The lost city of Olous: A great metropolis submerged in the Mediterranean; archaeologists uncover its secrets using pioneering technology and CGI reconstruction.

When a person's day job involves the oversight of missile silos, nuclear facilities or a military base, the last complication they want to deal with is a close encounter with a UFO; here, an already frightening phenomenon turns positively chilling.

Will Kirk and Christina Trevanion take their mobile auction house on the road.

Meeting Dr. Cori Stephen and Dr. Allison Hay, two vets in two different locations; one resides in the country and the other in the city, but both share their passion for keeping animals, from foxes to pet pigs, happy and healthy.

Dr. Emma Jackson takes on a new role at one of Calgary's busiest animal rescue shelters; Dr. Allison's love for cats shines through as she provides emergency surgery on an ageing cat with a broken leg.

Evidence of female power in ancient Kush; secrets long buried in a New Mexico pueblo; a find near the Nazca Lines in Peru; mysteries in Cambodia's Angkor Wat.

After a 2,500-year-old mummy is discovered in Siberia, locals report strange, cataclysmic events that point to an ancient curse; using cutting-edge archaeology, experts reveal who this person was and if they've unleashed something sinister.

The winter season grows more erratic, and Alaskans are forced to adapt.

Hitting rewind on a previous nail-biting finale; testing knowledge of Julia Roberts films; seeing what a mum of three knows about Narnia; a tennis trivia test; locking in a win on the science jackpot question.

Guest comic Gary Anthony Williams.

Guest star appearance by Maggie Q; guest comic Nyima Funk.

A luxurious resort outpost for the German elite now lies derelict in the highlands of Argentina; experts investigate and uncover a sprawling vacation estate for Nazi sympathizers that was once a struggling hotel.

A ghost town shows a revitalization along an iconic American highway.

The Bahamas get pounded by 200mph winds during category five Hurricane Dorian - the most intense cyclone the country has ever seen; in Arizona, flash flooding sweeps a couple away resulting in a heart-stopping rescue.

After a 2,500-year-old mummy is discovered in Siberia, locals report strange, cataclysmic events that point to an ancient curse; using cutting-edge archaeology, experts reveal who this person was and if they've unleashed something sinister.

Guest comic Gary Anthony Williams.

Guest star appearance by Maggie Q; guest comic Nyima Funk.

Will Kirk and Christina Trevanion take their mobile auction house on the road.

Evidence of female power in ancient Kush; secrets long buried in a New Mexico pueblo; a find near the Nazca Lines in Peru; mysteries in Cambodia's Angkor Wat.

Joining Graham on his sofa are actor Ewan McGregor, actress and singer Kate Hudson, actress Naomie Harris and actor and comedian Chris O'Dowd; Self Esteem performs her single Focus Is Power.

Caroline Aherne narrates as some of Britain's most opinionated viewers comment freely.

Chief Brett Lovegrove, former Head of Counter Terrorism for City of London Police, runs a team of 30 hunters, carefully selected from law enforcement, military intelligence and human tracking; their first fugitive is Dr. Ricky Allen from Kent.

Joining Graham on his sofa are actor Ewan McGregor, actress and singer Kate Hudson, actress Naomie Harris and actor and comedian Chris O'Dowd; Self Esteem performs her single Focus Is Power.

Caroline Aherne narrates as some of Britain's most opinionated viewers comment freely.

Chief Brett Lovegrove, former Head of Counter Terrorism for City of London Police, runs a team of 30 hunters, carefully selected from law enforcement, military intelligence and human tracking; their first fugitive is Dr. Ricky Allen from Kent.

The Bahamas get pounded by 200mph winds during category five Hurricane Dorian - the most intense cyclone the country has ever seen; in Arizona, flash flooding sweeps a couple away resulting in a heart-stopping rescue.

A luxurious resort outpost for the German elite now lies derelict in the highlands of Argentina; experts investigate and uncover a sprawling vacation estate for Nazi sympathizers that was once a struggling hotel.

Uncover a vast underground city in Turkey that served as a refuge for Christians and Jews. Investigate a mysterious chalk chamber in England, visit a secret Etruscan complex beneath an Italian wine cellar, and map an ancient tunnel network in Iran.

A powerful, twisting tornado appears beneath the ocean; frozen lizards littering the streets.

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

Visit Cambodia, where record droughts have left a trade hub exposed; examine a submerged funerary complex in Greece, ancient mammal footprints preserved by a Turkish volcanic eruption and North American fossils from the post-dinosaur era.

On Aug. 10, 2020, hurricane-force winds blast through Iowa battering the city of Cedar Rapids; this rare Derecho packing powerful straight line winds takes the city by surprise and leaves behind a trail of destruction.

A trio of elite private investigators armed with the latest in high-tech tools, high-performance vehicles, martial arts techniques and an array of disguises unleash their state-of-the-art skills on land, sea and air to track down a kidnapped billionaire-to-be and keep his top-secret voice-identification software out of lethal hands. They're beautiful, they're brilliant, and they work for Charlie. In "Charlie's Angels," a sexy, high-octane update of the original '70s action-comedy TV series.

Improv veterans Ryan Stiles, Wayne Brady and Colin Mochrie return for a new take on the comedy series with host, Aisha Tyler. Each episode, a special guest star joins the comics as they tackle a series of spontaneous improvised sketches, with only a few random ideas from the studio audience and their host. With little information and a lot of imagination, the comics depict a variety of characters and scenes, and even perform songs. At the end of each round, Aisha awards points to each of the four performers and announces a winner at the end of every episode.

Improv veterans Ryan Stiles, Wayne Brady and Colin Mochrie return for a new take on the comedy series with host, Aisha Tyler. Each episode, a special guest star joins the comics as they tackle a series of spontaneous improvised sketches, with only a few random ideas from the studio audience and their host. With little information and a lot of imagination, the comics depict a variety of characters and scenes, and even perform songs. At the end of each round, Aisha awards points to each of the four performers and announces a winner at the end of every episode.

A trio of elite private investigators armed with the latest in high-tech tools, high-performance vehicles, martial arts techniques and an array of disguises unleash their state-of-the-art skills on land, sea and air to track down a kidnapped billionaire-to-be and keep his top-secret voice-identification software out of lethal hands. They're beautiful, they're brilliant, and they work for Charlie. In "Charlie's Angels," a sexy, high-octane update of the original '70s action-comedy TV series.

Joining Graham on his sofa are actor Ewan McGregor, actress and singer Kate Hudson, actress Naomie Harris and actor and comedian Chris O'Dowd; Self Esteem performs her single Focus Is Power.

Caroline Aherne narrates as some of Britain's most opinionated viewers comment freely.

Sandi Toksvig takes a look at upbringing with Sally Phillips, Josh Pugh, Aaron Simmonds and Alan Davies.

Zoe Lyons, Dan Tiernan, and Josh Widdicombe join Sandi.

Will Kirk and Christina Trevanion take their mobile auction house on the road.

Contestants compete across the series, scoring points by answering questions correctly; they must avoid the impossible answers, otherwise they will be eliminated until the next day.

Sandi Toksvig takes a look at upbringing with Sally Phillips, Josh Pugh, Aaron Simmonds and Alan Davies.

Zoe Lyons, Dan Tiernan, and Josh Widdicombe join Sandi.

Uncover a vast underground city in Turkey that served as a refuge for Christians and Jews. Investigate a mysterious chalk chamber in England, visit a secret Etruscan complex beneath an Italian wine cellar, and map an ancient tunnel network in Iran.

A trio of elite private investigators armed with the latest in high-tech tools, high-performance vehicles, martial arts techniques and an array of disguises unleash their state-of-the-art skills on land, sea and air to track down a kidnapped billionaire-to-be and keep his top-secret voice-identification software out of lethal hands. They're beautiful, they're brilliant, and they work for Charlie. In "Charlie's Angels," a sexy, high-octane update of the original '70s action-comedy TV series.

A ship blocks the most important route in global trade; a strange Scottish creature chases a mountaineer; mystery lights stalk allied pilots in Nazi Germany; determining if these are tricks of the mind or wild weather.

A new theory about the sinking of the Titanic emerges; a treeless circle in the middle of the woods is probed; a formation of giant whale bones is discovered sticking out of the ground; researchers study the loudest sound ever recorded underwater.

Uncover a vast underground city in Turkey that served as a refuge for Christians and Jews. Investigate a mysterious chalk chamber in England, visit a secret Etruscan complex beneath an Italian wine cellar, and map an ancient tunnel network in Iran.

Visit Cambodia, where record droughts have left a trade hub exposed; examine a submerged funerary complex in Greece, ancient mammal footprints preserved by a Turkish volcanic eruption and North American fossils from the post-dinosaur era.

A ship blocks the most important route in global trade; a strange Scottish creature chases a mountaineer; mystery lights stalk allied pilots in Nazi Germany; determining if these are tricks of the mind or wild weather.

On Aug. 10, 2020, hurricane-force winds blast through Iowa battering the city of Cedar Rapids; this rare Derecho packing powerful straight line winds takes the city by surprise and leaves behind a trail of destruction.

Will Kirk and Christina Trevanion take their mobile auction house on the road.

Just after shuttering many businesses in response to the pandemic, Jonesboro, Ark., takes another hit from a natural disaster; an EF3 tornado touches down on the south side of the city and plows across the busiest parts of Jonesboro.

Dr. Cori puts on a smile for her least favorite job, cow pregnancy testing; Dr. Allison treats an orange cat with a skin condition and uses a musical trick to calm the nerves of a soon-to-be neutered dog.

Dr. Emma sets off on a road trip to Siksika Nation to help stray dogs get healthy and find their forever homes; in Saskatoon, Dr. Allison examines a worrying lump on an older dog with a big personality.

Visit Cambodia, where record droughts have left a trade hub exposed; examine a submerged funerary complex in Greece, ancient mammal footprints preserved by a Turkish volcanic eruption and North American fossils from the post-dinosaur era.

A new theory about the sinking of the Titanic emerges; a treeless circle in the middle of the woods is probed; a formation of giant whale bones is discovered sticking out of the ground; researchers study the loudest sound ever recorded underwater.

Rachel and Grenville sell heirlooms to fund a honeymoon after a tragic diagnosis; Izzie examines a historic swagger stick, while Robin sells a restored croquet set.

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

Lt. Ryan Graves and pilots in his squadron detect and engage with UFOs on multiple occasions; he gave a detailed description of regular encounters that flight teams had with a black box UFO they were seeing every day.

Caroline Aherne narrates as some of Britain's most opinionated viewers comment freely.

Guest star appearance by Maggie Q; guest comic Nyima Funk.

Improv veterans Ryan Stiles, Wayne Brady and Colin Mochrie return for a new take on the comedy series with host, Aisha Tyler. Each episode, a special guest star joins the comics as they tackle a series of spontaneous improvised sketches, with only a few random ideas from the studio audience and their host. With little information and a lot of imagination, the comics depict a variety of characters and scenes, and even perform songs. At the end of each round, Aisha awards points to each of the four performers and announces a winner at the end of every episode.

Chief Brett Lovegrove, former Head of Counter Terrorism for City of London Police, runs a team of 30 hunters, carefully selected from law enforcement, military intelligence and human tracking; their first fugitive is Dr. Ricky Allen from Kent.

Will Kirk and Christina Trevanion take their mobile auction house on the road.

Host Anthony Burke meets a big city couple aiming to bring a slouching country town mansion back to the burnished glory of its gold rush years.

Caroline Aherne narrates as some of Britain's most opinionated viewers comment freely.

Chief Brett Lovegrove, former Head of Counter Terrorism for City of London Police, runs a team of 30 hunters, carefully selected from law enforcement, military intelligence and human tracking; their first fugitive is Dr. Ricky Allen from Kent.

Scattered around the world are long-forgotten engineering marvels, decaying cities and empty factories that once stood on the cutting edge of design and construction. Today they are discarded, dangerous, and some of them are even deadly. "Mysteries of the Abandoned" reveals why these engineering triumphs were built and how they were left to crumble. In each hourlong episode, stories tell of who originally designed the structure, its historical significance, and why it was ultimately no longer viable. California's Goat Canyon Trestle railway, Pennsylvania's Kinzua Viaduct steel bridge, the Grand Goulets Road in the French Alps, and Hashima Island, a once thriving and now deserted Japanese island, are among episode subjects.

A notorious tragedy leads to one of the darkest chapters in early American history; in 1692, fear rips through the small town of Salem, Massachusetts; accusations fly and many people are put to death.

Margot, Matty, Billy, Emile and Gilbert begin work on their new northern homesteads.

Scattered around the world are long-forgotten engineering marvels, decaying cities and empty factories that once stood on the cutting edge of design and construction. Today they are discarded, dangerous, and some of them are even deadly. "Mysteries of the Abandoned" reveals why these engineering triumphs were built and how they were left to crumble. In each hourlong episode, stories tell of who originally designed the structure, its historical significance, and why it was ultimately no longer viable. California's Goat Canyon Trestle railway, Pennsylvania's Kinzua Viaduct steel bridge, the Grand Goulets Road in the French Alps, and Hashima Island, a once thriving and now deserted Japanese island, are among episode subjects.

A notorious tragedy leads to one of the darkest chapters in early American history; in 1692, fear rips through the small town of Salem, Massachusetts; accusations fly and many people are put to death.

Investigating significant historic and contemporary sites from the revealing vantage points of drone, satellite and aerial photography.

The winter season grows more erratic, and Alaskans are forced to adapt.

Chief Brett Lovegrove, former Head of Counter Terrorism for City of London Police, runs a team of 30 hunters, carefully selected from law enforcement, military intelligence and human tracking; their first fugitive is Dr. Ricky Allen from Kent.

A notorious tragedy leads to one of the darkest chapters in early American history; in 1692, fear rips through the small town of Salem, Massachusetts; accusations fly and many people are put to death.

A ship blocks the most important route in global trade; a strange Scottish creature chases a mountaineer; mystery lights stalk allied pilots in Nazi Germany; determining if these are tricks of the mind or wild weather.

A question on US state capitals; a tense showdown over extinct animals; a James Bond fan who outwits and outguns the competition to snag the first 10,000-pound win of the series.

Caroline Aherne narrates as some of Britain's most opinionated viewers comment freely.

Guest comic Gary Anthony Williams.

Guest comics Brad Sherwood and Jeff Davis.

A question on US state capitals; a tense showdown over extinct animals; a James Bond fan who outwits and outguns the competition to snag the first 10,000-pound win of the series.

In Guatemala, archaeologists identify an ancient site containing a series of unknown structures; a lake full of jellyfish is studied on a remote South Pacific island; Argentinian researchers discover a complex that may have a dark past.

In the rain forests of Belize, researchers find a bizarre skeleton deep underground in a mysterious cave; an ancient city is discovered on a remote plateau in Cambodia; a strange coin is unearthed on the Wessel Islands of Australia.

On the island of Madagascar, paleontologists discover an intact fossil unlike any known animal, living or extinct; bizarre stone spheres are discovered in Costa Rica; the curious remains of a small man are found in Chiapas, Mexico.

Archaeologists working at the Templo Mayor temple complex in Mexico, which was once located at the very centre of the Aztec Empire, unearth a chilling find, a tower made of over 600 human skulls.

Jennifer teams up with cryptozoologist Andrew Sanford to investigate newly surfaced evidence of Bigfoot.

Jennifer heads to New Orleans to investigate whether an ancient vampire has cracked the code on immortality.

Getting insight into the last moments of England's King Richard III; deciphering a manuscript hiding taboo 15th-century knowledge; spotting indications of human sacrifice in Scotland; inspecting silver coins tied to turbulent times in Eastern Europe.

Ancient tombs and their protectors hold secrets of lost civilizations and legends.

Uncover discoveries that threaten to shatter our understanding of the past; each new discovery confronts our fascination and fear for what is hidden, illuminating the darkest recesses of history.

An expedition on Europe's tallest mountain unearth a decapitated human body; experts uncover a mummified Russian WWII soldier near a wartime shelter.

The science behind some of the most incredible engineering accidents ever filmed is revealed; a look at the physics involved as well as forensic details to explain the slip-ups that turned construction into destruction.

Sweep away the debris in a Bronze Age village preserved by fire; open ancient sarcophagi found amid the rubble of Notre Dame; discover a grave hidden in a Canadian farmer's arid field; get intel on ancient climate change in a California tar pit.

Wind-fuelled blazes in a snow-blanketed Colorado town; stranded restaurant workers in frigid temperatures; a flash flood rages beneath a family's truck; over 40 twisters over two days in Alabama.

The science behind some of the most incredible engineering accidents ever filmed is revealed; a look at the physics involved as well as forensic details to explain the slip-ups that turned construction into destruction.

Sweep away the debris in a Bronze Age village preserved by fire; open ancient sarcophagi found amid the rubble of Notre Dame; discover a grave hidden in a Canadian farmer's arid field; get intel on ancient climate change in a California tar pit.

A notorious tragedy leads to one of the darkest chapters in early American history; in 1692, fear rips through the small town of Salem, Massachusetts; accusations fly, and many people are put to death.

Jennifer teams up with cryptozoologist Andrew Sanford to investigate newly surfaced evidence of Bigfoot.

Jennifer heads to New Orleans to investigate whether an ancient vampire has cracked the code on immortality.

Experts uncover four global stories of extraordinary curiosities that were once concealed in the deserts of the planet.

Guest comic Gary Anthony Williams.

Guest comics Brad Sherwood and Jeff Davis.

Contestants compete across the series, scoring points by answering questions correctly; they must avoid the impossible answers, otherwise they will be eliminated until the next day.

Caroline Aherne narrates as some of Britain's most opinionated viewers comment freely.

Guest comic Gary Anthony Williams.

Special guests Penn & Teller.

Contestants compete across the series, scoring points by answering questions correctly; they must avoid the impossible answers, otherwise they will be eliminated until the next day.

The origins of a colossal image of a man carved into the red sands of Central Australia; mysterious mummies and peculiar whale bones resting in two different parts of Chile's Atacama Desert; a lost Egyptian tomb.

Discover 10 preserved Byzantine-era crocodiles on the banks of the Nile; untangle the puzzle of the Namib Desert's grass circles; locate the remnants of a lost foreign-ruled city in Egypt and solve the riddle of Peru's Band of Holes.

Investigating an odd phenomenon that makes rocks slide across Death Valley; learning how pieces of jade rewrite Chinese history; examining animal bones that could show an earlier human arrival in the Americas; visiting Earth's oldest stone circle.

Preserved in the ice of Mexico's highest peak, a group of climbers stumble upon the bizarre, mummified remains of a man in a pinstripe business suit; experts uncover possible drug cartel connections and a plane crash shrouded in secrecy.

A salvage team discovers the mysterious remains of an enormous shipwreck near Cambridge Bay in the icy waters of the Canadian Arctic; experts investigate and uncover a cutting-edge vessel with links to one of the greatest polar explorers in history.

Mountain climbers in California find the body of a U.S. Army soldier; strange bundles of canvas and wood are discovered on an Alaskan mountain; volcanic glass is found in an unexpected place; a vital World War II weather station is uncovered.

Scientists, historians and archeologists attempt to unravel mysteries of history.

Following the debate about Egypt's visionary warrior king, who ruled the country for more than 60 years; learning why scholars can't pin down the origin of his wife, Nefertiti and dig into the strange circumstances surrounding his death at age 90.

Learn who sailed on a sunken, treasure-filled pirate ship and who invoked the devil on a medieval curse tablet; Investigate 17 mini-coffins that have puzzled Scottish historians since 1836 and look inside a mysterious well of bones in Athens.

Archaeologists working at the Templo Mayor temple complex in Mexico, which was once located at the very centre of the Aztec Empire, unearth a chilling find, a tower made of over 600 human skulls.

Uncover discoveries that threaten to shatter our understanding of the past; each new discovery confronts our fascination and fear for what is hidden, illuminating the darkest recesses of history.

Chief Brett Lovegrove, former Head of Counter Terrorism for City of London Police, runs a team of 30 hunters, carefully selected from law enforcement, military intelligence and human tracking; their first fugitive is Dr. Ricky Allen from Kent.

A remote island near Peru, besieged by a violent rebellion; a peaceful refuge in Nevada, that offered hope to its occupants; a French worker's paradise, seized by an invading force; and a rural Italian settlement trapped in a downward spiral.

Look at a New Jersey complex that once housed a military lab targeted by Soviet spies; examine a scarred Welsh coastline exploited for building materials; trek to a Greek WWII disaster site and a Peruvian palace with a dark secret.

A London tunnel complex from World War II and a New Jersey aviation disaster site are explored; the tour includes a former English industrial center and an Italian forest with unmarked graves.

An enormous fiery vortex in Redding, Calif.; the island nation of Malta loses a natural treasure; a mysterious radioactive hotspot is discovered near Chernobyl; an unknown force lays waste to a mountain forest in Italian Alps.

Investigate an abandoned village in the shifting sands on Dubai's outskirts and a collection of inexplicable stone circles in Colombia; wing your way over a mysterious hilltop tower in Iran and a puzzling purple phenomenon in Chile's Atacama Desert.

Come across a set of disturbingly familiar stone monoliths in Colombia, then explore a lost city in the Sierra Nevada de Santa Marta. Puzzle over an ancient ruin in Corinth, Greece, and explore a mind-blowing old structure on a Maltese island.

Get petrified by cryptic rock structures normally hidden from view; look inside curious dwellings in the Peruvian Andes; visit a sacred monolith in Wyoming's Black Hills; haunt a Turkish stone village; spot an immovable waterfall in Mexico.

Guest comic Gary Anthony Williams.

Special guests Penn & Teller.

Contestants compete across the series, scoring points by answering questions correctly; they must avoid the impossible answers, otherwise they will be eliminated until the next day.

Caroline Aherne narrates as some of Britain's most opinionated viewers comment freely.

Guest comic Jack Osbourne.

Guest comic Keegan-Michael Key.

Contestants compete across the series, scoring points by answering questions correctly; they must avoid the impossible answers, otherwise they will be eliminated until the next day.

Learn who sailed on a sunken, treasure-filled pirate ship and who invoked the devil on a medieval curse tablet; Investigate 17 mini-coffins that have puzzled Scottish historians since 1836 and look inside a mysterious well of bones in Athens.

Archaeologists working at the Templo Mayor temple complex in Mexico, which was once located at the very centre of the Aztec Empire, unearth a chilling find, a tower made of over 600 human skulls.

Uncover discoveries that threaten to shatter our understanding of the past; each new discovery confronts our fascination and fear for what is hidden, illuminating the darkest recesses of history.

In the tropical lowlands of Northern Colombia, a team of scientists discover a massive, unidentified animal vertebra; dozens of jars packed with bones are uncovered in Cambodia; a strange rusted vehicle is found on the small island of Peleliu.

In the remote Cagayan Valley of the Philippines, archaeologists discover the remains of an ancient rhinoceros; a Brazilian island is infested with thousands of deadly vipers; researchers uncover shocking human remains deep in a Kenyan cave.

On the island of Pohnpei in Micronesia, explorers discover ancient structures hidden beneath dense vegetation; a strange glowing forest is discovered in India; an immense tunnel system is investigated in the Brazilian jungle.

This Caribbean mecca for rock legends was envisioned by famous Beatles producer George Martin; although many legendary records were made there, the studio had to close after a series of natural disasters rocked the small island.

In a California desert, a once glittering Hollywood hotspot gets converted into a top-secret interrogation center for POWs; before being shuttered, this high-tech facility gathered reams of valuable wartime intelligence.

A luxurious resort outpost for the German elite now lies derelict in the highlands of Argentina; experts investigate and uncover a sprawling vacation estate for Nazi sympathizers that was once a struggling hotel.

Scientists, historians and archeologists attempt to unravel mysteries of history.

Three men vanish from a remote Scottish lighthouse; dozens of mines explode simultaneously during the Vietnam War, for no apparent reason; ten billion snow crabs disappear from the Bering Sea.

Marvel at the crystal caves and underground chapels of Poland's Wieliczka salt mine. Tour a secret Cold War bunker in England, unearth a 3,400-year-old royal settlement in Egypt, and try to solve the mystery of China's enigmatic Longyou Caves.

This Caribbean mecca for rock legends was envisioned by famous Beatles producer George Martin; although many legendary records were made there, the studio had to close after a series of natural disasters rocked the small island.

Three men vanish from a remote Scottish lighthouse; dozens of mines explode simultaneously during the Vietnam War, for no apparent reason; ten billion snow crabs disappear from the Bering Sea.

Marvel at the crystal caves and underground chapels of Poland's Wieliczka salt mine. Tour a secret Cold War bunker in England, unearth a 3,400-year-old royal settlement in Egypt, and try to solve the mystery of China's enigmatic Longyou Caves.

The fate of Pharaoh Ramses III has long been clouded by rumors of a family plot against him; scientists examine the tomb, uncovering evidence that supports these ancient suspicions.

Reflect on the collapse of this mighty South American society; contemplate how the technologically advanced Inca Empire, which stretched from Ecuador to Chile, was swiftly dismantled and how the evidence of its existence was nearly lost to history.

Tackle questions about a pharaoh's untimely death at age 19; dig into the physical evidence left behind in his tomb and learn why experts haven't sorted out whether he died of natural causes, poisoning or an accident.

Scientists, historians and archeologists attempt to unravel mysteries of history.

Guest comic Jack Osbourne.

Guest comic Keegan-Michael Key.

Contestants compete across the series, scoring points by answering questions correctly; they must avoid the impossible answers, otherwise they will be eliminated until the next day.

Caroline Aherne narrates as some of Britain's most opinionated viewers comment freely.

Guest comedian Rachel Bloom.

Guest comic Mircea Monroe.

Contestants compete across the series, scoring points by answering questions correctly; they must avoid the impossible answers, otherwise they will be eliminated until the next day.

A frozen lake deep in the Himalayas melts once a year to expose hundreds of human bones and a centuries-old mystery of astonishing carnage; leaving experts to speculate if it was a single catastrophic event or something much more sinister.

A top-secret military base hidden deep in the ice beyond the Arctic Circle is one of the Cold War's most elaborate cover-ups; recently declassified documents reveal its deadly purpose; the threat it might still pose to all humankind.

Experts make a chilling new discovery when they unearth a 30,000-year-old zombie virus from an icy grave; if this ancient disease is successfully resuscitated back to life, it could cause a catastrophic global calamity.

Connect the Great Pyramid to an archeological find near the Suez Canal, then unveil the secrets of colossal rock sculptures in Saudi Arabia. Gaze at a mystical geological formation deep in the Sahara and unmask a 37-million-year-old Egyptian enigma.

Travel to Cairo to examine a stunning find under the Pyramid of Unas' watchful eye. Search for a 16th-century Portuguese shipwreck in the Namib Desert, unearth a WW II plane that crashed in the Sahara, and study a fossilized missing link in Taiwan.

Ancient human remains believed to belong to a great hunter are discovered in the Peruvian highlands. In Tunisia, the ruins of a legendary lost Roman city may have finally been found. Strange sounds emanating from sand dunes in the Mongolian desert are investigated. A huge collection of human and animal bones is discovered in a cave in Saudi Arabia.

A golden-eyed priestess sparks myths of mystical powers and deep-rooted local folklore.

Uncovering the mystery of the Holy Grail.

Reflect on the collapse of this mighty South American society; contemplate how the technologically advanced Inca Empire, which stretched from Ecuador to Chile, was swiftly dismantled and how the evidence of its existence was nearly lost to history.

Tackle questions about a pharaoh's untimely death at age 19; dig into the physical evidence left behind in his tomb and learn why experts haven't sorted out whether he died of natural causes, poisoning or an accident.

A grim discovery in a Swedish lake reveals ancient practices; in the Canadian Arctic, the fossil of a previously unknown mammal is found; bizarre ice formations in the Antarctic Ocean; a discovery off the east coast of Canada.

In the remote Cagayan Valley of the Philippines, archaeologists discover the remains of an ancient rhinoceros; a Brazilian island is infested with thousands of deadly vipers; researchers uncover shocking human remains deep in a Kenyan cave.

Exploring an ancient Egyptian cemetery filled with everyday people and find links to historic weaponry in a horseshoe-shaped French monument; puzzle over a lost South Asian society, then see if human remains found in Wales hint at coastal rituals.

A grim discovery in a Swedish lake reveals ancient practices; in the Canadian Arctic, the fossil of a previously unknown mammal is found; bizarre ice formations in the Antarctic Ocean; a discovery off the east coast of Canada.

In the remote Cagayan Valley of the Philippines, archaeologists discover the remains of an ancient rhinoceros; a Brazilian island is infested with thousands of deadly vipers; researchers uncover shocking human remains deep in a Kenyan cave.

Scan the skeleton of a drowned Stone Age fisherman in Chile and rediscover a vanished golden age in Egypt's lost city of Aten; ancient Chinese mummies reignite a cultural debate; discover a massive biblical-era moat in Jerusalem.

A golden-eyed priestess sparks myths of mystical powers and deep-rooted local folklore.

The fate of Pharaoh Ramses III has long been clouded by rumors of a family plot against him; scientists examine the tomb, uncovering evidence that supports these ancient suspicions.

Getting insight into the last moments of England's King Richard III; deciphering a manuscript hiding taboo 15th-century knowledge; spotting indications of human sacrifice in Scotland; inspecting silver coins tied to turbulent times in Eastern Europe.

Guest comedian Rachel Bloom.

Guest comic Mircea Monroe.

Contestants compete across the series, scoring points by answering questions correctly; they must avoid the impossible answers, otherwise they will be eliminated until the next day.

Caroline Aherne narrates as some of Britain's most opinionated viewers comment freely.

Wayne Brady, Ryan Stiles Colin Mochrie and guest performer Greg Proops are joined by star guest Kat Graham to put their comedic skills to the test through a series of spontaneous improv games.

A special episode featuring a compilation of games, moments, and outtakes of never-before-seen footage.

Contestants compete across the series, scoring points by answering questions correctly; they must avoid the impossible answers, otherwise they will be eliminated until the next day.

An extensive look into an active cold case investigation involving an unexplained crash in Roswell, N.M., in the summer of 1947; updated eyewitness accounts and expert interviews.

Jennifer Marshall and author MJ Banias head to West Virginia to investigate reports that the Mothman - a mysterious winged creature first spoken of in 1967 - may be back.

Podcast host Sam Tripoli joins Jennifer as she heads to Montauk, N.Y., to investigate stories that the U.S. government was conducting radical experiments on young children - including mind control tests and time travel.

A golden-eyed priestess sparks myths of mystical powers and deep-rooted local folklore.

The fate of Pharaoh Ramses III has long been clouded by rumors of a family plot against him; scientists examine the tomb, uncovering evidence that supports these ancient suspicions.

Getting insight into the last moments of England's King Richard III; deciphering a manuscript hiding taboo 15th-century knowledge; spotting indications of human sacrifice in Scotland; inspecting silver coins tied to turbulent times in Eastern Europe.

A grim discovery in a Swedish lake reveals ancient practices; in the Canadian Arctic, the fossil of a previously unknown mammal is found; bizarre ice formations in the Antarctic Ocean; a discovery off the east coast of Canada.

An extensive look into an active cold case investigation involving an unexplained crash in Roswell, N.M., in the summer of 1947; updated eyewitness accounts and expert interviews.

Jennifer Marshall and author MJ Banias head to West Virginia to investigate reports that the Mothman - a mysterious winged creature first spoken of in 1967 - may be back.

Podcast host Sam Tripoli joins Jennifer as she heads to Montauk, N.Y., to investigate stories that the U.S. government was conducting radical experiments on young children - including mind control tests and time travel.

A comedy quiz show full of quirky facts, in which contestants are rewarded more if their answers are "quite interesting.".

Sandi Toksvig hosts as "QI" goes voyaging with Nabil Abdulrashid, Joe Lycett, Lou Sanders and Alan Davies.

Caroline Aherne narrates as some of Britain's most opinionated viewers comment freely.

Two new fugitives, Sikh brothers Harinder and Davinder Singh, travel the UK together; they're aware of the "terrorist" stereotype of Asian men with beards and backpacks, so they mostly still within their community of extended family and friends.

A comedy quiz show full of quirky facts, in which contestants are rewarded more if their answers are "quite interesting.".

Sandi Toksvig hosts as "QI" goes voyaging with Nabil Abdulrashid, Joe Lycett, Lou Sanders and Alan Davies.

Caroline Aherne narrates as some of Britain's most opinionated viewers comment freely.

Two new fugitives, Sikh brothers Harinder and Davinder Singh, travel the UK together; they're aware of the "terrorist" stereotype of Asian men with beards and backpacks, so they mostly still within their community of extended family and friends.

An extensive look into an active cold case investigation involving an unexplained crash in Roswell, N.M., in the summer of 1947; updated eyewitness accounts and expert interviews.

Jennifer Marshall and author MJ Banias head to West Virginia to investigate reports that the Mothman - a mysterious winged creature first spoken of in 1967 - may be back.

Podcast host Sam Tripoli joins Jennifer as she heads to Montauk, N.Y., to investigate stories that the U.S. government was conducting radical experiments on young children - including mind control tests and time travel.

The science behind some of the most incredible engineering accidents ever filmed is revealed; a look at the physics involved as well as forensic details to explain the slip-ups that turned construction into destruction.

Caroline Aherne narrates as some of Britain's most opinionated viewers comment freely.

Chief Brett Lovegrove, former Head of Counter Terrorism for City of London Police, runs a team of 30 hunters, carefully selected from law enforcement, military intelligence and human tracking; their first fugitive is Dr. Ricky Allen from Kent.

Guest comic Gary Anthony Williams.

Guest comics Brad Sherwood and Jeff Davis.

Sandi Toksvig hosts as "QI" goes voyaging with Nabil Abdulrashid, Joe Lycett, Lou Sanders and Alan Davies.

A comedy quiz show full of quirky facts, in which contestants are rewarded more if their answers are "quite interesting.".

Uncover a vast underground city in Turkey that served as a refuge for Christians and Jews. Investigate a mysterious chalk chamber in England, visit a secret Etruscan complex beneath an Italian wine cellar, and map an ancient tunnel network in Iran.

Marvel at the crystal caves and underground chapels of Poland's Wieliczka salt mine. Tour a secret Cold War bunker in England, unearth a 3,400-year-old royal settlement in Egypt, and try to solve the mystery of China's enigmatic Longyou Caves.

A grim discovery in a Swedish lake reveals ancient practices; in the Canadian Arctic, the fossil of a previously unknown mammal is found; bizarre ice formations in the Antarctic Ocean; a discovery off the east coast of Canada.

Scattered around the world are long-forgotten engineering marvels, decaying cities and empty factories that once stood on the cutting edge of design and construction. Today they are discarded, dangerous, and some of them are even deadly. "Mysteries of the Abandoned" reveals why these engineering triumphs were built and how they were left to crumble. In each hourlong episode, stories tell of who originally designed the structure, its historical significance, and why it was ultimately no longer viable. California's Goat Canyon Trestle railway, Pennsylvania's Kinzua Viaduct steel bridge, the Grand Goulets Road in the French Alps, and Hashima Island, a once thriving and now deserted Japanese island, are among episode subjects.

Scattered around the world are long-forgotten engineering marvels, decaying cities and empty factories that once stood on the cutting edge of design and construction. Today they are discarded, dangerous, and some of them are even deadly. "Mysteries of the Abandoned" reveals why these engineering triumphs were built and how they were left to crumble. In each hourlong episode, stories tell of who originally designed the structure, its historical significance, and why it was ultimately no longer viable. California's Goat Canyon Trestle railway, Pennsylvania's Kinzua Viaduct steel bridge, the Grand Goulets Road in the French Alps, and Hashima Island, a once thriving and now deserted Japanese island, are among episode subjects.

Scattered around the world are long-forgotten engineering marvels, decaying cities and empty factories that once stood on the cutting edge of design and construction. Today they are discarded, dangerous, and some of them are even deadly. "Mysteries of the Abandoned" reveals why these engineering triumphs were built and how they were left to crumble. In each hourlong episode, stories tell of who originally designed the structure, its historical significance, and why it was ultimately no longer viable. California's Goat Canyon Trestle railway, Pennsylvania's Kinzua Viaduct steel bridge, the Grand Goulets Road in the French Alps, and Hashima Island, a once thriving and now deserted Japanese island, are among episode subjects.

Climbers make a shocking discovery when they encounter the remains of two human bodies high atop New Zealand's Mount Cook; after a forensic investigation, a decades-old mystery reignites that could rewrite mountaineering history.

A new theory about the sinking of the Titanic emerges; a treeless circle in the middle of the woods is probed; a formation of giant whale bones is discovered sticking out of the ground; researchers study the loudest sound ever recorded underwater.

Archaeologists discover an unusual man-made rock formation in the remote Altai Mountains of Russia, and conducting a further excavation, they unearth an ancient log cabin and the mummified remains of two bodies buried deep in the frozen permafrost.

A grim discovery in a Swedish lake reveals ancient practices; in the Canadian Arctic, the fossil of a previously unknown mammal is found; bizarre ice formations in the Antarctic Ocean; a discovery off the east coast of Canada.

Marvel at the crystal caves and underground chapels of Poland's Wieliczka salt mine. Tour a secret Cold War bunker in England, unearth a 3,400-year-old royal settlement in Egypt, and try to solve the mystery of China's enigmatic Longyou Caves.

The science behind some of the most incredible engineering accidents ever filmed is revealed; a look at the physics involved as well as forensic details to explain the slip-ups that turned construction into destruction.

Uncover discoveries that threaten to shatter our understanding of the past; each new discovery confronts our fascination and fear for what is hidden, illuminating the darkest recesses of history.

Three men vanish from a remote Scottish lighthouse; dozens of mines explode simultaneously during the Vietnam War, for no apparent reason; ten billion snow crabs disappear from the Bering Sea.

A grim discovery in a Swedish lake reveals ancient practices; in the Canadian Arctic, the fossil of a previously unknown mammal is found; bizarre ice formations in the Antarctic Ocean; a discovery off the east coast of Canada.

Marvel at the crystal caves and underground chapels of Poland's Wieliczka salt mine. Tour a secret Cold War bunker in England, unearth a 3,400-year-old royal settlement in Egypt, and try to solve the mystery of China's enigmatic Longyou Caves.

Learn who sailed on a sunken, treasure-filled pirate ship and who invoked the devil on a medieval curse tablet; Investigate 17 mini-coffins that have puzzled Scottish historians since 1836 and look inside a mysterious well of bones in Athens.

Archaeologists working at the Templo Mayor temple complex in Mexico, which was once located at the very centre of the Aztec Empire, unearth a chilling find, a tower made of over 600 human skulls.

Uncover discoveries that threaten to shatter our understanding of the past; each new discovery confronts our fascination and fear for what is hidden, illuminating the darkest recesses of history.

Caroline Aherne narrates as some of Britain's most opinionated viewers comment freely.

Two new fugitives, Sikh brothers Harinder and Davinder Singh, travel the UK together; they're aware of the "terrorist" stereotype of Asian men with beards and backpacks, so they mostly still within their community of extended family and friends.

Guest comic Jack Osbourne.

Guest comic Keegan-Michael Key.

Caroline Aherne narrates as some of Britain's most opinionated viewers comment freely.

The science behind some of the most incredible engineering accidents ever filmed is revealed; a look at the physics involved as well as forensic details to explain the slip-ups that turned construction into destruction.

Examine a tiny skeleton in Chile that set off a firestorm of alien speculation; explore a forgotten Silk Road settlement; uncover evidence of a mass sacrifice in northern Peru and visit a multi-faceted military site from the age of the pharaohs.

Exploring an ancient Egyptian cemetery filled with everyday people and find links to historic weaponry in a horseshoe-shaped French monument; puzzle over a lost South Asian society, then see if human remains found in Wales hint at coastal rituals.

In the remote Cagayan Valley of the Philippines, archaeologists discover the remains of an ancient rhinoceros; a Brazilian island is infested with thousands of deadly vipers; researchers uncover shocking human remains deep in a Kenyan cave.

On the island of Pohnpei in Micronesia, explorers discover ancient structures hidden beneath dense vegetation; a strange glowing forest is discovered in India; an immense tunnel system is investigated in the Brazilian jungle.

A grim discovery in a Swedish lake reveals ancient practices; in the Canadian Arctic, the fossil of a previously unknown mammal is found; bizarre ice formations in the Antarctic Ocean; a discovery off the east coast of Canada.

Climbers make a shocking discovery when they encounter the remains of two human bodies high atop New Zealand's Mount Cook; after a forensic investigation, a decades-old mystery reignites that could rewrite mountaineering history.

Learn who sailed on a sunken, treasure-filled pirate ship and who invoked the devil on a medieval curse tablet; Investigate 17 mini-coffins that have puzzled Scottish historians since 1836 and look inside a mysterious well of bones in Athens.

Archaeologists working at the Templo Mayor temple complex in Mexico, which was once located at the very centre of the Aztec Empire, unearth a chilling find, a tower made of over 600 human skulls.

Uncover a vast underground city in Turkey that served as a refuge for Christians and Jews. Investigate a mysterious chalk chamber in England, visit a secret Etruscan complex beneath an Italian wine cellar, and map an ancient tunnel network in Iran.