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

Size up answers with the contestants, who are sure they know what's right, what's wrong and what's impossible; battle through three mind-bending rounds of competition and see if someone cracks the 10,000-pound question.

Anthony Burke meets a former international model and his rock 'n' roll supergroup-connected partner as they try to turn a neglected country manor into a stylish home and function centre.

Size up answers with the contestants, who are sure they know what's right, what's wrong and what's impossible; battle through three mind-bending rounds of competition and see if someone cracks the 10,000-pound question.

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.

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.

Take a deep dive into watery enigmas; glide over a sunken Italian city; a unique underwater cemetery in the Florida Keys; a yellow brick road to nowhere in the depths of the North Pacific; puzzling rocky constructions off the coast of Australia.

Brenda and Peter have two young daughters and love their Minneapolis neighborhood, but they've outgrown their home, and they need Mike's expertise as they view the new houses they're considering, hoping to pick the best home for their family.

Six astronauts try to produce the most detailed 3-D images of Earth aboard the Space Shuttle Endeavour.

Night after night, Lyle Lovett and his 14 member band keep the show sizzling.

The top seven candidates prepare homegrown classics.

The bakers are challenged to re-create popular British desserts.

The remaining bakers celebrate the holiday season with three challenges.

In teams of three, the contestants develop drinks from gin, bourbon, and rum for a 1920s-themed challenge; guests at a cocktail party decide their fate.

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

Featuring Claudia Winkleman trading quips with Chris Pratt, Saoirse-Monica Jackson, Rob Beckett, Toby Jones and Rachel Chinouriri.

A compilation of highlights from the series, featuring a host of stars, including Demi Moore, Timothée Chalamet, Cher, Denzel Washington, Nicole Kidman and many more.

A special New Year's edition of the BAFTA-award-winning talk show; a hilarious host, sparkling celebrities, cracking conversation, eager audience, marvelous music and, of course, silly stories from the infamous Red Chair.

Size up answers with the contestants, who are sure they know what's right, what's wrong and what's impossible; battle through three mind-bending rounds of competition and see if someone cracks the 10,000-pound question.

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.

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 ship is found abandoned but undamaged in the middle of the ocean; a mysterious glowing orb chases locals down a railway track in Arkansas; Amelia Earhart vanishes on her pioneering round-the-world trip.

Delve into the chaos that avalanches, glaciers and endless snow and ice cause.

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

A ship is found abandoned but undamaged in the middle of the ocean; a mysterious glowing orb chases locals down a railway track in Arkansas; Amelia Earhart vanishes on her pioneering round-the-world trip.

Delve into the chaos that avalanches, glaciers and endless snow and ice cause.

Featuring Claudia Winkleman trading quips with Chris Pratt, Saoirse-Monica Jackson, Rob Beckett, Toby Jones and Rachel Chinouriri.

A compilation of highlights from the series, featuring a host of stars, including Demi Moore, Timothée Chalamet, Cher, Denzel Washington, Nicole Kidman and many more.

A special New Year's edition of the BAFTA-award-winning talk show; a hilarious host, sparkling celebrities, cracking conversation, eager audience, marvelous music and, of course, silly stories from the infamous Red Chair.

Examine strange relics forgotten by time; visit a perturbing circle of stone in the Golan Heights; a mountain of headless statues in Turkey; a castle left to crumble in the Saudi Arabian desert; a time-worn secret in the wilds of Peru.

Confront objects that make no sense; spot a spinning island in an Argentinian marsh, a colossal triangle stuck in the Arizona desert, mysterious multicoloured pools across northern Ethiopia and a huge human figure hidden in the Australian outback.

Keith and Michelle have a limited budget.

After moving from Austria to the U.S., a father, mother and daughter search for a home with a classic California beach view.

An inside look at the Kellog's NASCAR racing team, with pro driver Kyle Bush.

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

The remaining four bakers face three challenges during French Patisserie Week.

The top three bakers go for broke in an exciting, intense finale; looking at elegant mini mousse cakes, exquisite pear charlottes, and multi-tiered wedding cakes before one big winner is named Canada's top baker.

Paid programming.

Sisters Michelle and Sonia run Miracles Outreach to house girls who have aged out of the foster program, and they need a new house and Mike's help; Mike assesses their prospective houses to help them find a home that is worth their investment.

Eight mixologists create cocktails inspired by delicious desserts; Gonzo Jimenez adds his expertise.

Size up answers with the contestants, who are sure they know what's right, what's wrong and what's impossible; battle through three mind-bending rounds of competition and see if someone cracks the 10,000-pound question.

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.

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 thrilling battle of brainpower as four contestants pit their wits against The Chaser.

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

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

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

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

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.

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

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

Special guests Penn & Teller.

Guest comic Jack Osbourne.

Guest comic Keegan-Michael Key.

Guest comedian Rachel Bloom.

A thrilling battle of brainpower as four contestants pit their wits against The Chaser.

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

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

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.

A three-part challenge puts the competitors' technical abilities, speed, and precision to the test.

In teams of two, the contestants must mix and pair the perfect cocktail with a culinary dish assigned by renowned chef Edward Lee.

The competition heats up as the mixologists craft cocktails with a spicy kick; award-winning bartender Tiffanie Barriere guest judges.

Determined to compete in the finale, the four remaining contestants prepare a flight of cocktails using the judges' favorite spirits.

Three bartenders face off in the finale.

Learning why an important urban center is sinking toward oblivion; soaring over sprawling ruins buried under Saharan sands; learning the modern secret of an ancient fortress; eyeing a ghost town on the edge of the Gobi.

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.

Featuring Claudia Winkleman trading quips with Chris Pratt, Saoirse-Monica Jackson, Rob Beckett, Toby Jones and Rachel Chinouriri.

A compilation of highlights from the series, featuring a host of stars, including Demi Moore, Timothée Chalamet, Cher, Denzel Washington, Nicole Kidman and many more.

A special New Year's edition of the BAFTA-award-winning talk show; a hilarious host, sparkling celebrities, cracking conversation, eager audience, marvelous music and, of course, silly stories from the infamous Red Chair.

Special guests Penn & Teller.

Guest comic Jack Osbourne.

Guest comic Keegan-Michael Key.

Guest comedian Rachel Bloom.

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

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

Graham's guests are Hollywood stars Sigourney Weaver and Nicholas Hoult, celebrity chef Jamie Oliver, actor Lolly Adefope and supergroup Coldplay, who chat and perform their current single, "All My Love.".

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

Stephen Fry mixes and matches a medley of M-subjects with guests Jo Brand and James Acaster.

Stephen Fry corrects some misconceptions with Sue Perkins, Sara Cox, Chris Addison, and Alan Davies.

Graham's guests are Hollywood stars Sigourney Weaver and Nicholas Hoult, celebrity chef Jamie Oliver, actor Lolly Adefope and supergroup Coldplay, who chat and perform their current single, "All My Love.".

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

Stephen Fry mixes and matches a medley of M-subjects with guests Jo Brand and James Acaster.

Stephen Fry corrects some misconceptions with Sue Perkins, Sara Cox, Chris Addison, and Alan Davies.

Size up answers with the contestants, who are sure they know what's right, what's wrong and what's impossible; battle through three mind-bending rounds of competition and see if someone cracks the 10,000-pound question.

Demi Moore starring in the critically acclaimed body-horror "The Substance"; music superstar and actor Lady Gaga; Colin Farrell taking the title role in "The Penguin"; Richard Ayoade talking about his new book "The Unfinished Harauld Hughes.".

Interviewing Hugh Grant, Sebastian Stan, Greg Davies and Neneh Cherry; performance from Perie.

BAFTA Award-winning comedian Graham Norton hosts this long-running, eponymous talk show on which he discusses the people, trends and news stories that interest him the most. As you'd expect from a comedic talk show, Norton performs a monologue and other comedy sketches, which include eccentric stories and characters, while welcoming celebrity guests and musical performers. The hourlong program often includes madcap audience participation. The party happens in Graham's world - and you're invited.

Ten bakers arrive in the white baking tent to face the first challenge.

The bakers take on three challenges for bread week.

The remaining eight bakers face a series of sweet challenges during dessert week.

The top seven candidates prepare homegrown classics.

The bakers are challenged to re-create popular British desserts.

The remaining bakers celebrate the holiday season with three challenges.

The remaining four bakers face three challenges during French Patisserie Week.

The top three bakers go for broke in an exciting, intense finale; looking at elegant mini mousse cakes, exquisite pear charlottes, and multi-tiered wedding cakes before one big winner is named Canada's top baker.

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

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

Size up answers with the contestants, who are sure they know what's right, what's wrong and what's impossible; battle through three mind-bending rounds of competition and see if someone cracks the 10,000-pound question.

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.

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.

Size up answers with the contestants, who are sure they know what's right, what's wrong and what's impossible; battle through three mind-bending rounds of competition and see if someone cracks the 10,000-pound question.

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

Delve into the chaos that avalanches, glaciers and endless snow and ice cause.

A ship is found abandoned but undamaged in the middle of the ocean; a mysterious glowing orb chases locals down a railway track in Arkansas; Amelia Earhart vanishes on her pioneering round-the-world trip.

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

Anthony Burke meets a former international model and his rock 'n' roll supergroup-connected partner as they try to turn a neglected country manor into a stylish home and function centre.

Strange markings in the remote reaches of Northern Finland; drones find a Manhattan-sized mystery in the depths of a Vietnamese cave; secrets are no longer hidden in the Antarctic; a lost sky-high world in Mozambique gets a visit from above.

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

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

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

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

Contractor Mike Holmes joins forces with his children, Michael and Sherry, to continue his legacy of making it right and helping homeowners in need.

The Holmes team surprises superfan Michael, who has autism, with news that he's part of the crew; his family gets a life-changing upgrade that will open up their tired bungalow and give them more room for living.

Dealing with toxic fallout after a hot real estate market forces Jason and Alisha to buy a house without getting a home inspection; the Holmes team transforms a moldy, radon-filled eyesore into a cozy, healthy place to raise a family.

Deal with heartbreaking cases, including a bald eagle that has mysteriously lost its ability to fly. Watch over a chilled fawn that won't eat, a hummingbird with dangerously sticky wings, and a snapping turtle that got caught in a city reservoir.

Cope with injuries caused by human neglect and malice, including a gull that ate a metal shard and animals shot by pellet guns. Celebrate the recovery of two foxes with avian flu and witness the joyous release of 12 robins and a snapping turtle.

Take a deep dive into watery enigmas; glide over a sunken Italian city; a unique underwater cemetery in the Florida Keys; a yellow brick road to nowhere in the depths of the North Pacific; puzzling rocky constructions off the coast of Australia.

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

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

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

Demi Moore starring in the critically acclaimed body-horror "The Substance"; music superstar and actor Lady Gaga; Colin Farrell taking the title role in "The Penguin"; Richard Ayoade talking about his new book "The Unfinished Harauld Hughes.".

Interviewing Hugh Grant, Sebastian Stan, Greg Davies and Neneh Cherry; performance from Perie.

A thrilling battle of brainpower as four contestants pit their wits against The Chaser.

Special guests Penn & Teller.

Guest comic Jack Osbourne.

Guest comic Keegan-Michael Key.

Guest comedian Rachel Bloom.

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

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

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

Sign off.

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

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

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

Size up answers with the contestants, who are sure they know what's right, what's wrong and what's impossible; battle through three mind-bending rounds of competition and see if someone cracks the 10,000-pound question.

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.

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.

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

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.

In the Australian rain forests of Lake Eacham, a scientist discovers a mysterious mouse-like creature that glows in the dark; strange cylindrical tubes are uncovered in the forests of India; hundreds of human bones are found in a Belizean cave.

A silent, orange football-shaped object is spotted over Loring Air Force Base in Maine; a Swedish farmer witnesses a crash into a lake.

Paid programming.

On the volcanic island of Kolombagara, explorers uncover a mysterious man-made cave in the dense jungle; a researcher finds two unknown animal skulls in Vietnam; human remains are discovered in a narrow chamber of a South African cave system.

Stories of ghost towns, including Pripyat and Hashima Island.

The U.S. gains information about space borders using unwanted battleship guns; a V2 rocket is developed from the remains of a secret Nazi base.

The history of a stretch of concrete known as Hitler's Bridge; the highest bridge in the world collapses.

Once-great triumphs of marine engineering now left to rust include a ship graveyard in Maryland.

A look at disused structures that used to be at the forefront of the world's power supply, including Budapest's Kelenfold Power Station and New York's Wardenclyffe Tower.

A crumbling hill in the Peak District and dunes in California causes the closure of two roads; a route used by the French Resistance is closed in 2003.

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.

Unveil the legacy of a prehistoric Peruvian hunter and dig up what may be the ruins of a fabled Roman seaside city in Tunisia. Listen to a haunting sand-dune symphony in Mongolia, then catalogue a trove of human and animal bones in Saudi Arabia.

Exploring the stories behind mankind's greatest engineering disasters through archives and expert interviews.

In the Arctic Circle eerie multi-colored lights move across the night sky, highway streetlights inexplicably start swaying wildly, threatening motorists and a perfectly circular beach and ocean appear in dense forest.

On the flanks of a volcano, lava appears that astonishingly burns bright blue; a creepy orange entity pulses threateningly at the bottom of a partially frozen pond; a huge, sinister dark blob invades a popular beach.

A bright blue object streaks across the night sky, evoking a terrifying legend; a mountain defies belief as it collapses like a deck of cards; a pristine lake gets coated in a strange layer of grey gunk.

Exploring the stories behind mankind's greatest engineering disasters through archives and expert interviews.

Inspect the wreck of the Mary Celestia, a Civil War ship raised by a hurricane; encounter imperial relics exposed by a drought in Iraq, the storm-tossed remains of a medieval man and long-lost wooden artifacts that reshape Native American history.

Look over Seahenge, a Bronze Age timber circle exposed by England's rising seas; assess an ancient Ukrainian canoe lifted by flood waters, human remains trapped in a Chinese mudslide and a forgotten relic on the dried-out bottom of Lake Mead.

Encounter kids' drawings on the walls in Pompeii that expose the city's violent gladiatorial past; check out a mythical sculpture unearthed by an Indian tsunami, a 12-century temple in quake-prone Mexico; a sunken ship in Utah's Great Salt Lake.

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.

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.

Touring a Miami suburb that began as a dream and became a nightmare; visiting a glitzy Beirut high-rise consumed by hate and fear; learning why armed raiders targeted an English pirate vessel.

An eerie set of buildings in Paris is evidence of an unspeakable evil; new discoveries reveal the horrific things that happened here, and why they were abandoned.

Seeing the home of a hush-hush Alabama fraternal organization that changed America and a testament to Allied heroism in North America; looking around a once lavish Beirut complex scarred by tragedy; visiting an elite leadership centre in Greece.

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 perfectly 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.

Encounter kids' drawings on the walls in Pompeii that expose the city's violent gladiatorial past; check out a mythical sculpture unearthed by an Indian tsunami, a 12-century temple in quake-prone Mexico; a sunken ship in Utah's Great Salt Lake.

Examine how seismic activity exposed WW II vessels near Iwo Jima; unravel clues to Maya political intrigue in Guatemala; see why footprints found post-storm are changing English migration history; visit a Neolithic wall on an eroding Scottish coast.

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.

Tornadoes are among the most powerful and destructive natural hazards in the world, with the U.S. experiencing the most globally; experts explain their formation, while residents of Kentucky and Missouri share harrowing survival stories.

Two of the deadliest tsunamis ever recorded are the 2004 Indian Ocean Tsunami and the 2011 Tohoku Tsunami in Japan; survivors recount traumatic experiences as scientists shed light on the causes and warning signs of tsunamis.

Wildfires are becoming megafires, devastating populated areas and causing tragic loss of life, as seen with the Yarnell Hill Fire and the Maui Fire in Lahaina, Hawaii; experts investigate the science and causes behind this phenomenon.

Anthony Burke meets a Sydney couple who impulse-buy an old, dilapidated school in South Australia, sight unseen, and turn their hands to restoring it.

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.

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.

Anthony Burke meets a Sydney couple who impulse-buy an old, dilapidated school in South Australia, sight unseen, and turn their hands to restoring it.

Accidents plague the aviation industry and frighten the public.

A daredevil aviator vanishes into thin air on a routine flight; A mystery blast rocks a remote island; Napoleon Bonaparte suffers a shock defeat.

A young boy is swallowed by a sand dune and miraculously survives; A fog lasts five days and kills thousands in London; The largest ship in the US Navy vanishes during World War I.

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.

Accidents plague the aviation industry and frighten the public.

Unraveling the intricate details of high-profile accidents, from structural collapses to technological failures using cutting-edge 3D animation and CGI to get inside the disaster and identify what went wrong, how and when..

Unraveling the intricate details of high-profile accidents, from structural collapses to technological failures using cutting-edge 3D animation and CGI to get inside the disaster and identify what went wrong, how and when..

Volcanoes erupt globally every day, with immense destructive potential; detailed footage and survival tales provide insight into their monstrous power, from Mount St. Helens in 1980 to the 2018 eruption of Volcan de Fuego.

Experts explore formation, increasing frequency, heightened power, and the science behind surviving hurricanes.

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.

Looking at the Oklahoma hotel built with stolen oil money; reflecting on brutality in a Cambodian school turned chamber of horrors; spotting a Latvian telescope that spied on the West; celebrating an Italian tribute to air travel.

A complex built to entomb British spies and a once ingenious military facility; the imprint of ancient culture around a deserted Italian town; the shell of a highly classified Soviet weapons factory hidden in an Estonian forest.

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.

Archaeologists make a grim discovery when they uncover the remains of a mummified boy buried in the frozen Siberian landscape, and as researchers continue their excavation, they uncover 88 additional graves linked to a mysterious, ancient necropolis.

An unidentified metal object is found on Kiska Island; a centuries-old gold mining mystery is investigated; in Siberia, a network of ice tunnels is explored; fossils unearthed in the Canadian Arctic lead to the discovery of a new species.

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

Zoom in on some otherworldly sights; spot a giant glacier on the Red Planet, let the milky seas off the coast of Java bathe your vision, ponder a huge hexagon floating above Saturn and take a spin around a doughnut-shaped lake in Saskatchewan.

Explores strongholds abandoned by their architects; a lost city in the Amazon jungle; a desert fortress made by humanity's most notorious empire; explores a city of identical castles; examines a Greek isle's bloody history from the air.

A ship is found abandoned but undamaged in the middle of the ocean; a mysterious glowing orb chases locals down a railway track in Arkansas; aviator Amelia Earhart vanishes on her pioneering round-the-world trip.

Learning why an important urban center is sinking toward oblivion; soaring over sprawling ruins buried under Saharan sands; learning the modern secret of an ancient fortress; eyeing a ghost town on the edge of the Gobi.

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.

A ship is found abandoned but undamaged in the middle of the ocean; a mysterious glowing orb chases locals down a railway track in Arkansas; aviator Amelia Earhart vanishes on her pioneering round-the-world trip.

Dig into artifacts from a multicultural Jamaican port sunk by a devastating earthquake; get insights into everyday Meso-American life next to a Salvadoran volcano; peek at a Minoan landmark; inspect a treasure trove of English relics.

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.

Looking at the Oklahoma hotel built with stolen oil money; reflecting on brutality in a Cambodian school turned chamber of horrors; spotting a Latvian telescope that spied on the West; celebrating an Italian tribute to air travel.

A complex built to entomb British spies and a once ingenious military facility; the imprint of ancient culture around a deserted Italian town; the shell of a highly classified Soviet weapons factory hidden in an Estonian forest.

Explores strongholds abandoned by their architects; a lost city in the Amazon jungle; a desert fortress made by humanity's most notorious empire; explores a city of identical castles; examines a Greek isle's bloody history from the air.

Peek at landmarks in places where they shouldn't be; wing your way over an imperial pyramid in the Netherlands, a metal sphere in remote Russia, a lion shape carved into an English hillside and a bare swath cut through an Austrian forest.

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.

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.

Puzzle over an out-of-place relic from World War II and get a bird's-eye view of stone circles in Norway; examine mysterious, ancient mounds on the banks of the Mississippi and uncover the dark history of a medieval English village.

Paid programming.

A 10,000-gallon water tank is found to be empty after an object is spotted hovering over it; amaranth plants wilt after a saucer-shaped craft hovers above them.

The view from above reveals; a derelict complex of pod-like structures with seemingly alien origins; a bewildering concrete construction in the mountains of Bosnia; a puzzling collection of out of place shapes discarded in the wilds of Greenland.

Exploring video evidence and testimony of the existence and nature of UFOs.

Digging into a UFO crash caught on camera in Brazil; a close encounter of the Beatles kind; finding out if aliens shut down a nuclear missile launch site in Montana; looking at the shapes of UFOs and considering a link between ghosts and aliens.

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.

Investigate a Michigan air base where a UFO cover-up allegedly took place; wander through a wonderland built by a shady entrepreneur; explore a California civil rights mecca and a Croatian cliffside citadel that influenced the fate of a nation.

Explore evidence that ties a meteor strike to a Biblical tale. Delve into a treasure-filled tunnel revealed by a sinkhole in Mexico, a medieval cave shrine exposed during a UK landslide, and famine warnings brought to light by a severe drought.

Encounter kids' drawings on the walls in Pompeii that expose the city's violent gladiatorial past; check out a mythical sculpture unearthed by an Indian tsunami, a 12-century temple in quake-prone Mexico; a sunken ship in Utah's Great Salt Lake.

Examine how seismic activity exposed WW II vessels near Iwo Jima; unravel clues to Maya political intrigue in Guatemala; see why footprints found post-storm are changing English migration history; visit a Neolithic wall on an eroding Scottish coast.

Discover 10 perfectly 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.

When strange towers of ice are found growing in a barren, water-starved desert, experts speculate why these structures have uncanny similarities to extraterrestrial formations recently discovered on Pluto's alien landscape.

Volcanoes erupt globally every day, with immense destructive potential; detailed footage and survival tales provide insight into their monstrous power, from Mount St. Helens in 1980 to the 2018 eruption of Volcan de Fuego.

Experts explore formation, increasing frequency, heightened power, and the science behind surviving hurricanes.

A young boy is swallowed by a sand dune and miraculously survives; A fog lasts five days and kills thousands in London; The largest ship in the US Navy vanishes during World War I.

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 ship is found abandoned but undamaged in the middle of the ocean; a mysterious glowing orb chases locals down a railway track in Arkansas; Amelia Earhart vanishes on her pioneering round-the-world trip.

Threatening blue lights bombard a famous resort town, evoking the apocalypse, a nuclear meltdown could be behind an ominous blazing beam of light and supersized, underground crystals appear out of this world.

Huge sand dunes bellow sinister sounds as loud as a jackhammer; a churning mud pot mysteriously goes on a rampage, destroying infrastructure; and a river, linked to a national tragedy, mysteriously vanishes.

Inspect the wreck of the Mary Celestia, a Civil War ship raised by a hurricane; encounter imperial relics exposed by a drought in Iraq, the storm-tossed remains of a medieval man and long-lost wooden artifacts that reshape Native American history.

Look over Seahenge, a Bronze Age timber circle exposed by England's rising seas; assess an ancient Ukrainian canoe lifted by flood waters, human remains trapped in a Chinese mudslide and a forgotten relic on the dried-out bottom of Lake Mead.

Encounter kids' drawings on the walls in Pompeii that expose the city's violent gladiatorial past; check out a mythical sculpture unearthed by an Indian tsunami, a 12-century temple in quake-prone Mexico; a sunken ship in Utah's Great Salt Lake.

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.

Archaeologists make a grim discovery when they uncover the remains of a mummified boy buried in the frozen Siberian landscape, and as researchers continue their excavation, they uncover 88 additional graves linked to a mysterious, ancient necropolis.

Exploring the drug-war front lines in Panama and an Alpine utopia with a dark past; visiting Poland for a peek inside a revolutionary prison; getting close to a Tunisian monument.

Meeting the people who designed amazing engineering projects and those that help revive them.

Inspect a decaying New Jersey facility that was a powder keg of injustice, then tour a Polish imperial bastion turned movie set. Visit an English country retreat that harboured radical fugitives and a Namibian outpost funded by desert treasures.

Encounter kids' drawings on the walls in Pompeii that expose the city's violent gladiatorial past; check out a mythical sculpture unearthed by an Indian tsunami, a 12-century temple in quake-prone Mexico; a sunken ship in Utah's Great Salt Lake.

A giant ice stack on a remote lake spouts a strange vapor, dazzling jeweled objects litter a dank cave floor and a man's shout causes a lake to bizarrely react with thousands of ripples.

Threatening blue lights bombard a famous resort town, evoking the apocalypse, a nuclear meltdown could be behind an ominous blazing beam of light and supersized, underground crystals appear out of this world.