Track a storm-ignited Colorado wildfire, a toxic New Zealand volcanic eruption, and an apocalyptic Appalachian flood from above. Discover how a distant earthquake and poor construction caused a towering Bangkok skyscraper to collapse in seconds.

Tiptoe across an ancient burial ground in Panama and discover an Aboriginal time capsule after a bushfire rips across Australia. Address urgent questions about disease and mass burials in Nova Scotia, then find buried treasure in an Iraqi holy site.

Experts examine how the Chernobyl nuclear disaster and the Bhopal gas tragedy happened; they also explore the consequences and how they could have been avoided.

Hawaii's Kilauea volcano violently erupts; Good Samaritans in Texas rescue care home residents trapped in Hurricane Harvey's deadly floodwaters; in England a paddleboarder battles high winds and treacherous tides.

A Swiss mountain seems to be squirting out its insides; a moon with a halo appears and seems to trigger bizarre human behavior; glowing green geese are filmed flying over Canada.

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.

On a September morning in 1994, students at a Zimbabwe school witness a silver craft land in a nearby field; numerous adults corroborate the UFO sighting, but the children are silenced; many maintain their account of the incident is true.

Squaring off on national parks, Downton Abbey, musical theatre and human anatomy.

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

Drones reveal what's left of Henry Ford's American suburb in the Brazilian jungle; looking for clues to what killed a once-vibrant Pennsylvania mining town; an aerial glimpse of New York's forgotten ghost town; an Italian Renaissance reduced to dust.

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.

As seen from space, a crater in Turkmenistan, is on fire; drones reveal perfect circles in the Namibian desert; A puzzle is solved by a World War 2 code breaker; Mystery of Death Valley's self-moving stones; Utah's strange electric blue ponds.

Budding entrepreneurs get three minutes to pitch their business ideas to five multimillionaires who are willing to invest their own cash to kick-start the businesses in the original "Shark Tank." After each pitch, the Dragons have the opportunity to ask questions about the venture. The entrepreneurs don't always have to answer, but of course what they choose not to address could very well affect the outcome. The pitch is over when each of the Dragons has declared,"I'm out." Evan Davis hosts.

Squaring off on national parks, Downton Abbey, musical theatre and human anatomy.

Drones reveal what's left of Henry Ford's American suburb in the Brazilian jungle; looking for clues to what killed a once-vibrant Pennsylvania mining town; an aerial glimpse of New York's forgotten ghost town; an Italian Renaissance reduced to dust.

A Revolutionary leader visits Alabama's first capital and leaves it bankrupt; an Oregon fort refuses to engage an enemy submarine during World War II; a film studio in Jacksonville, Fla. caters to a new audience.

In the Philippines, the Taal volcano violently erupts; a snowboarder in Utah rescues himself from a snowy mountain; in the Grand Canyon, mud and rocks barrel down on a group of tourists.

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.

The Virgin Mary appears in a dust cloud as a landslide narrowly misses her church; a second sun suddenly appears over a city; a farmer's footage might solve the riddle of mysterious crop circles.

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.

Sandi Toksvig delves into the public and the private with Alan Davies, Victoria Coren Mitchell, Phill Jupitus and Bridget Christie.

Sandi Toksvig looks at pictures with Alan Davies, Hannah Gadsby, Noel Fielding and Joe Lycett.

As the four-month assessment approaches, the handlers test different ways of connecting with their pups; one naughty kelpie gets a devilish new name.

A guinea pig named JT has a life-threatening tooth issue, a duck named Dick has a septic joint that needs cleaning, and Savannah and Dayle head to La Ronge, SK. to speak to a class of high schoolers and mentor the next generation of veterinarians.

Patching up a snake-bitten kitty cat and a bearded dragon with an odd leg swelling.

Sandi Toksvig delves into the public and the private with Alan Davies, Victoria Coren Mitchell, Phill Jupitus and Bridget Christie.

Sandi Toksvig looks at pictures with Alan Davies, Hannah Gadsby, Noel Fielding and Joe Lycett.

As the four-month assessment approaches, the handlers test different ways of connecting with their pups; one naughty kelpie gets a devilish new name.

A guinea pig named JT has a life-threatening tooth issue, a duck named Dick has a septic joint that needs cleaning, and Savannah and Dayle head to La Ronge, SK. to speak to a class of high schoolers and mentor the next generation of veterinarians.

Patching up a snake-bitten kitty cat and a bearded dragon with an odd leg swelling.

In the Philippines, the Taal volcano violently erupts; a snowboarder in Utah rescues himself from a snowy mountain; in the Grand Canyon, mud and rocks barrel down on a group of tourists.

The Virgin Mary appears in a dust cloud as a landslide narrowly misses her church; a second sun suddenly appears over a city; a farmer's footage might solve the riddle of mysterious crop circles.

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.

As seen from space, a crater in Turkmenistan, is on fire; drones reveal perfect circles in the Namibian desert; A puzzle is solved by a World War 2 code breaker; Mystery of Death Valley's self-moving stones; Utah's strange electric blue ponds.

Hitting a pop-music high note, looking at ancient Rome and facing TV trivia heartbreak.

Contemplate the strange disappearance and reappearance of the master of macabre, Edgar Allan Poe, just before his death in 1849; explore the chilling rumor that Shakespeare's grave was robbed, then chase down thieves who stole the Mona Lisa in 1911.

A remote island linked to one of the world's most famous aviation mysteries; thousands of shipwrecks in the Bermuda triangle; a history lost and found in the South Pacific; a 10,000-year-old mystery in the murky depths of the Yucatán Peninsula.

Off the coast of Tanzania, a puzzling site containing massive stone blocks is revealed on Kilwa Island; the discovery of giant animal bones baffles researchers in Australia; hundreds of human bones are uncovered in a Guatemalan rain forest.

On a September morning in 1994, students at a Zimbabwe school witness a silver craft land in a nearby field; numerous adults corroborate the UFO sighting, but the children are silenced; many maintain their account of the incident is true.

Budding entrepreneurs get three minutes to pitch their business ideas to five multimillionaires who are willing to invest their own cash to kick-start the businesses in the original "Shark Tank." After each pitch, the Dragons have the opportunity to ask questions about the venture. The entrepreneurs don't always have to answer, but of course what they choose not to address could very well affect the outcome. The pitch is over when each of the Dragons has declared,"I'm out." Evan Davis hosts.

Hitting a pop-music high note, looking at ancient Rome and facing TV trivia heartbreak.

A remote island linked to one of the world's most famous aviation mysteries; thousands of shipwrecks in the Bermuda triangle; a history lost and found in the South Pacific; a 10,000-year-old mystery in the murky depths of the Yucatán Peninsula.

Navigating an Arizona border town where soldiers fought between two worlds; seeing a revolutionary mountain hideaway in New York; touring an American icon's dilapidated birthplace; viewing an Alaskan monument to natural-resource exploitation.

A violent tornado outbreak unleashes carnage on Oklahoma, Texas and Louisiana; A Swedish snow mobile rider gets lost in the mountains during a nighttime adventure; A record-breaking super typhoon brings down the roof on a wedding in the Philippines.

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.

Off the coast of Tanzania, a puzzling site containing massive stone blocks is revealed on Kilwa Island; the discovery of giant animal bones baffles researchers in Australia; hundreds of human bones are uncovered in a Guatemalan rain forest.

A passenger on a helicopter films a weird red liquid seeping from an Antarctic glacier. A ship appears in the sky at the site of a notorious World War Two naval battle. And strange lights filmed dividing over an American city.

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 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.

Old Tombs, buried coins, and a 4,000-year-old oak log coffin are discovered.

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.

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.

Old Tombs, buried coins, and a 4,000-year-old oak log coffin are discovered.

Fails include an overpass fire, a downed radio telescope and a sinking airport.

A violent tornado outbreak unleashes carnage on Oklahoma, Texas and Louisiana; A Swedish snow mobile rider gets lost in the mountains during a nighttime adventure; A record-breaking super typhoon brings down the roof on a wedding in the Philippines.

A passenger on a helicopter films a weird red liquid seeping from an Antarctic glacier. A ship appears in the sky at the site of a notorious World War Two naval battle. And strange lights filmed dividing over an American city.

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 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.

Checking in with a ready-for-anything trio, then diving into stellar astronomical constellation facts; celebrating a lucky guess about Mediterranean islands, rolling the dice on Trivial Pursuit, and seeing a head-scratcher land a winner in hot water.

Exhume chilling insights into ancient rituals, legendary warriors, and brutal deaths; investigate dozens of children's skeletons in Peru, find out if Amazon warriors once lived in Russia, and see what a UK cave full of butchered remains reveals.

When seen from above, the pyramids of Giza align with the stars; survivors of Katrina find rescue when least expected; a volcano burns bright blue; a forgotten beach reveals its secrets.

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.

New York City is under attack as Hurricanes Ida and Ian unleash their fury on innocent people; seeing how the latest science and technology can protect New York City's 8 million residents before everything gets swept away by ferocious superstorms.

Budding entrepreneurs get three minutes to pitch their business ideas to five multimillionaires who are willing to invest their own cash to kick-start the businesses in the original "Shark Tank." After each pitch, the Dragons have the opportunity to ask questions about the venture. The entrepreneurs don't always have to answer, but of course what they choose not to address could very well affect the outcome. The pitch is over when each of the Dragons has declared,"I'm out." Evan Davis hosts.

Checking in with a ready-for-anything trio, then diving into stellar astronomical constellation facts; celebrating a lucky guess about Mediterranean islands, rolling the dice on Trivial Pursuit, and seeing a head-scratcher land a winner in hot water.

When seen from above, the pyramids of Giza align with the stars; survivors of Katrina find rescue when least expected; a volcano burns bright blue; a forgotten beach reveals its secrets.

A strange structure in New York becomes a testing ground for Nazi technology; a thriving amusement park is laid to ruins by an unstoppable force of nature; an island becomes a major player in a controversial industry.

Blazing bushfires tear through communities as a good Samaritan saves panicked drivers; a skier captures the horrifying moment he is buried alive by a tsunami of snow; a man flees just before a landslide sweeps eight homes into the sea.

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.

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.

Strange cloud rings filmed in the sky over Siberia may be linked to unexplained circles on the ice of a nearby lake; a lighthouse wobbles as it's battered by a storm; spiders travel hundreds of miles through the air.

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.

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.

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

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

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.

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

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.

Blazing bushfires tear through communities as a good Samaritan saves panicked drivers; a skier captures the horrifying moment he is buried alive by a tsunami of snow; a man flees just before a landslide sweeps eight homes into the sea.

Strange cloud rings filmed in the sky over Siberia may be linked to unexplained circles on the ice of a nearby lake; a lighthouse wobbles as it's battered by a storm; spiders travel hundreds of miles through the air.

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.

The Red Pyramid at Dahshur is a revolutionary megastructure and the first true pyramid ever constructed in Ancient Egypt; experts investigate to reveal the pharaoh who built it and the mystery behind its trailblazing design.

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.

As the four-month assessment approaches, the handlers test different ways of connecting with their pups; one naughty kelpie gets a devilish new name.

Strange aquatic mammals populating a river in Columbia; a ship marooned in a sea of sand along Namibia's notorious Skeleton Coast; a Boeing 727 jetliner hidden in a pine forest; an unusual pattern is discovered in the Nevada desert.

In the jungles of southern Mexico, a rancher discovers dozens of skulls and bones on a cave floor; strange grass-covered domes are investigated in the Philippines; archaeologists uncover carved stone figures on the Hawaiian island of Kauai.

Experts examine how the Chernobyl nuclear disaster and the Bhopal gas tragedy happened; they also explore the consequences and how they could have been avoided.

Budding entrepreneurs get three minutes to pitch their business ideas to five multimillionaires who are willing to invest their own cash to kick-start the businesses in the original "Shark Tank." After each pitch, the Dragons have the opportunity to ask questions about the venture. The entrepreneurs don't always have to answer, but of course what they choose not to address could very well affect the outcome. The pitch is over when each of the Dragons has declared,"I'm out." Evan Davis hosts.

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.

Strange aquatic mammals populating a river in Columbia; a ship marooned in a sea of sand along Namibia's notorious Skeleton Coast; a Boeing 727 jetliner hidden in a pine forest; an unusual pattern is discovered in the Nevada desert.

Look at a secret desert outpost in Utah where men unleashed hell; entering a forgotten Jacksonville church that became a haven; explore third-hand Japanese buildings in New York and the lair of a birdlike beast that tormented a West Virginia town.

Witnessing Hurricane Ida's devastation as it reduces Louisiana to rubble; following a man running for his life from California wildfires; facing a deadly sea swirl with a Norwegian ship crew; looking for a snow kiter engulfed by an avalanche.

The view from above reveals; baffling behavior from one of the ocean's fastest fish; whales with a strange, aquatic accessorizing habit; a confounding congregation of sharks down under; and a perplexing collection of circles decorating the seabed.

In the jungles of southern Mexico, a rancher discovers dozens of skulls and bones on a cave floor; strange grass-covered domes are investigated in the Philippines; archaeologists uncover carved stone figures on the Hawaiian island of Kauai.

A cigar-shaped hole in the clouds in Michigan; how to explain ghostly ice apples that appear on a tree after a ferocious winter storm; a strange jelly that falls from the sky into a garden in West Virginia.

The view from above reveals; baffling behavior from one of the ocean's fastest fish; whales with a strange, aquatic accessorizing habit; a confounding congregation of sharks down under; and a perplexing collection of circles decorating the seabed.

Timothée Chalamet, Emma Thompson, Rowan Atkinson, JADE.

A massive typhoon in the Philippines; a record-breaking California wildfire; a submerged house; a lost snowboarder spends an icy night facing bears and deadly frostbite.

Timothée Chalamet, Emma Thompson, Rowan Atkinson, JADE.

Sandi Toksvig has a picnic with Alan Davies, Romesh Ranganathan, Rachel Parris and Richard Osman.

Sandi Toksvig looks at plants with Alan Davies, Sara Pascoe, Stephen K. Amos and Jason Manford.

Witnessing Hurricane Ida's devastation as it reduces Louisiana to rubble; following a man running for his life from California wildfires; facing a deadly sea swirl with a Norwegian ship crew; looking for a snow kiter engulfed by an avalanche.

A cigar-shaped hole in the clouds in Michigan; how to explain ghostly ice apples that appear on a tree after a ferocious winter storm; a strange jelly that falls from the sky into a garden in West Virginia.

The view from above reveals; baffling behavior from one of the ocean's fastest fish; whales with a strange, aquatic accessorizing habit; a confounding congregation of sharks down under; and a perplexing collection of circles decorating the seabed.

Contemplate the strange disappearance and reappearance of the master of macabre, Edgar Allan Poe, just before his death in 1849; explore the chilling rumor that Shakespeare's grave was robbed, then chase down thieves who stole the Mona Lisa in 1911.

Budding entrepreneurs get three minutes to pitch their business ideas to five multimillionaires who are willing to invest their own cash to kick-start the businesses in the original "Shark Tank." After each pitch, the Dragons have the opportunity to ask questions about the venture. The entrepreneurs don't always have to answer, but of course what they choose not to address could very well affect the outcome. The pitch is over when each of the Dragons has declared,"I'm out." Evan Davis hosts.

Exhume chilling insights into ancient rituals, legendary warriors, and brutal deaths; investigate dozens of children's skeletons in Peru, find out if Amazon warriors once lived in Russia, and see what a UK cave full of butchered remains reveals.

Contemplate the strange disappearance and reappearance of the master of macabre, Edgar Allan Poe, just before his death in 1849; explore the chilling rumor that Shakespeare's grave was robbed, then chase down thieves who stole the Mona Lisa in 1911.

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.

Fails include an overpass fire, a downed radio telescope and a sinking airport.

Sandi Toksvig has a picnic with Alan Davies, Romesh Ranganathan, Rachel Parris and Richard Osman.

Paid programming.

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.

As the four-month assessment approaches, the handlers test different ways of connecting with their pups; one naughty kelpie gets a devilish new name.

A guinea pig named JT has a life-threatening tooth issue, a duck named Dick has a septic joint that needs cleaning, and Savannah and Dayle head to La Ronge, SK. to speak to a class of high schoolers and mentor the next generation of veterinarians.

Patching up a snake-bitten kitty cat and a bearded dragon with an odd leg swelling.

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

Sandi Toksvig delves into the public and the private with Alan Davies, Victoria Coren Mitchell, Phill Jupitus and Bridget Christie.

Sandi Toksvig looks at pictures with Alan Davies, Hannah Gadsby, Noel Fielding and Joe Lycett.

Budding entrepreneurs get three minutes to pitch their business ideas to five multimillionaires who are willing to invest their own cash to kick-start the businesses in the original "Shark Tank." After each pitch, the Dragons have the opportunity to ask questions about the venture. The entrepreneurs don't always have to answer, but of course what they choose not to address could very well affect the outcome. The pitch is over when each of the Dragons has declared,"I'm out." Evan Davis hosts.

Timothée Chalamet, Emma Thompson, Rowan Atkinson, JADE.

Sandi Toksvig has a picnic with Alan Davies, Romesh Ranganathan, Rachel Parris and Richard Osman.

Sandi Toksvig looks at plants with Alan Davies, Sara Pascoe, Stephen K. Amos and Jason Manford.

Tiptoe across an ancient burial ground in Panama and discover an Aboriginal time capsule after a bushfire rips across Australia. Address urgent questions about disease and mass burials in Nova Scotia, then find buried treasure in an Iraqi holy site.

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

Old Tombs, buried coins, and a 4,000-year-old oak log coffin are discovered.

Track a storm-ignited Colorado wildfire, a toxic New Zealand volcanic eruption, and an apocalyptic Appalachian flood from above. Discover how a distant earthquake and poor construction caused a towering Bangkok skyscraper to collapse in seconds.

Tiptoe across an ancient burial ground in Panama and discover an Aboriginal time capsule after a bushfire rips across Australia. Address urgent questions about disease and mass burials in Nova Scotia, then find buried treasure in an Iraqi holy site.

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.

Budding entrepreneurs get three minutes to pitch their business ideas to five multimillionaires who are willing to invest their own cash to kick-start the businesses in the original "Shark Tank." After each pitch, the Dragons have the opportunity to ask questions about the venture. The entrepreneurs don't always have to answer, but of course what they choose not to address could very well affect the outcome. The pitch is over when each of the Dragons has declared,"I'm out." Evan Davis hosts.

Exhume chilling insights into ancient rituals, legendary warriors, and brutal deaths; investigate dozens of children's skeletons in Peru, find out if Amazon warriors once lived in Russia, and see what a UK cave full of butchered remains reveals.

Fails include an overpass fire, a downed radio telescope and a sinking airport.

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

Tiptoe across an ancient burial ground in Panama and discover an Aboriginal time capsule after a bushfire rips across Australia. Address urgent questions about disease and mass burials in Nova Scotia, then find buried treasure in an Iraqi holy site.

Fails include an overpass fire, a downed radio telescope and a sinking airport.

Track a storm-ignited Colorado wildfire, a toxic New Zealand volcanic eruption, and an apocalyptic Appalachian flood from above. Discover how a distant earthquake and poor construction caused a towering Bangkok skyscraper to collapse in seconds.

Sandi Toksvig looks at plants with Alan Davies, Sara Pascoe, Stephen K. Amos and Jason Manford.

Paid programming.

Exhume chilling insights into ancient rituals, legendary warriors, and brutal deaths; investigate dozens of children's skeletons in Peru, find out if Amazon warriors once lived in Russia, and see what a UK cave full of butchered remains reveals.

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.

Old Tombs, buried coins, and a 4,000-year-old oak log coffin are discovered.

Tiptoe across an ancient burial ground in Panama and discover an Aboriginal time capsule after a bushfire rips across Australia. Address urgent questions about disease and mass burials in Nova Scotia, then find buried treasure in an Iraqi holy site.

On a September morning in 1994, students at a Zimbabwe school witness a silver craft land in a nearby field; numerous adults corroborate the UFO sighting, but the children are silenced; many maintain their account of the incident is true.

When bears, wolves and foxes are your only neighbors, life can be pretty lonely. Add minus-60-degree days and a constant battle for the most basic necessities, and you have the daily challenges of people who live in remote corners of Alaska. This series takes viewers deep into an Alaskan winter to meet tough, resilient residents as they try to stay one step ahead of storms and man-eating beasts to survive the season. The closest neighbor to Sue Aikens is more than 300 miles away. Eric Salitan subsists solely on what he hunts and forages. Chip and Agnes Hailstone catch fish for currency in bartering for supplies, and Andy and Kate Bassich use their pack of sled dogs for transportation. Also highlighted is a time of year not always part of what viewers see in Alaska: spring! Ice is breaking, animals are waking, and residents face new tests before deep cold returns.

Track a storm-ignited Colorado wildfire, a toxic New Zealand volcanic eruption, and an apocalyptic Appalachian flood from above. Discover how a distant earthquake and poor construction caused a towering Bangkok skyscraper to collapse in seconds.

Trace the hidden legacy of a cancelled Canadian fighter jet and a failed CIA spy-cat experiment. See how these lost ideas resurfaced decades later, contributing to video games and global mapping tools in ways their creators never imagined.

Fly the unfriendly skies over a rugged desert where countless airplanes have crashed. Look for evidence of UFOs or an underground military base, try out a flight simulator, and learn why mountain waves make this region so deadly for aviators.

The NWS homesteaders race to finish their projects before the harsh Canadian winter fully sets in.

Sign off.

Fly the unfriendly skies over a rugged desert where countless airplanes have crashed. Look for evidence of UFOs or an underground military base, try out a flight simulator, and learn why mountain waves make this region so deadly for aviators.

The NWS homesteaders race to finish their projects before the harsh Canadian winter fully sets in.

Track a storm-ignited Colorado wildfire, a toxic New Zealand volcanic eruption, and an apocalyptic Appalachian flood from above. Discover how a distant earthquake and poor construction caused a towering Bangkok skyscraper to collapse in seconds.

Contemplate the strange disappearance and reappearance of the master of macabre, Edgar Allan Poe, just before his death in 1849; explore the chilling rumor that Shakespeare's grave was robbed, then chase down thieves who stole the Mona Lisa in 1911.

Fly the unfriendly skies over a rugged desert where countless airplanes have crashed. Look for evidence of UFOs or an underground military base, try out a flight simulator, and learn why mountain waves make this region so deadly for aviators.

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.

Trace the hidden legacy of a cancelled Canadian fighter jet and a failed CIA spy-cat experiment. See how these lost ideas resurfaced decades later, contributing to video games and global mapping tools in ways their creators never imagined.

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.

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.

Challenge long-held beliefs about Viking leadership, weaponry, and brutality; inspect a warriors tomb full of clues in Sweden, a sword of unparalleled quality in Norway, and a pile of headless skeletons in the UK that reveal unimaginable violence.

Budding entrepreneurs get three minutes to pitch their business ideas to five multimillionaires who are willing to invest their own cash to kick-start the businesses in the original "Shark Tank." After each pitch, the Dragons have the opportunity to ask questions about the venture. The entrepreneurs don't always have to answer, but of course what they choose not to address could very well affect the outcome. The pitch is over when each of the Dragons has declared,"I'm out." Evan Davis hosts.

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.

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.

Inspect a rusty boat in Florida that once held boundless treasure; creep around an Indiana house of correction that punished its residents; examine a metal menagerie on the front lines of a foreign attack and an upstate New York comedy incubator.

Rescuers aid a young girl trapped under rubble after a Turkish earthquake, all while a tsunami threatens to add to the turmoil; a father and daughter escape Oregon wildfires; a flash flood upstages an outdoor wedding.

Encounter abandoned pods that may have been designed by alien architects; explore a mysterious concrete channel in Bosnia; weave through a complex of odd shapes in Greenland; meet the mythical guardian of a Vietnamese building.

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.

A bizarre eruption of bubbles spotted on a giant lake; experts try to explain a forest of crooked trees; geometric shapes beneath the ocean that could signal an animal invasion.

Encounter abandoned pods that may have been designed by alien architects; explore a mysterious concrete channel in Bosnia; weave through a complex of odd shapes in Greenland; meet the mythical guardian of a Vietnamese building.

Uncover the origins of an LA zombie fire and a deadly Indian bridge collapse. See how superheated water fuelled a monster hurricane in Acapulco, then find out how biblical-level floods unleashed a rare, soil-dwelling mud bug plague across Australia.

Dust off a 57-foot Roman mosaic rattled loose by a Turkish earthquake, then encounter a lost cargo ship off the Israeli coast. Unlock an otherworldly boat during a Mexican drought and spot an Iron Age dagger embedded in a collapsed Polish cliff.

Fails include a disastrous shuttle mission, and an unwanted and very expensive airport.

Uncover the origins of an LA zombie fire and a deadly Indian bridge collapse. See how superheated water fuelled a monster hurricane in Acapulco, then find out how biblical-level floods unleashed a rare, soil-dwelling mud bug plague across Australia.

Dust off a 57-foot Roman mosaic rattled loose by a Turkish earthquake, then encounter a lost cargo ship off the Israeli coast. Unlock an otherworldly boat during a Mexican drought and spot an Iron Age dagger embedded in a collapsed Polish cliff.

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

Rescuers aid a young girl trapped under rubble after a Turkish earthquake, all while a tsunami threatens to add to the turmoil; a father and daughter escape Oregon wildfires; a flash flood upstages an outdoor wedding.

A bizarre eruption of bubbles spotted on a giant lake; experts try to explain a forest of crooked trees; geometric shapes beneath the ocean that could signal an animal invasion.

Encounter abandoned pods that may have been designed by alien architects; explore a mysterious concrete channel in Bosnia; weave through a complex of odd shapes in Greenland; meet the mythical guardian of a Vietnamese building.

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.

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 NWS homesteaders race to finish their projects before the harsh Canadian winter fully sets in.

A long-forgotten network of Native American earthworks; a baffling battlefield mystery in Belgium; a mysterious blood-red lake on a remote Greek island; an eerie pink glow emulating from the middle of the Pacific Ocean.

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.

Dive into the historical and natural secrets of the deep; explore an uninhabited concrete island, ocean spirals off the Australian coast, underwater evidence of a violent past and tracks thousands of metres below the sea's surface.

Budding entrepreneurs get three minutes to pitch their business ideas to five multimillionaires who are willing to invest their own cash to kick-start the businesses in the original "Shark Tank." After each pitch, the Dragons have the opportunity to ask questions about the venture. The entrepreneurs don't always have to answer, but of course what they choose not to address could very well affect the outcome. The pitch is over when each of the Dragons has declared,"I'm out." Evan Davis hosts.

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 long-forgotten network of Native American earthworks; a baffling battlefield mystery in Belgium; a mysterious blood-red lake on a remote Greek island; an eerie pink glow emulating from the middle of the Pacific Ocean.

Scattered across the United States are abandoned structures, forgotten ruins of the past and monuments to a bygone era that reveal the secrets of a hidden America.

Molten lava devours homes and lives when a volcano erupts on La Palma; an entire U.S. town submerged by endless downpours; colossal ice boulders in Italy.

A sprawling military facility dotted with bunkers for miles now stands abandoned in the American heartland of Edgemont, S.D.; experts investigate and uncover a once highly-secure WWII ordnance site designed to store deadly munitions.

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 the cause of the mysterious pink glow lighting up the nighttime sky; asking if a bizarre underwater entity spells danger for divers; examining how trees can go wandering across the land.

A sprawling military facility dotted with bunkers for miles now stands abandoned in the American heartland of Edgemont, S.D.; experts investigate and uncover a once highly-secure WWII ordnance site designed to store deadly munitions.

In Alberta, a routine neuter turns tricky for a big old tomcat; a young dog needs a full workup to assess her injuries after getting hit by a car; in Vanderhoof, Dr. Cori is shocked when a boxer named Gemma suddenly can't feel her feet.

Experience the day-to-day drama of life in New Zealand's biggest doggy daycare.

Experience the day-to-day drama of life in New Zealand's biggest doggy daycare.

Cheer as big baby Yodel faces his fears, then get ready to graduate with Mabel.

Dr. Cori does emergency surgery on Bijoux, a tiny shih tzu puppy in a life-or-death situation; Dr. Allison brings her veterinarian skills to help a small northern Saskatchewan Cree community with the health of their pets.

Dr. Poitras and her team jump into action when they find an alarming mass on a beloved golden retriever named Rosey; Dr. Cori calms an anxious dog and offers some advice regarding new puppies when she meets an adorable chihuahua named Diesel.

Dr. Emma takes on her first rabbit surgery and tackles her fear of rodents; Dr. Allison and the team realize Callie the dog has more than a sore tooth when a routine dental reveals bigger problems below the surface.

Experience the day-to-day drama of life in New Zealand's biggest doggy daycare.

Experience the day-to-day drama of life in New Zealand's biggest doggy daycare.

Cheer as big baby Yodel faces his fears, then get ready to graduate with Mabel.

Dr. Cori does emergency surgery on Bijoux, a tiny shih tzu puppy in a life-or-death situation; Dr. Allison brings her veterinarian skills to help a small northern Saskatchewan Cree community with the health of their pets.

Dr. Poitras and her team jump into action when they find an alarming mass on a beloved golden retriever named Rosey; Dr. Cori calms an anxious dog and offers some advice regarding new puppies when she meets an adorable chihuahua named Diesel.

Molten lava devours homes and lives when a volcano erupts on La Palma; an entire U.S. town submerged by endless downpours; colossal ice boulders in Italy.

Investigating the cause of the mysterious pink glow lighting up the nighttime sky; asking if a bizarre underwater entity spells danger for divers; examining how trees can go wandering across the land.

A sprawling military facility dotted with bunkers for miles now stands abandoned in the American heartland of Edgemont, S.D.; experts investigate and uncover a once highly-secure WWII ordnance site designed to store deadly munitions.

Dive into the historical and natural secrets of the deep; explore an uninhabited concrete island, ocean spirals off the Australian coast, underwater evidence of a violent past and tracks thousands of metres below the sea's surface.

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.

Investigate the sudden death of a tycoon linked to King Tut's tomb; search for three lighthouse keepers who vanished from the Flannan Isles, then analyze the gruesome, unexplained deaths of nine hikers at the Dyatlov Pass in the Ural Mountains.

Revealing the truth behind the planet's ancient legends; touring an island covered in polar bears, twin craters in Greece, peeking at a supervolcano hidden under Yellowstone Park and examining an ocean formation that's eerily similar to Atlantis.

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.

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.

Budding entrepreneurs get three minutes to pitch their business ideas to five multimillionaires who are willing to invest their own cash to kick-start the businesses in the original "Shark Tank." After each pitch, the Dragons have the opportunity to ask questions about the venture. The entrepreneurs don't always have to answer, but of course what they choose not to address could very well affect the outcome. The pitch is over when each of the Dragons has declared,"I'm out." Evan Davis hosts.

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.

Revealing the truth behind the planet's ancient legends; touring an island covered in polar bears, twin craters in Greece, peeking at a supervolcano hidden under Yellowstone Park and examining an ocean formation that's eerily similar to Atlantis.

A research facility spawns new technology with earth-shattering implications; a coastal haven for African Americans changes the nation; a forgotten fortress fights off a Nazi submarine; a staunch building stands firm on San Francisco's darkest day.

An Ontario man flings into a tornado; a helicopter and jet ski rescue team go into an intense flood; an avalanche crashes a party; an adventurer survives being trapped upside down in a raging river in Papua New Guinea.

A historic sea vessel rusts in the Delaware River; experts investigate and reveal a passenger liner and the architecture that doubled as a U.S. warship.

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.

An arid desert is engulfed with swirling waters and powerful vortices; a bizarre purple blob appears over a paradise island.

A historic sea vessel rusts in the Delaware River; experts investigate and reveal a passenger liner and the architecture that doubled as a U.S. warship.

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.

Underground chambers, medieval tombs, old ruins and fossils are uncovered.

A historic sea vessel rusts in the Delaware River; experts investigate and reveal a passenger liner and the architecture that doubled as a U.S. warship.

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.

Underground chambers, medieval tombs, old ruins and fossils are uncovered.

Trace the hidden legacy of a cancelled Canadian fighter jet and a failed CIA spy-cat experiment. See how these lost ideas resurfaced decades later, contributing to video games and global mapping tools in ways their creators never imagined.

An Ontario man flings into a tornado; a helicopter and jet ski rescue team go into an intense flood; an avalanche crashes a party; an adventurer survives being trapped upside down in a raging river in Papua New Guinea.

An arid desert is engulfed with swirling waters and powerful vortices; a bizarre purple blob appears over a paradise island.

A historic sea vessel rusts in the Delaware River; experts investigate and reveal a passenger liner and the architecture that doubled as a U.S. warship.

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.

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.

Challenge long-held beliefs about Viking leadership, weaponry, and brutality; inspect a warriors tomb full of clues in Sweden, a sword of unparalleled quality in Norway, and a pile of headless skeletons in the UK that reveal unimaginable violence.

Walking among colossal wonders scattered across the Earth's surface, including an ancient reptile skeleton, a massive head carving in the Alberta badlands, a giant South African footprint and a pentagram etched into a remote peninsula in Kazakhstan.

Connecting the Great Pyramid to an archeological find near the Suez Canal; unveiling the secrets of colossal rock sculptures in Saudi Arabia; a mystical geological formation deep in the Sahara; unmasking a 37-million-year-old Egyptian enigma.

The West Coast is home to the San Andreas Fault, stretching for almost a thousand miles beneath the feet of millions of Americans.

Budding entrepreneurs get three minutes to pitch their business ideas to five multimillionaires who are willing to invest their own cash to kick-start the businesses in the original "Shark Tank." After each pitch, the Dragons have the opportunity to ask questions about the venture. The entrepreneurs don't always have to answer, but of course what they choose not to address could very well affect the outcome. The pitch is over when each of the Dragons has declared,"I'm out." Evan Davis hosts.

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.

Walking among colossal wonders scattered across the Earth's surface, including an ancient reptile skeleton, a massive head carving in the Alberta badlands, a giant South African footprint and a pentagram etched into a remote peninsula in Kazakhstan.

Tour a gun making company town in Connecticut and a Jersey Shore facility that revolutionized transatlantic communication; investigate a Colorado plain that was the site of a brutal labor battle, then check out a fairytale mansion in New Hampshire.

A tornado bears down on a man and his dog in a New Jersey basement; holding back wildfires with a new homeowner in Australia; a Colorado hailstorm; a Norwegian boxer punches his way through deadly ice.

A sprawling military facility dotted with bunkers for miles now stands abandoned in the American heartland of Edgemont, S.D.; experts investigate and uncover a once highly-secure WWII ordnance site designed to store deadly munitions.

Connecting the Great Pyramid to an archeological find near the Suez Canal; unveiling the secrets of colossal rock sculptures in Saudi Arabia; a mystical geological formation deep in the Sahara; unmasking a 37-million-year-old Egyptian enigma.

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

A sprawling military facility dotted with bunkers for miles now stands abandoned in the American heartland of Edgemont, S.D.; experts investigate and uncover a once highly-secure WWII ordnance site designed to store deadly munitions.