Cameras capture footage of a ghostly figure in the window of Pablo Escobar's abandoned luxury building, mere moments before it is demolished, and some believe it was the notorious drug lord himself.

When cameras capture footage of a man who appears to lay an egg, some experts wonder if it's evidence that scientists created a human-reptile mutant through gene manipulation; using cutting-edge tech, investigators put this theory to the test.

When cameras record a strange creature in the wilderness perform an incredible feat of strength, some suspect it's hard proof of Bigfoot; using cutting-edge science, experts investigate if they've discovered the spawn of Sasquatch and Iron Man.

Cameras capture footage of a ghostly figure in the window of Pablo Escobar's abandoned luxury building, mere moments before it is demolished, and some believe it was the notorious drug lord himself.

Cameras capture footage of a highway swarmed with snake-like creatures and an unexplained ooze; the latest tech reveals where they came from and their top-secret purpose.

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.

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.

Determining the age of the universe continues to be an elusive endeavor for scientists as their results are conflicting, and without a definitive answer, everything that's known about the cosmos could be completely wrong.

As the two Voyager spacecraft reach interstellar space, experts explore their astonishing discoveries and how their extended operation has transformed into the ultimate mission.

In a fictional scenario set in 2029, an asteroid hurtling towards Earth at 40,000 mph will reduce New York to ashes; examining the hypothetical, experts weigh in to determine what could happen, and how it might be stopped.

New discoveries have revealed thousands of exoplanets beyond the solar system, and some resemble earth enough that one could be a new home for humanity; with cutting-edge technology, finding the perfect one is the scientific challenge of the age.

Earth's history is marked by one cosmic disaster after another, forging the path of human evolution; now, experts explore how the Earth has teetered on the verge of destruction.

For centuries, concert halls have been precisely designed and engineered to shape the best possible sound for acoustic performance; now, experts use state-of-the-art science to discover how the next generation of concert halls could be constructed.

Machu Picchu is one of the greatest landmarks of world architecture, yet the purpose of its construction and how it was built still remains a mystery; experts use cutting-edge engineering to reveal what it would take to rebuild this legendary city.

Stonehenge is an astonishing achievement of ancient construction that continues to baffle engineers thousands of years later; now, experts use the latest science to discover the logistics behind erecting another legendary monument today.

The Parthenon is the crowning jewel of ancient Greek architecture and it was engineered according to a mysterious mathematical formula; expert builders examine the secrets of its design and investigate if modern-day methods could rebuilt it.

Experts investigate clues revealing evidence of a long-lost civilization in the Amazon that built giant cities of untold treasures.

Archaeologists are finding hard proof of the prehistoric civilization that once thrived in the Amazon; with the help of cutting-edge technology, these new discoveries reveal how these long-lost people built an advanced society in the jungle.

New discoveries reveal the mystery of what happened to the ancient superpower that once thrived in the Amazon jungles and, using cutting-edge archaeological methods, finding the reasons why the civilization fell.

Victor Vescovo's team searches for the deepest point of the Atlantic Ocean.

Victor Vescovo's team searches for the deepest point of the Southern Ocean.

Victor Vescovo and his team head to the Indian Ocean.

Victor Vescovo's team takes on the Mariana Trench in the Pacific Ocean.

Victor Vescovo's team concludes its mission in the Arctic Ocean.

In 2011, a catastrophic nuclear disaster forced the immediate evacuation of Fukushima, Japan; a team of scientists uses hundreds of cameras to track and investigate the astonishing wildlife that now thrives in this deadly, radioactive environment.

Victor Vescovo's team takes on the Mariana Trench in the Pacific Ocean.

Victor Vescovo's team concludes its mission in the Arctic Ocean.

In 2011, a catastrophic nuclear disaster forced the immediate evacuation of Fukushima, Japan; a team of scientists uses hundreds of cameras to track and investigate the astonishing wildlife that now thrives in this deadly, radioactive environment.

Victor Vescovo and his team head to the Indian Ocean.

Archaeologists are finding hard proof of the prehistoric civilization that once thrived in the Amazon; with the help of cutting-edge technology, these new discoveries reveal how these long-lost people built an advanced society in the jungle.

New discoveries reveal the mystery of what happened to the ancient superpower that once thrived in the Amazon jungles and, using cutting-edge archaeological methods, finding the reasons why the civilization fell.

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

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

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

The hidden kingdom of microscopic alien organisms shapes the universe as much as galaxies, stars, and planets; new discoveries reveal how bacteria, viruses and other micro-organisms built life on Earth and influence humanity's future in the cosmos.

An explosion in the discovery of exoplanets is challenging everything we know about our universe; experts use cutting-edge astronomy to investigate these mysterious alien worlds and how they defy the laws of physics.

Jeremy Wade takes a fresh look at the Battle of Actium; Jeremy investigates what could be the first recorded case of a whale rescuing a human.

Jeremy Wade examines new evidence that could finally reveal what happened to aviator Amelia Earhart; Jeremy investigates a strange anchor found in the Mediterranean Sea.

Jeremy Wade explores an accident involving a Russian nuclear submarine on a top-secret mission, and shocking details emerge surrounding the vessel's design; scientists investigate ancient human remains emerging from a lake in Finland.

Jeremy Wade follows investigators as they dive the wreck of the ferry MS Estonia; the case of America's notorious skyjacker DB Cooper takes an intriguing underwater twist.

Exploring the puzzling disappearance of an Indonesian submarine; the latest research into an underwater phenomenon may help piece together how it vanished.

Jeremy Wade investigates the infamous shipwreck of the Titanic; locals are baffled when a bag containing 54 severed human hands is found on the banks of a Siberian river.

Jeremy Wade explores a shipwreck that may contain stolen Nazi treasure, the priceless lost furnishings of the 18th century Amber Room; astonishing footage captures the exact moment when freight ship MV Arvin split in two and sank in the Black Sea.

The ruins of a dreamlike Polish palace hide an astonishingly dark history that's shrouded in mystery to this day; experts investigate and uncover an ornate gothic structure that concealed a nightmare of Nazi experimentation.

A strange sea fortress that guards icy waters is home to a grim secret; experts investigate the mysteries at this eerie structure, which fought an invisible enemy far more deadly than ever imagined.

A collection of ramshackle structures with a mystical facade lie mysteriously deserted on the tropical island of Bali; experts investigate and uncover the ruins of a bizarre amusement park complex with a disastrous past.

A war-torn Italian ghost town immortalized by a legendary Hollywood director blurs the lines between fiction and reality; experts investigate and uncover a forgotten landscape of ruins captured in a WWII documentary.

The world's abandoned structures hold new evidence about the lives and deeds of history's greatest heroes and villains and using the latest discoveries at these mysterious sites, experts count down the 10 most significant ones.

A war-torn Italian ghost town immortalized by a legendary Hollywood director blurs the lines between fiction and reality; experts investigate and uncover a forgotten landscape of ruins captured in a WWII documentary.

The world's abandoned structures hold new evidence about the lives and deeds of history's greatest heroes and villains and using the latest discoveries at these mysterious sites, experts count down the 10 most significant ones.

A collection of ramshackle structures with a mystical facade lie mysteriously deserted on the tropical island of Bali; experts investigate and uncover the ruins of a bizarre amusement park complex with a disastrous past.

Jeremy Wade investigates the infamous shipwreck of the Titanic; locals are baffled when a bag containing 54 severed human hands is found on the banks of a Siberian river.

Jeremy Wade explores a shipwreck that may contain stolen Nazi treasure, the priceless lost furnishings of the 18th century Amber Room; astonishing footage captures the exact moment when freight ship MV Arvin split in two and sank in the Black Sea.

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.

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

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.

The heart of the M87 supermassive black hole, the first and only black hole ever photographed; the mystery of how it grew so large, what lies inside, and how it controls the entire galaxy.

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.

The universe's stars are dying off faster than new ones are born; using the latest technology, experts investigate the secrets of the last stars of the cosmos and what this stellar apocalypse means for life on Earth.

The horrifying remains of the Screaming Mummy have haunted archaeologists for decades, but experts uncover new evidence to reveal the treacherous conspiracy that led to the mummy's grisly end.

The mangled mummy of a pharaoh is a 3,000-year-old cold case that has brand-new leads; a team of experts in Egyptian archaeology and criminal forensics investigates fresh evidence to discover the truth behind the brutal death.

Cutting-edge science reveals new discoveries about the mutilated mummy of a young woman with a secret link to Tutankhamun; as experts use modern-day criminal forensics to follow fresh leads, the bloody trail leads straight to the Boy King.

A brand-new discovery inside a 3,000-year-old treasure chest may lead experts to the Egyptian pharaoh who was erased from history: a woman named Hatshepsut, who was one of the most controversial and successful pharaohs of all time.

Leading scientists and Egyptologists use state-of-the-art forensics to investigate the Niagara Falls mummy and search for its true identity; how a legendary ancient Egyptian pharaoh ended up on the other side of the world.

The mysterious mummy of Ramesses V reveals a shocking tale of bitter family rivalry, civil insurrection and a cause of death that ultimately pushed ancient Egypt to the edge of collapse.

When satellites spot a mysterious structure in North Korea, experts investigate if this sinister evidence points to a looming nuclear threat, and using cutting-edge tech, they reveal dark secrets from this strange place.

A strange circular forest next to a notorious cannibal site; when an eerie crater is spotted in Siberia, experts uncover if it could be evidence of Nikola Tesla's doomsday device; cutting-edge tech helps experts answer these sinister mysteries.

An abandoned ghost town in a remote desert with a dark past; when a strange facility is spotted in Russia, experts investigate if it's hiding evidence of alien life; cutting-edge tech reveals new clues to these sinister mysteries from space.

A site that could be the Garden of Eden hides a deadly secret; when a gateway to hell suddenly opens, experts investigate where it leads; a mysterious shipwreck could be an infamous Soviet KGB pirate ship.

When a sinister cave is discovered in a remote corner of Iceland, experts uncover a secret underworld tunneling to unknown depths, and using cutting-edge tech, they investigate if this strange place could hold secrets of alien worlds.

An abandoned ghost town in a remote desert with a dark past; when a strange facility is spotted in Russia, experts investigate if it's hiding evidence of alien life; cutting-edge tech reveals new clues to these sinister mysteries from space.

A site that could be the Garden of Eden hides a deadly secret; when a gateway to hell suddenly opens, experts investigate where it leads; a mysterious shipwreck could be an infamous Soviet KGB pirate ship.

When a sinister cave is discovered in a remote corner of Iceland, experts uncover a secret underworld tunneling to unknown depths, and using cutting-edge tech, they investigate if this strange place could hold secrets of alien worlds.

A strange circular forest next to a notorious cannibal site; when an eerie crater is spotted in Siberia, experts uncover if it could be evidence of Nikola Tesla's doomsday device; cutting-edge tech helps experts answer these sinister mysteries.

A brand-new discovery inside a 3,000-year-old treasure chest may lead experts to the Egyptian pharaoh who was erased from history: a woman named Hatshepsut, who was one of the most controversial and successful pharaohs of all time.

Leading scientists and Egyptologists use state-of-the-art forensics to investigate the Niagara Falls mummy and search for its true identity; how a legendary ancient Egyptian pharaoh ended up on the other side of the world.

Adam and Jamie test ninja myths; they try to determine whether the one-inch punch really works and if a ninja can catch an arrow in mid-air.

The team tests four myths.

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

Former CIA operative Mike Baker investigates top-secret government programs steeped in cutting-edge science; Mike speaks with experts, government officials and scientists to go deeper into the black files than ever before.

Many U.S. government personnel have reported sustaining unexplained and debilitating neurological injuries while working abroad; Mike Baker investigates if these invisible, mind-altering attacks are evidence of active mind-control programs worldwide.

In the aftermath of the 9/11 attacks, a series of secret meetings were reported between US military brass and Hollywood filmmakers.

Uncovered documents reveal a black file containing studies of werewolves, sprites and floating orbs; Mike Baker investigates how the U.S. government may have funded a classified program directly focused on the research of paranormal phenomena.

An image of a pilot donning a Red Eagles patch is captured by photographers during a mysterious fighter jet training exercise; Mike Baker investigates if the U.S. Air Force has revived a black file squadron.

Unidentified black triangles have been reported in flight over top-secret military bases for decades, and now, Mike Baker investigates if the US government is involved in developing experimental aircraft, or if this could be something otherworldly.

Presidential Emergency Action Documents have the potential to grant the U.S. president unlimited authority; Mike Baker investigates how these files are among the most secretive documents in U.S. government and what might trigger their use.

In 2013, the USS Jimmy Carter deployed on a classified mission that received a presidential citation of heroism, and now, Mike Baker investigates how this attack submarine may be connected to one of the most daring black file operations in US history.

The Roman Empire fell in the year 476, yet questions linger; did it truly fall or does it continue as the Byzantine Empire? What caused its demise? The debate remains controversial even among modern historians.

El Dorado, the legendary city of gold, captivated Europeans in the 16th and 17th centuries, sparking endless quests for hidden treasures; fueled by greed, these expeditions led to the loss of countless lives.

Rameses II led Egypt through a sixty-year golden age as a powerful pharaoh; despite his recorded achievements, researchers investigate lingering mysteries regarding his wife Nefertari and his death.

Tutankhamun, Egypt's teenage pharaoh, leaves an enduring legacy in the 10 short years he ruled; given questions surrounding his untimely death, Tutankhamun remains one of history's enigmas.

Mary Magdalene appears twelve times in the Gospels yet remains a controversial figure; this exploration examines the wide variety of depictions and the limited historical facts known about her.

In 1532, Spanish conquistadors encounter the advanced Inca Empire; despite their sophisticated infrastructure, the Inca falls within decades; the story of how a powerful empire is overtaken by a small group of conquistadors remains mysterious.

The ten plagues of Egypt are supposedly sent by God to convince Pharaoh to free the Israelites; some scientists link these events to a volcanic eruption or climate change; could these be natural occurrences or are they divine warnings?

Mary Magdalene appears twelve times in the Gospels yet remains a controversial figure; this exploration examines the wide variety of depictions and the limited historical facts known about her.

In 1532, Spanish conquistadors encounter the advanced Inca Empire; despite their sophisticated infrastructure, the Inca falls within decades; the story of how a powerful empire is overtaken by a small group of conquistadors remains mysterious.

The ten plagues of Egypt are supposedly sent by God to convince Pharaoh to free the Israelites; some scientists link these events to a volcanic eruption or climate change; could these be natural occurrences or are they divine warnings?

Tutankhamun, Egypt's teenage pharaoh, leaves an enduring legacy in the 10 short years he ruled; given questions surrounding his untimely death, Tutankhamun remains one of history's enigmas.

In 2013, the USS Jimmy Carter deployed on a classified mission that received a presidential citation of heroism, and now, Mike Baker investigates how this attack submarine may be connected to one of the most daring black file operations in US history.

The Roman Empire fell in the year 476, yet questions linger; did it truly fall or does it continue as the Byzantine Empire? What caused its demise? The debate remains controversial even among modern historians.

Adam and Jamie take a fan mail film and use it to dial in on a phone book fable; the rest of the team test a fishy tale of Hollywood pyrotechnics with their own big bang theories.

The team examines viral videos from the internet; they try to find out if people truly believe what they see.

Jamie and Adam try to tenderize steak with explosives; they test to see if a motorist uses more fuel when driving under stress.

A look into the processes behind hospital laundry, brass instrument restoration, horse replicas and excavation.

Ceramic fireplaces; synthetic corks; parking garage floor slabs.

Examining how items like oil pressure sensors, large format printing and heavy equipment simulators are made.

Examines how items such as mobile concert stages, mascara, continuous miners and wood gift boxes are manufactured.

Find out how wood slat baskets, bells, and gyroscopic stabilizers are made.

DeLorean restoration; bison fibre; shuffleboard tables; friction-forged knives.

Explores the production processes of leather overnight bags, horse exercisers, air hockey tables and copper sculptures.

How electrophoretic displays, dry-erase boards, air rifles, and quartz countertops are made.

How flying water bikes, paint and cinnamon cordial are made.

How berets, pastis and stationary bikes are made.

An insight into how steel bistro furniture, letterpress printing, bamboo ceramic lights and asphalt compactors are made.

Technological corks; zinc gutters; traditional ham; chisteras.

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 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.

A colossal stone temple on a remote Egyptian island mysteriously bears the names of the most famous leaders of the ancient world; now, experts use cutting-edge tech to investigate why pharaohs and emperors all built monuments at this enigmatic site.

The ancient city of Abydos contains some of the oldest Egyptian tombs and a buried temple linked to a mysterious death cult; now, archaeologists use cutting-edge drone imaging to investigate long-hidden secrets behind the first pharaohs.

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.

Experts examine declassified documents to uncover the true story behind the worst nuclear disaster in history.

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.

Experts examine declassified documents to uncover the true story behind the worst nuclear disaster in history.

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.