentary examining the fatal stabbing of 21-year-old motorist Stephen Cameron during an altercation on the M25 in 1996.

Genocide 1942-1944: Along with Treblinka and Majdanek, Sobibor was one of the camps used in Operation Reinhard, in which the Nazis murdered almost two million people.

A new report is made every 55 hours in Washington state, which is America's highest rate of UFO sightings per capita - but why are UFOs choosing to hover here.

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

Tattoos, piercings and body modifications are big business. But could our desire for these changes stem from a profound link to our ancestors.

Nestled in Utah lies a ranch some believe to be a hotbed of strange phenomena. Is it all connected to an alien entity known as the Skinwalker.

Documentary examining the fatal stabbing of 21-year-old motorist Stephen Cameron during an altercation on the M25 in 1996.

The 16th century witnessed a revolution in combat ship design and saw the birth of two legendary sea captains.

The Battle of Leyte Gulf tells the story of the largest sea conflict in history involving Pearl Harbor warships and the largest battleships in the world.

Specialized landing craft built to go where no other combat ship can reach and able to deliver tanks, jeeps, soldiers and supplies to the front lines.

Scott and Sheldon make a huge offer to buy the entire contents of a prolific collector's man cave and hidden gems are unearthed among the clutter of a defunct nautical museum.

A look at the controversial ancient alien theories of Erich von Däniken, whose books have sold over 65 million copies worldwide.

Ancient alien experts investigate the mysterious and fearsome Norse Gods. Were they divine? Or could the all-powerful Vikings have been guided by aliens.

Documentary examining the unsolved murder of TV presenter and newsreader Jill Dando, who was shot outside her house in Fulham, London, in 1999.

Investigation into Jeremy Bamber's murder of his family in Essex in 1985. Sentenced for life, he still maintains he is innocent. Is the right person behind bars.

Colditz Castle, The Great Escape and the bold Warburg Wire Job.

Alice Roberts and Matt Williams present more outstanding archaeology. In the east of Britain, sites include Must Farm, Colchester, Oakington, Lyminge and Silchester.

Dr Alice Roberts discovers what Britain was like before the Romans as she examines fascinating finds from the Bronze and Iron Ages.

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.

A look at the controversial ancient alien theories of Erich von Däniken, whose books have sold over 65 million copies worldwide.

Ancient alien experts investigate the mysterious and fearsome Norse Gods. Were they divine? Or could the all-powerful Vikings have been guided by aliens.

The Invasion Of Britain: It is 47 AD. Emperor Claudius is considered a village idiot and can only hang onto his throne by waging a spectacular conquest. He chooses Britannia.

Dacian Wars: As expansive military campaigns and raids by Dacian tribes begin to test the Roman Empire's finances, pressure builds on Emperor Domitian.

Ignatius refuses to pledge his allegiance to the emperor and is forced to travel 1,800 miles to the Colosseum, where his final punishment awaits.

A shocking look at the murder of eight-year-old Victoria Climbie, who was tortured and killed by her guardians in North London in 2000.

Enslaved by the Romans, Carpophorus gets trained to fight beasts in the Colosseum for the public's amusement.

Discover treasures and ancient manuscripts hidden in mysterious chambers, tunnels, caves and burial sites.

From massive asteroids and bursts of radiation, are we prepared for the calamity that may be coming our way.

A look at the controversial ancient alien theories of Erich von Däniken, whose books have sold over 65 million copies worldwide.

Ancient alien experts investigate the mysterious and fearsome Norse Gods. Were they divine? Or could the all-powerful Vikings have been guided by aliens.

A shocking look at the murder of eight-year-old Victoria Climbie, who was tortured and killed by her guardians in North London in 2000.

The Reckoning 1945-1948: In 1945, WWII was over but the violence had not ended. The survivors want to blame the Germans. The reckoning with National Socialism is ambivalent.

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

Revisiting the bloody British uprising against the Romans, presenter Karl Ude-Martinez tests out swords, spears and armour.

Nubian pyramids reveal the rise of female power in Ancient Kush, while satellite images uncover secrets of an ancient Puebloan site in New Mexico.

Experts investigate reports of bird-like figures that practised advanced medical science in ancient times. Could they have been extra-terrestrial.

Could ancient rulers have had otherworldly links? Experts examine whether history's most powerful leaders were 'chosen' and guided by aliens.

In an emotional tribute, witnesses and victims' relatives look back on the murder of 16 children and a teacher at Dunblane Primary School in March 1996.

The parents of innocent 11-year-old Rhys Jones, shot on his way home from football club in Liverpool 2007, speak about the harrowing day when they lost their son.

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

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

Alice Roberts learns more about mankind's Stone Age ancestors, and travels to Jersey to meet a team hoping to shed new light on the Neanderthals.

Dr Alice Roberts visits excavations in Orkney and York on the hunt for Viking relics. Finds include an amazing collection of silver and gold.

Experts investigate reports of bird-like figures that practised advanced medical science in ancient times. Could they have been extra-terrestrial.

Could ancient rulers have had otherworldly links? Experts examine whether history's most powerful leaders were 'chosen' and guided by aliens.

Rebellion And Betrayal: Marcus Aurelius inherits a rapidly growing Roman Empire, embroiled in a war on two fronts. But can he bring peace and prosperity back to the Empire.

Wrath Of The Gods: With the civil war raging on, there's a new challenge ahead for Rome: the rise of the new religion of Christianity. The Empire is invaded by the Goths.

Just one of Rome's emperors is willing to step out of the Imperial Box into the arena and his name is Commodus, a man with a reputation for making enemies.

Survivors, victims' relatives and former detectives reflect on the Real IRA car bomb that killed 29 people in Omagh, Northern Ireland in 1998.

Emperor Trajan throws his great games of AD 107 and the crowd is treated to the rare spectacle of female gladiators.

Uncover haunting factors and new evidence, possibly leading to fresh verdicts for these enigmatic men.

Theories surrounding the death of Hermann, who managed to cheat the hangman by taking a cyanide capsule and his relationship with Lt. Colonel Douglas M Kelley.

Experts investigate reports of bird-like figures that practised advanced medical science in ancient times. Could they have been extra-terrestrial.

Could ancient rulers have had otherworldly links? Experts examine whether history's most powerful leaders were 'chosen' and guided by aliens.

Survivors, victims' relatives and former detectives reflect on the Real IRA car bomb that killed 29 people in Omagh, Northern Ireland in 1998.

Atlantis, the legendary continent that sank. As the Nazis rose to power, Himmler and the SS were convinced Atlantis existed. Season premiere.

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

Five Bronze Age bodies found in a Kent pit. One old woman is posed pointing at something. The team investigates what and why.

The River Hunters head to the River Lochy in search for evidence of the clashing Scottish clans embroiled in the 17th Century civil war.

When millions responded to a call to storm Area 51, the US military vowed deadly force. Are they hiding the truth about extraterrestrials on Earth.

Over the past 20 years, thousands of potentially habitable exoplanets have been found. Could they be home to intelligent extraterrestrial life.

Investigation into Jeremy Bamber's murder of his family in Essex in 1985. Sentenced for life, he still maintains he is innocent. Is the right person behind bars.

The story of one of the world's most effective war machines: The Viking longship. They were elegant, versatile and feared.

The troubled beginnings and amazing exploits of the legendary British heavy bomber. Plus, see a replica up close.

When millions responded to a call to storm Area 51, the US military vowed deadly force. Are they hiding the truth about extraterrestrials on Earth.

Over the past 20 years, thousands of potentially habitable exoplanets have been found. Could they be home to intelligent extraterrestrial life.

Alice Roberts and Matt Williams visit the Neolithic Orkney World Heritage Site, where they explore finds from archaeological digs across the north of Britain.

Alice Roberts and Matt Williams visit sites in the west of Britain, including one uncovering the rituals of Stonehenge.

Alice Roberts and Matt Williams present more outstanding archaeology. The team unearths a mass grave and search the Thames for clues to a 17th century tragedy.

In the north of Britain, a team discovers clues to Scotland's first kingdoms and metal detectorists unearth a Viking treasure hoard.

Dr Alice Roberts explores finds from the west of Britain, including the lost World War I training trenches on Salisbury Plain.

A look at the tactics employed to pass strategically important ships under the nose of the enemy, and the use of intelligence to carry out naval attacks.

Families of victims and former friends open up about Stephen Griffiths, the Bradford killer who was found guilty of murdering three women in 2010.

From skyscrapers like One World Trade Centre to impenetrable vaults like Fort Knox, humanity's strongest structures were engineered to defy disaster.

Was a UFO tracking an American fighter plane? The team of experts examines the evidence to find the truth.

A woman survives being sucked into a tornado.