Don Wildman explores the 1906 San Francisco earthquake that claimed approximately 3,000 lives; he also gains insight into when and where the next big earthquake may strike.

The clifftop ruins of Tintagel Castle are shrouded in a tumultuous history and believed to be the birthplace of King Arthur; experts use cutting-edge tech to unlock the secrets of this ancient structure and reveal the truth behind a legendary ruler.

The sacred city of Nippur and the world's only ziggurat contain elusive mysteries to the ancient Sumerian people; now, archaeologists armed with pioneering tech are on a quest to reveal the secrets behind the earliest known civilization in history.

The downfall of the powerful Maya city of Palenque continues to mystify archaeologists today; now, investigators gain rare access to explore lost tombs to reveal the truth behind this legendary city and the mystery behind its enigmatic queens.

Astronaut Leroy Chiao's spacewalk is interrupted by bright lights flying past; a flying saucer is photographed from the Apollo.

Cosmonauts are trapped in a capsule in a frozen lake; a NASA scientist investigates the Hindenburg; the full moon affects experiments.

Apollo 12 astronauts bring back something alive from the moon; NASA tracks an asteroid heading towards Earth but make an incredible discovery.

The center of the Milky Way is home to strange and deadly phenomena that is difficult to understand; with the help of science, experts reveal how the black hole, the galaxy's core, shapes life on Earth.

Time travel may be more possible now than ever imagined, and today, cutting-edge technology and the latest research into black holes and wormholes is helping experts get much closer to discovering how to travel through time.

Templar fact and fiction have become blurred by their depictions in book and on film. This program presents a very different picture that challenges head on the orthodox beliefs about an order that angered much of Europe - particularly France.

Mary Magdalene, a key figure in Christianity, traveled with Jesus and is said to have witnessed his crucifixion and resurrection.

Mystery still surrounds how fascist dictator Benito Mussolini met his end, before being hanged.

The extraordinary story of the Bulgarian secret department called Service 7, a force that operated in 9 countries.

The Vatican Secret Archives is a treasure trove of history that is shrouded in secrecy; Jamie Theakston heads to Rome in a bid to gain access.

Jamie Theakston investigates Johann Reichhart, a German executioner who killed approximately 3,000 people during World War II.

Experts uncover a mysteriously abandoned underground complex that may have hid something very dark.

When the Nazis took Ksiaz Castle in 1941, it wasn't for the view, and they got to work turning it into a fortress; secret staircases and elevators were built, while underneath, a vast network of tunnels was taking form.

A labyrinth of tunnels carved deep in the Polish mountains leads to the largest underground Nazi weapons development complex ever discovered.

As the Nazis plot the beginning of their empire, Heinrich Himmler transforms the ruins of a German castle into a mysterious Nazi complex.

A medieval castle-like complex in the remote mountains of Germany contains dark secrets to the Nazi's plan for world domination; experts investigate and uncover a nefarious training facility designed to groom elite Nazi personnel.

As the Nazis embark on their dominate rise to power, a massive construction project secretly begins across Eastern Germany; using the latest tech, experts uncover an elaborate network of underground tunnels and bunkers with frightening ambitions.

The skeletal remains of strange structures are clues to a mysterious research installation secretly built by the Nazis in Western Poland; experts investigate and uncover top-secret military fuel development with a catastrophic purpose.

A medieval castle-like complex in the remote mountains of Germany contains dark secrets to the Nazi's plan for world domination; experts investigate and uncover a nefarious training facility designed to groom elite Nazi personnel.

As the Nazis embark on their dominate rise to power, a massive construction project secretly begins across Eastern Germany; using the latest tech, experts uncover an elaborate network of underground tunnels and bunkers with frightening ambitions.

The skeletal remains of strange structures are clues to a mysterious research installation secretly built by the Nazis in Western Poland; experts investigate and uncover top-secret military fuel development with a catastrophic purpose.

As the Nazis plot the beginning of their empire, Heinrich Himmler transforms the ruins of a German castle into a mysterious Nazi complex.

Jamie Theakston investigates Johann Reichhart, a German executioner who killed approximately 3,000 people during World War II.

Experts uncover a mysteriously abandoned underground complex that may have hid something very dark.

Life may have been found on Mars; mysterious Moon Pigeons.

After Neil Armstrong's moonwalk, he leads an expedition into the Amazon to find a legendary library that holds all knowledge of an advanced alien civilization; experts ask if a close encounter on the moon's surface inspired Armstrong's quest.

When a Chinese moon rover breaks down, a scientist at NASA points to a mysterious material that seemed to sabotage the Apollo missions decades earlier; the Rosetta spacecraft discovers a comet that appears to be singing.

Some of the brightest minds and theorists on the planet explore the limits of human knowledge and explain the science behind the rules of the universe.

Earth's journey through the universe is a perilous one; new discoveries reveal that the planet is heading toward a mysterious area of the cosmos.

An unearthly presence at a nuclear launch site in Cyprus visits a UN peacekeeper and helps him fight off a deadly enemy.

An Infantryman encounters an otherworldly presence on a training mission.

An unknown presence pulls an Armed Forces officer into a living nightmare.

U.N. Peacekeeper develops a mysterious power to fight off a deadly foe.

An intelligence analyst on a secret mission makes an unearthly discovery.

A Russian soldier describes being lured into a swamp by an unnatural entity; an Ohio military base with a UFO connection; an interview with a US Air Force colonel whose alien-craft sightings are finally confirmed.

A Russian Infantryman fights an unknown presence in a Chechnyan forest.

An exploration into whether breakthroughs such as high-energy lasers, antigravity technology and super-advanced aircraft are the result of human efforts alone or contact with UFOs.

UFO experts investigate whether the value, reverence and desire for gold is the result of extraterrestrial landings in the ancient past.

Evidence suggests contact with interstellar travelers in the distant past may have influenced humankind and many of its sacred sites.

Although alien abduction claims are often dismissed as hoaxes or delusions, there are landmark cases that scholars struggle to refute; Calvin Parker retells his harrowing experience of being abducted near the Pascagoula River in Mississippi.

UFO sightings have been caught on film across the United States, yet the government continues to deny the existence of extraterrestrials; recent news of the Pentagon's secret UFO program may reveal evidence of what the military has known for decades.

Using archival audio recordings, official transcripts and incident reports, UFO researchers investigate what really happened during encounters between law enforcement personnel and UFOs.

Although alien abduction claims are often dismissed as hoaxes or delusions, there are landmark cases that scholars struggle to refute; Calvin Parker retells his harrowing experience of being abducted near the Pascagoula River in Mississippi.

UFO sightings have been caught on film across the United States, yet the government continues to deny the existence of extraterrestrials; recent news of the Pentagon's secret UFO program may reveal evidence of what the military has known for decades.

Using archival audio recordings, official transcripts and incident reports, UFO researchers investigate what really happened during encounters between law enforcement personnel and UFOs.

Evidence suggests contact with interstellar travelers in the distant past may have influenced humankind and many of its sacred sites.

A Russian soldier describes being lured into a swamp by an unnatural entity; an Ohio military base with a UFO connection; an interview with a US Air Force colonel whose alien-craft sightings are finally confirmed.

A Russian Infantryman fights an unknown presence in a Chechnyan forest.

A distant planet shows an Earth-like atmosphere; a glowing light suggests an atmosphere on the Moon; why there are blueberries on Mars.

The discovery of geysers on a moon; NASA's mission to detect life; an object is spotted approaching an asteroid.

Neil Armstrong enters an unexplained spin; an Apollo 17 photo seems to show a US military outpost on the Moon; possible alien life swimming in the oceans of Jupiter's moons.

NASA's Juno spacecraft is part of a cutting-edge mission to explore the mysteries of Jupiter; as this mighty probe is pummeled with deadly radiation, it gathers new data that could change everything we know about the solar system's biggest planet.

NASA plans to send humans to Mars within just 15 years, but to reach this next frontier of space exploration, experts must discover new technology and cutting-edge science that protects astronauts from the Red Planet's deadliest killers.

We don't yet know where the edge of the universe is or what happens there; but thanks to cutting-edge technology and new discoveries, experts might finally reveal the secrets of the phenomena.

Trask and his crew take on New Bullards Dam, and they need to place critical target sensors for monitoring seismic activity; in Colorado, a bird detection system needs to be installed at a wind turbine facility.

Trask and his crew scale Sutro Tower to inspect crucial cable junctions and must avoid deadly radiation at nearly 1,000 feet in the air; in Oregon, loose boulders need to be removed along a cliffside road that needs to be reopened.

Trask and his team take on the iconic Space Needle in Seattle to fix an aging window-washing basket; in San Antonio, they look to get a stadium ready for game day.

Trask and his crew look for any critical issues on Foresthill Bridge in California, a vital escape route during wildfires; in Garden City, Kan., the team needs to inspect massive grain elevators where one spark could ignite a devastating explosion.

Trask and his crew take on one of the world's largest bronze statues, Pegasus and Dragon, and they need to figure out how to get on this colossus of a structure; one of the world's largest roller coasters is due for an inspection.

Trask takes on a decommissioned lighthouse 32 miles off the coast of North Carolina, and the crew must work suspended above shark-infested waters; an aging stadium with corroding catwalks needs maintenance for hockey season.

A flash flood catastrophe brings one of America's most vital highways to a complete standstill in the California desert; using scientific methods, expert engineers investigate and discover how its bridge foundations lacked a crucial element.

A crane disastrously falls across two lanes of traffic during construction work on a landmark bridge in New York City.

An explosion at a chemical plant in New Jersey kills five workers and unleashes a torrent of black smoke into the morning sky; an investigation reveals how a small amount of water led to this fatal manufacturing catastrophe.

Tragedy strikes in Puerto Rico as an explosion takes down a popular shoe shop.

There's shock in the Bronx, as a vast sinkhole swallows a van.

In Scotland, a distinguished library is ravaged by not one but two disastrous fires; experts explore how outdated construction methods and materials contributed to the vulnerability of this esteemed place of learning.

Tragedy strikes in Puerto Rico as an explosion takes down a popular shoe shop.

There's shock in the Bronx, as a vast sinkhole swallows a van.

In Scotland, a distinguished library is ravaged by not one but two disastrous fires; experts explore how outdated construction methods and materials contributed to the vulnerability of this esteemed place of learning.

An explosion at a chemical plant in New Jersey kills five workers and unleashes a torrent of black smoke into the morning sky; an investigation reveals how a small amount of water led to this fatal manufacturing catastrophe.

Trask and his crew take on one of the world's largest bronze statues, Pegasus and Dragon, and they need to figure out how to get on this colossus of a structure; one of the world's largest roller coasters is due for an inspection.

Trask takes on a decommissioned lighthouse 32 miles off the coast of North Carolina, and the crew must work suspended above shark-infested waters; an aging stadium with corroding catwalks needs maintenance for hockey season.

Spaceships powered by atomic bombs; artificial rings encircle an entire star; Neil Armstrong's transmission feed cuts off when he spots strange lights on the moon; how can lightning talk to itself.

Astronauts evacuate when a mystery object hurtles toward the ISS; a NASA secret agent goes undercover to retrieve missing moon rocks; scientists struggle to find answers when they discover a huge void at the edge of the solar system.

Lost tapes show that Apollo astronauts heard unexplained transmissions on the far side of the moon; an amateur astronomer finds an odd disturbance in Martian atmosphere; an unidentified object in Earth orbit starts stalking Russian spacecraft.

New astronomical research is beginning to reveal an invisible scaffold of dark matter known as the Cosmic Web, an intergalactic network that transformed the universe from a chaotic Big Bang into the structured beauty of the present day cosmos.

Cosmic rays capable of destroying human DNA are hurtling through outer space like subatomic bullets, causing space crews radiation damage.

The remains of five warships could reveal new insights into how the nuclear arms race changed the world forever; using 3-D sonar scan technology, an expert team of marine scientists investigate the catastrophic effects of atomic explosions at sea.

The enigmatic shipwrecks of El Faro and the Empress of Ireland occurred a century apart and both remain a mystery of the sea; armed with the latest technology, experts explore these doomed ships to discover what set them on the path to catastrophe.

The aerial bombardment of the Japanese fleet and the torpedo strike of the Wilhelm Gustloff are two of the most shocking attacks of WWII; expert divers explore these underwater graveyards for new evidence of these maritime conflicts.

The USS Arizona and the HMS Hood were two of the most powerful warships in history, but their weaknesses paid a fatal price; experts investigate evidence that may reveal why the age of the battleship has come to a sudden and violent end.

The wreckages of three German U-boats are eroding at the bottom of the sea along with the stories behind their disastrous fate; now, a team of maritime archaeologists race to locate the submarines and solve the mystery behind their deadly demise.

For over a century, the stories and wrecks of HMS Hampshire and HMS Vanguard continue to be shrouded in mystery; two research teams are granted special access to investigate and uncover what happened to these WWI warships in their final moments.

Countless shipwrecks lost in the depths of the oceans are time capsules containing tales of adventure and tragedy; now, marine experts hunt to locate these forgotten ships, explore their secrets and unlock their incredible stories.

A beloved hospital in the Big Easy was once the site of heroic efforts by medical staff and volunteers to evacuate patients after Hurricane Katrina; the historic Charity Hospital is being revitalized by another major New Orleans institution.

The notorious owner of this Georgia plantation once held a sale of nearly 450 enslaved people; appalled at her husband's cruelty, the man's wife wrote and published a journal about the atrocities she witnessed.

An unassuming factory marks a revolutionary leap forward -- and upward -- in how humans travel; due to ongoing legal battles and innovative designs from their many competitors, these historic upstarts would soon be grounded.

An upstart mining town fuels the American war effort in both World Wars with its bountiful deposits of lead and zinc; the dusty remains of the mining efforts that put Picher on the map would condemn the city to abandonment years later.

A railroad enterprise once built this company town for its workers to live in, but when thousands of employees went on strike, the military intervened; the history of the complex remains as relevant as ever.

At a nondescript bowling alley in South Carolina, evidence of a peaceful student protest that turned deadly comes to light; a series of tunnels in L.A. becomes a shady place for resourceful people in this sunny city.

An upstart mining town fuels the American war effort in both World Wars with its bountiful deposits of lead and zinc; the dusty remains of the mining efforts that put Picher on the map would condemn the city to abandonment years later.

A railroad enterprise once built this company town for its workers to live in, but when thousands of employees went on strike, the military intervened; the history of the complex remains as relevant as ever.

At a nondescript bowling alley in South Carolina, evidence of a peaceful student protest that turned deadly comes to light; a series of tunnels in L.A. becomes a shady place for resourceful people in this sunny city.

An unassuming factory marks a revolutionary leap forward -- and upward -- in how humans travel; due to ongoing legal battles and innovative designs from their many competitors, these historic upstarts would soon be grounded.

For over a century, the stories and wrecks of HMS Hampshire and HMS Vanguard continue to be shrouded in mystery; two research teams are granted special access to investigate and uncover what happened to these WWI warships in their final moments.

Countless shipwrecks lost in the depths of the oceans are time capsules containing tales of adventure and tragedy; now, marine experts hunt to locate these forgotten ships, explore their secrets and unlock their incredible stories.

Myths Strike Back when Adam and Jamie once again confront the dark side of science in a workshop not so far away.

Stow your tray tables because in this aviation extravaganza Adam and Jamie tackle two flights of fantasy.

The team tests if NASA really did land on the Moon.

Exploring new discoveries that rewrite the history of the solar system, revealing a complex and violent story that begins with the birth of the sun from the debris of a massive galactic collision to its eventual fate as a lone zombie star.

New astronomical research is beginning to reveal an invisible scaffold of dark matter known as the Cosmic Web, an intergalactic network that transformed the universe from a chaotic Big Bang into the structured beauty of the present day cosmos.

Cosmic rays capable of destroying human DNA are hurtling through outer space like subatomic bullets, causing space crews radiation damage.

Mars is infested with robots, orbiting the planet and roaming the Martian surface on a mission to uncover its secrets; now, Perseverance joins this dedicated group of machines to uncover if there is, or was ever, life on the Red Planet.

The collision of two supermassive black holes is the most violent event that can occur in the universe; experts explore where a black hole's energy originates and what really happens when the two most powerful objects in the cosmos clash.

When astronomers discover a rogue black hole speeding through the Milky Way, they investigate how much danger this cosmic monster poses to Earth, and what would happen if it ever entered our solar system.

Experts investigate if a nearby exoplanet could be the home to an alien civilization of strange, metallic monsters, after a new discovery confirms that life can thrive on such a strange world.

When a former Area 51 insider alleges that the Roswell UFO incident was a nefarious Soviet conspiracy masterminded by Stalin, experts investigate if it was indeed an enemy plot against America -- or if the confession is just another cover-up.

A strange discovery by NASA's Mars Curiosity rover suggests the Red Planet was home to an alien nuclear war 300 million years ago; experts investigate if an extraterrestrial Armageddon transformed an Earth-like world into a wasteland.

Earth is hit by 100 tons of rock from space every day; most burn up in the atmosphere, but a single rock wiped out the dinosaurs.

Aliens could be lethal killers who want to invade and plunder our world; a team of experts investigate extra-terrestrial beings and their threat to human life.

The story of the Apollo 11 moon landing is told with footage not seen anywhere else, revealing how an army of engineers, scientists and astronauts went to incredible lengths to achieve America's greatest technological feat.

Experts discuss the many possible ways that could spark the beginning of the end for the universe, including when and why it would happen.

The story of the Apollo 11 moon landing is told with footage not seen anywhere else, revealing how an army of engineers, scientists and astronauts went to incredible lengths to achieve America's greatest technological feat.

Experts discuss the many possible ways that could spark the beginning of the end for the universe, including when and why it would happen.

Aliens could be lethal killers who want to invade and plunder our world; a team of experts investigate extra-terrestrial beings and their threat to human life.

Experts investigate if a nearby exoplanet could be the home to an alien civilization of strange, metallic monsters, after a new discovery confirms that life can thrive on such a strange world.

When a former Area 51 insider alleges that the Roswell UFO incident was a nefarious Soviet conspiracy masterminded by Stalin, experts investigate if it was indeed an enemy plot against America -- or if the confession is just another cover-up.

Adam and Jamie, along with Al Jean, the executive producer of "The Simpsons," test occurrences from the show.

Adam and Jamie examine "The A-Team"; they find out whether it's possible to build a working cannon using materials abandoned in a barn.

Testing the hijinks from the "Indiana Jones" franchise.

Ballistic backyard bedlam; glass guillotine; accidental ammunition.

Adam and Jamie investigate the ability of hit men to take down a target.

The Roanoke colony vanishes without a trace, and centuries later, it remains one of history's greatest unsolved mysteries; but new evidence might at last reveal its fate; after a man is swallowed by earth, experts wonder if a sinkhole is to blame.

In 2009, an Air France flight goes missing, and investigators discover this tragedy could happen again; after a huge area of Siberian forest is destroyed, investigators race to find the culprit; new evidence might solve this century-old mystery.

New technology reveals lost cities in inhospitable jungle; researchers wonder if the mythical city of El Dorado could be the next discovery; after a crystal is found on a shipwreck, experts believe it could prove how the Vikings discovered America.

After five planes vanish in the Bermuda Triangle, new science suggests a strange geological force is responsible; satellites reveal lost tribes living in the Amazon jungle, but some civilizations remain missing, stumping experts.

Atlantis is one of the most famous disappearances of all time; after thousands of years, state-of-the-art technology might finally be able to crack this ancient mystery; after nine hikers die in a gruesome cold case, new science provides a hot lead.

In 1962, three convicts attempt the impossible and escape from Alcatraz prison; officials believe the men drowned, but a new scientific experiment suggests they made it to shore.

In 2014, Malaysia Airlines flight MH370 vanishes; rescue crews search its last known position but find nothing; the fate of the flight remains a mystery; theories abound but facts are few.

Security guards patrolling the basement of an empty municipal building are shocked when they encounter a door repeatedly opening and violently slamming shut; experts investigate a connection to black magic rituals and the building's disturbing past.

A close encounter with an enraged ape-like creature is caught on camera, experts investigate if it's evidence of a once-extinct Neanderthal specimen engineered by a nearby experimental research facility.

A boy who can turn his head 180 degrees and face directly behind him resembles infamous accounts of demonic possession from horror films; experts use cutting-edge technology to find out what's giving him this extreme ability.

A bizarre, tentacled black mass emerges from the seas on an island in the Caribbean, and on-lookers are horrified as it writhes ashore; experts use cutting-edge tech to investigate the origin of this alien invader.

A surveillance camera captures a woman vanishing from her bed as she sleeps next to her husband in their suburban English home; experts investigate and uncover numerous police records that report a strange pattern of nearby alien abductions.

Footage of a wolf-like creature in the remote wilderness of northern Canada could be evidence of a dire wolf, a prehistoric beast that went extinct at the end of the last Ice Age; experts use cutting-edge technology to investigate if it has returned.

A bizarre, tentacled black mass emerges from the seas on an island in the Caribbean, and on-lookers are horrified as it writhes ashore; experts use cutting-edge tech to investigate the origin of this alien invader.

A surveillance camera captures a woman vanishing from her bed as she sleeps next to her husband in their suburban English home; experts investigate and uncover numerous police records that report a strange pattern of nearby alien abductions.

Footage of a wolf-like creature in the remote wilderness of northern Canada could be evidence of a dire wolf, a prehistoric beast that went extinct at the end of the last Ice Age; experts use cutting-edge technology to investigate if it has returned.

A boy who can turn his head 180 degrees and face directly behind him resembles infamous accounts of demonic possession from horror films; experts use cutting-edge technology to find out what's giving him this extreme ability.

In 1962, three convicts attempt the impossible and escape from Alcatraz prison; officials believe the men drowned, but a new scientific experiment suggests they made it to shore.

In 2014, Malaysia Airlines flight MH370 vanishes; rescue crews search its last known position but find nothing; the fate of the flight remains a mystery; theories abound but facts are few.

Kari, Tory and Grant put their lives on the line as they test a classic tale from the farmyard; we've all heard it, if you have to cross a field with a bull, the last thing you want to do is wear red.

The team tests Superhero gadgets including the grappling hook, the phantom ring punch and the phone booth change.

Adam and Jamie put the pedal to the metal and set out to test two tall tales from the street racing world; they investigate whether oversteering increases agility and if reverse parking is still possible using the drifting technique.

NASCAR car bodies; hurley sticks; tube power amplifiers; thermal coffee pots.

Examines how items such as electric vehicle charging stations, grappa and lunar rover replicas are manufactured.

Slate tiles; hot dog carts; garage door openers; bicycle seats.

Examines how items such as racing leathers, evaporative cooling towers, wooden rocking chairs and wire wheels are made.

How custom shoe trees, clay targets, squeeze chutes, and composite boat propellers are made.

Learning how orthodontic retainers, orange juice, retractable saunas, and sawmill knives are made.

How table tennis tables, plastic model kits, and light microscopes are made.

Handmade hammers; gummy vitamins; boat trailers; tea lights; jar candles.

Exploring the production processes of pétanque balls, biologic medicines, asphalt pavers and Basque espadrilles.

The host explores and explains the proper making of leather basketballs, wood panel canvases, shoelaces and floodgates in large quantities for public use.

Power steering pumps; Asian bowl meals; walking canes.

Lab extractors; custom-made chandeliers; power trainers; coffee pods.

Deep in the Iraqi desert, a ziggurat towers over the remains of the first civilization ever known in human history; armed with pioneering satellite imagery, experts investigate the dark mysteries behind the ancient structure.

Venice was once a fearsome superpower home to secrets, wealth, and treachery; today, scientists use pioneering acoustic imaging technology to discover the city's ancient foundations and reveal how it's still standing.

A prehistoric mega-structure emerges from the sands of an English shore that could reveal lost mysteries of the Bronze Age; using pioneering technology and 3D imaging analysis, experts uncover dark, ancient rituals once performed here.

Archaeologists decode cryptic inscriptions and use innovative geophysical analysis to reveal the secrets of Mount Nemrut in southeastern Turkey.

The sprawling city of Persepolis was capital to the first imperial civilization that conquered most of the known ancient world; experts use advanced forensic archaeology to reveal the secrets behind Persia's mysterious and dominating metropolis.

The legendary metropolis of Xanadu and its fabled existence have mystified experts for centuries; archaeologists use cutting-edge aerial imaging to investigate new discoveries and reveal the truth behind this mythical lost city.

The Silk Road was the ancient trade route that connected Eastern and Western worlds. The road traveled through many countries and was a source of ancient mystery. Even today, the road is shrouded in mystery.

Palmyra: pearl of the Syrian Desert; experts return to the site and use CGI reconstruction to reveal the secrets of Palmyra's ancient engineers.

The Silk Road was the ancient trade route that connected Eastern and Western worlds. The road traveled through many countries and was a source of ancient mystery. Even today, the road is shrouded in mystery.

Palmyra: pearl of the Syrian Desert; experts return to the site and use CGI reconstruction to reveal the secrets of Palmyra's ancient engineers.

The legendary metropolis of Xanadu and its fabled existence have mystified experts for centuries; archaeologists use cutting-edge aerial imaging to investigate new discoveries and reveal the truth behind this mythical lost city.

Deep in the Iraqi desert, a ziggurat towers over the remains of the first civilization ever known in human history; armed with pioneering satellite imagery, experts investigate the dark mysteries behind the ancient structure.

Venice was once a fearsome superpower home to secrets, wealth, and treachery; today, scientists use pioneering acoustic imaging technology to discover the city's ancient foundations and reveal how it's still standing.

A piece of the sun seems to have vanished; the Hubble spots an unidentified object traveling faster than light.

Soviet photos of the moon are intercepted by the CIA; a malfunction aboard the ISS, which imperils the whole crew; NASA probe finds evidence of the possibility of life on Mars.

Three cosmonauts mysteriously die as they re-enter Earth's atmosphere and NASA needs to know why; a declassified document shows a CIA plan to use a space disaster as a cover to start World War 3.

With more than 80 moons, Saturn could rank among the most dynamic planetary system in Sol's neighborhood; with its giant underground oceans and protective magnetic fields, experts explore how Saturn's moons offer new insight into the Solar System.

Dark Matter is thought to be the cosmic glue that holds the universe together, yet the search for it continues to eluded scientists today.

New discoveries suggest that a sea beast like the Kraken could have existed, and experts examine a strange monster that could give shocking answers into this underwater mystery.

Terrifying new discoveries reveal the bloody truth behind the legends of vampires, and experts investigate why people believed these monsters had a taste for human blood.

New discoveries reveal the truth behind the Loch Ness Monster, and experts investigate the world's most mysterious waters in search of evidence that a prehistoric monster could still be lurking in the deep.

Werewolves were once so feared, people suspected of the power were hunted and killed, but even so, many admitted that they could become these deadly creatures, and new evidence reveals why a powerful hallucinogenic drug could be to blame.Guests: Brian Regal, Joy Reidenberg, Richard Schwab..

New discoveries uncover the dark secrets of Egypt's strange half-man, half-lion beast, revealing why the pharaohs were so intent on transforming into this powerful and ferocious monster.

New discoveries reveal hard evidence showing that dragons were not just the stuff of nightmares, and experts use the latest science to explain why people believed in these wicked creatures.

New discoveries reveal the bloody origin of the feathered snake god, and experts investigate why the ancient Mesoamericans believed that human sacrifice was the only way to appease the deadly monster.

Lost for centuries, scholars believe the Ark of the Covenant never left Jerusalem and remains buried beneath this ancient city; now, a pioneering team of archaeologists is on a quest to unearth the most famous and treasured artifact in human history.

Ancient documents and legends suggest that the Ark of the Covenant may have been stolen by Roman legions and hidden in Rome; a team of archaeologists explore mystery cults and ancient catacombs to uncover the truth behind this treasured artifact.

Ancient scriptures describe the Ark of the Covenant as possessing an almighty force with the capacity to kill; now, an expert team of archaeologists trace the ark's destructive path in a quest to discover the truth behind its mythical power.

According to biblical scripture, the prophet Jeremiah hides the Ark of the Covenant at a remote location for safekeeping; a team of archaeologists investigate sacred sites and ancient tombs to retrace the possible journey of this lost artifact.

According to biblical scripture, the prophet Jeremiah hides the Ark of the Covenant at a remote location for safekeeping; a team of archaeologists investigate sacred sites and ancient tombs to retrace the possible journey of this lost artifact.

The holy order of the Knights Templar are believed to have located and seized the Ark of the Covenant centuries ago; now, expert historians follow the trail of this elusive order to uncover the truth behind this sacred relic's mysterious journey.

The holy order of the Knights Templar are believed to have located and seized the Ark of the Covenant centuries ago; now, expert historians follow the trail of this elusive order to uncover the truth behind this sacred relic's mysterious journey.

Some allege that the Ark of the Covenant was stolen by King Solomon's son and taken to Ethiopia thousands of years ago; now, archaeologists investigate new, mysterious leads to uncover the secrets behind this lost relic's elusive journey.

Some allege that the Ark of the Covenant was stolen by King Solomon's son and taken to Ethiopia thousands of years ago; now, archaeologists investigate new, mysterious leads to uncover the secrets behind this lost relic's elusive journey.

According to biblical scripture, the prophet Jeremiah hides the Ark of the Covenant at a remote location for safekeeping; a team of archaeologists investigate sacred sites and ancient tombs to retrace the possible journey of this lost artifact.

The holy order of the Knights Templar are believed to have located and seized the Ark of the Covenant centuries ago; now, expert historians follow the trail of this elusive order to uncover the truth behind this sacred relic's mysterious journey.

Some allege that the Ark of the Covenant was stolen by King Solomon's son and taken to Ethiopia thousands of years ago; now, archaeologists investigate new, mysterious leads to uncover the secrets behind this lost relic's elusive journey.

Ancient scriptures describe the Ark of the Covenant as possessing an almighty force with the capacity to kill; now, an expert team of archaeologists trace the ark's destructive path in a quest to discover the truth behind its mythical power.

Ancient scriptures describe the Ark of the Covenant as possessing an almighty force with the capacity to kill; now, an expert team of archaeologists trace the ark's destructive path in a quest to discover the truth behind its mythical power.

New discoveries reveal hard evidence showing that dragons were not just the stuff of nightmares, and experts use the latest science to explain why people believed in these wicked creatures.

New discoveries reveal the bloody origin of the feathered snake god, and experts investigate why the ancient Mesoamericans believed that human sacrifice was the only way to appease the deadly monster.

When the Soviet Union unveils its own space shuttle, the CIA hatches a secret revenge plot; recent discoveries shed new light on the destruction of Sodom and Gomorrah; a missing nuclear weapon could threaten a NASA base in the Arctic.

A NASA probe captures an image of a familiar structure on Mars' surface.

An astronomer records an unusual radio signal from beyond the solar system; FBI agents find classified documents at the home of a NASA scientist; when scientists discover strange DNA in the octopus, they examine if their origins could be alien.

Mars is infested with robots, orbiting the planet and roaming the Martian surface on a mission to uncover its secrets; now, Perseverance joins this dedicated group of machines to uncover if there is, or was ever, life on the Red Planet.

The collision of two supermassive black holes is the most violent event that can occur in the universe; experts explore where a black hole's energy originates and what really happens when the two most powerful objects in the cosmos clash.

Containing intricately carved concentric circles, the Towie Ball is one of the finest Neolithic stoneworks ever discovered; using cutting-edge imaging technology, experts investigate the purpose behind this 5,000-year-old black stone mystery.

The shattered skull of a 19th century railway worker is now one of the most astonishing objects in the history of medical science; experts explore this traumatic injury to reveal how it changed the field of neuroscience.

Investigating whether a gold death mask is the face of a king who fought in the Trojan Wars; three ancient chalk carvings could be the secret to constructing Stonehenge; how a printing plate from the UK Treasury ended up in an Austrian lake.

Investigating whether a machine can read personalities; an ancient golden mask painted with human blood; a cursed chicken pot.

A minuscule metal sphere containing two microscopic holes could be the smallest murder weapon in history; experts explore how this tiny object is linked to one of the most bizarre true crime cases of the 20th century.

A stone sphere, a hook and five fragments of wood are the only objects ever discovered inside the Great Pyramid of Giza; experts investigate if they can explain the mysteries behind the only surviving Wonder of the Ancient World.

Cameras capture stunned pedestrians running for cover as droplets of fire begin to rain down on the streets of St. Petersburg, Russia; experts investigate a network of nearby tram lines and the effect of a sudden lightning storm.

Cameras capture an enormous fireball erupting along with a series of explosions in a North Korean border town; experts investigate and discover a cramped and overcrowded housing project linked to a deadly propane tank disaster.

Cameras capture a towering 1,600 foot pillar of flame erupting from the Caspian Sea off the coast of Azerbaijan; experts investigate a potential link to the nation's weapons arsenal and military aspirations over disputed neighboring territory.

A vacationing family films waves of fire breaking along the shores of an Indonesian island; experts investigate a possible connection to a classified WWII beach-burning weapon developed by the British to incinerate invading armies.

Motorcyclists film a bizarre, elongated humanoid creature walking along a road in Jharkhand, India; experts investigate the violent history behind an organized cult of professional robbers and murderers who targeted unsuspecting travelers.

Cameras capture an intense explosion in Ontario, Calif., that rips apart a suburban home and sends panicked onlookers running for their lives; experts investigate and suspect a potential detonation of an enormous cache of illegal fireworks.

A villager captures a moment of horror as a mysterious series of explosions lights up a mountainside in India; experts investigate a possible link to lost plutonium during a Cold War spy mission that went disastrously wrong.

Motorcyclists film a bizarre, elongated humanoid creature walking along a road in Jharkhand, India; experts investigate the violent history behind an organized cult of professional robbers and murderers who targeted unsuspecting travelers.

Cameras capture an intense explosion in Ontario, Calif., that rips apart a suburban home and sends panicked onlookers running for their lives; experts investigate and suspect a potential detonation of an enormous cache of illegal fireworks.

A villager captures a moment of horror as a mysterious series of explosions lights up a mountainside in India; experts investigate a possible link to lost plutonium during a Cold War spy mission that went disastrously wrong.

A vacationing family films waves of fire breaking along the shores of an Indonesian island; experts investigate a possible connection to a classified WWII beach-burning weapon developed by the British to incinerate invading armies.

A stone sphere, a hook and five fragments of wood are the only objects ever discovered inside the Great Pyramid of Giza; experts investigate if they can explain the mysteries behind the only surviving Wonder of the Ancient World.