Actor Peter Stormare teams up with a history enthusiast to investigate a mysterious relic that could be evidence of Viking settlement in America centuries before Columbus, but some think it's a hoax.

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

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 mysterious glowing green entity is seen in Australia's nighttime sky; footage of a twisting fire worm may confirm a local legend about a cave-dwelling super serpent.

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

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

On Aug. 4, 2020, Hurricane Isaias slams into the North Carolina coast before tracking northward, spawning 37 tornadoes in eight states and causing catastrophic flooding in Pennsylvania.

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

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

On Aug. 4, 2020, Hurricane Isaias slams into the North Carolina coast before tracking northward, spawning 37 tornadoes in eight states and causing catastrophic flooding in Pennsylvania.

The view from above reveals; baffling behaviour 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.

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.

On Aug. 4, 2020, Hurricane Isaias slams into the North Carolina coast before tracking northward, spawning 37 tornadoes in eight states and causing catastrophic flooding in Pennsylvania.

An eagle falls out of its nest; Hope's fawns are in trouble; an attic full of songbirds.

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.

Bruce and Darka have recently retired; they are also active scuba divers and want to find a lakefront property that will accommodate their passion for the sport, as well as entertaining friends and family.

A healthy bison population is threatened by where they eat.

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

A housecat named Smoky is at risk of diabetes and a barn cat named Ashes is in rough shape after being hit by a car; Savannah heads out with the Canadian Animal Task Force to round up, spay/neuter, and release dozens of feral cats from a village.

A dental surgery goes from one tooth to nine teeth for a pair of unsuspecting dog owners; Savannah must investigate to figure out why a ferret named Sophie has stopped peeing, and a bunny needs intervention to stop him from biting at his sutures.

Mike Holmes inspects a basement suite and finds far more wrong with it than the home inspector did.

Sizing up answers with the contestants, who are sure they know what's right, what's wrong, and what's plain old impossible; battling through three mind-bending rounds of competition.

The second batch of bakers enter the tent; in the Technical they take on a cake pop with an expression they won't want to see on the judges' faces; in the Showstopper they reveal their hidden talents.

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

When an investigator is drawn to a giant, abandoned facility revealed from the skies, he uncovers structures that helped to define the course of 20th century conflict. And why did the Japanese try to wipe an entire island from history?

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.

Hollywood actor Peter Stormare and Elroy Balgaard begin a brand-new excavation at the mysterious Runestone Hill.

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

Traipsing along ancient pathways criss-crossing Easter Island; finding gigantic designs carved into Asia's Eastern Steppe; ascending a tall pyramid rising from Antarctica's icy landscape.

On Aug. 4, 2020, Hurricane Isaias slams into the North Carolina coast before tracking northward, spawning 37 tornadoes in eight states and causing catastrophic flooding in Pennsylvania.

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, and a sunken ship in Utah's Great Salt Lake.

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

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.

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.

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

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

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 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.

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

An old volunteer returns; an endangered orphan is rescued; a miracle on the half shell.

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.

Best friends and single moms Karem and Sarah are searching for a new home to purchase together.

The Grasslands National Park protects the North American mixed grass prairie.

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.

An elderly dog named Freddie has a rare form of cancer that requires quick intervention, a barn cat named Suzie needs help to feed her kittens, and Savannah heads to Back to Batoche - the largest Métis festival in the world.

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

A blended family has its townhouse inspected.

Picking through a minefield of answers as the challengers clash for 10,000 pounds.

The bakers are tasked with making biscuits that look like poop emojis; they're challenged with making fairy tale-themed cookies.

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

A strange mound emerging from a Turkish hillside leads a journalist along a 2,000-year trail of bloodshed and riches; a giant pattern in South America is evidence of a battle being waged for control of the future.

Exploring some of the most cavernous places on the planet, including an expansive Siberian crater with no explainable origin, Greenland's bizarre black holes, an ancient forbidden well in the Yemeni desert, and a voluminous void in Antarctica.

While the excavation continues Peter and Elroy go back to their investigation to clear Olof's name; they meet a Native American professor who gives them some new knowledge about the history of the area and his tribe.

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

A perfect circle carved around an ancient peak; a scary phenomenon in the Pacific; strange shapes in a Middle Eastern desert; a formation below the ocean's surface.

Picking through a minefield of answers as the challengers clash for 10,000 pounds.

Featuring Graham trading quips with Paul Mescal, Denzel Washington, Saoirse Ronan, Eddie Redmayne and Blossoms.

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

Stephen Fry goes looking for monsters with Sara Pascoe, Josh Widdicombe, Phill Jupitus and Alan Davies.

Stephen Fry discusses a messy mixture of M-themed matters with Sarah Millican, Eddie Kadi, Noel Fielding, and Alan Davies.

Featuring Graham trading quips with Paul Mescal, Denzel Washington, Saoirse Ronan, Eddie Redmayne and Blossoms.

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

Stephen Fry goes looking for monsters with Sara Pascoe, Josh Widdicombe, Phill Jupitus and Alan Davies.

Stephen Fry discusses a messy mixture of M-themed matters with Sarah Millican, Eddie Kadi, Noel Fielding, and Alan Davies.

Picking through a minefield of answers as the challengers clash for 10,000 pounds.

A mysterious glowing green entity is seen in Australia's nighttime sky; footage of a twisting fire worm may confirm a local legend about a cave-dwelling super serpent.

Graffiti scratched into the walls of a military base on the British coast sheds light on a secret raid against the Nazis; the story left behind by the soldiers does not match the rosy picture that was painted by the media.

A bald eagle needs Hope's help; a small but lethal patient keep the entire staff on their toes.

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

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

Cottage living, maintenance and gardening.

Unlock military secrets from the air; spot a Nazi weapon designed to turn the tides of war in France; a covert Russian military tower in Chernobyl's shadow; a rumoured nuclear lab buried in Australia; a hush-hush surprise underneath Alcatraz.

Over a hundred big concrete arrows scattered across the U.S.; a giant chalk figure with an oversized phallus on an English hillside; a mysterious hole in the middle of a lake in Southern California.

Chris starts his season with a massive catch of Tullibee, only to see his happiness cut short; Justin and Mike start in Hecla and hit the motherlode; a critical fish market closes; Richard's close call on the ice.

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

Brothers Andrew and Kevin are stoked to finally be in British Columbia, the final stop on their cross-Canada journey.

Jill wants to convert her garage into a cozy painting studio.

The potters make a garden totem sculpture that tells their life story, followed by a regal devil's work challenge set by Rich Miller.

Britain's best home sewers are tested on their sewing and dressmaking skills.

Rav ramps up the pressure in the Technical by asking the bakers to make her favorite guilty pleasure; later, the bakers are tasked with creating superheroes from choux.

Stories of escape that defy explanation; Harry Houdini pulls off escape acts; an attempted prison break from Alcatraz Federal Penitentiary; one man receives guidance that allows him to escape the South Tower of the World Trade Center on 9/11.

A house that narrowly dodges the path of a tornado; rain that falls from the sky like blood; lightning that follows into the home.

A miraculous meteorite falling from the heavens and a chunk of sandstone considered so sacred that wars have been fought to protect it; throughout history, many have insisted that simple stones can do everything from choosing a king to causing death.

Can humans predict the future by use of prophets and dreams, if so, can humankind harness this knowledge to avoid future deadly events.

Unlock military secrets from the air; spot a Nazi weapon designed to turn the tides of war in France; a covert Russian military tower in Chernobyl's shadow; a rumoured nuclear lab buried in Australia; a hush-hush surprise underneath Alcatraz.

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

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

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

With less than a month left in the fishing season, all crews are desperate to catch their remaining quota, and failing to do so means leaving money on the table; Justin and Mike are fighting to hit their target.

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

Stories of escape that defy explanation; Harry Houdini pulls off escape acts; an attempted prison break from Alcatraz Federal Penitentiary; one man receives guidance that allows him to escape the South Tower of the World Trade Center on 9/11.

A house that narrowly dodges the path of a tornado; rain that falls from the sky like blood; lightning that follows into the home.

A miraculous meteorite falling from the heavens and a chunk of sandstone considered so sacred that wars have been fought to protect it; throughout history, many have insisted that simple stones can do everything from choosing a king to causing death.

Can humans predict the future by use of prophets and dreams, if so, can humankind harness this knowledge to avoid future deadly events.

Frightening ice conditions and poor weather make the early season treacherous; Justin and Mike experience a violent ice-quake that leaves them rattled; Trevor contends with other fishermen setting their nets too close to his.

Dennis and Melanie hunt for a lakehouse that can serve as both their home and workspace; Melanie is looking for a space that can accommodate her dance business, while Dennis wants the perfect man cave.

Jordan and Aurelio search for a home that can accommodate their growing family in the future; they have a few big-ticket items on their wish list, including a gourmet kitchen, home office, dedicated children's room and a gym.

Salvaging a 50-foot motor yacht in Islamorda, Fla.; a 44-foot launch hung up on a dam on the Mississippi River; repairing a major storm gate in the British Isles.

Jeremy Birch takes on a salvage to raise a vessel with a concrete hull; it's been in the Fraser River for a month, collecting silt and mud, adding 30 tons to its deadweight.

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

Balancing on a knife's edge as a crucial bridge is left hanging over a canyon on California's Pacific Coast Highway; a high-speed train disaster in Germany; a Vegas casino inferno; a sinking feeling in an Australian apartment building.

Stories of escape that defy explanation; Harry Houdini pulls off escape acts; an attempted prison break from Alcatraz Federal Penitentiary; one man receives guidance that allows him to escape the South Tower of the World Trade Center on 9/11.

A house that narrowly dodges the path of a tornado; rain that falls from the sky like blood; lightning that follows into the home.

A miraculous meteorite falling from the heavens and a chunk of sandstone considered so sacred that wars have been fought to protect it; throughout history, many have insisted that simple stones can do everything from choosing a king to causing death.

Can humans predict the future by use of prophets and dreams, if so, can humankind harness this knowledge to avoid future deadly events.

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

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.

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.

Witness jaw-dropping animal spectacles from high above the Earth. Watch a whirling herd of northern nomads, see undersea behemoths show off in the Pacific shallows, track a US porcine stampede, and confront top ocean predators on the Florida coast.

Alaska is a challenging place, but tenacity of the spirit makes it home.

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

A monstrous airplane that helped America reach new, historic heights sits decommissioned in Tucson, Ariz.; experts investigate and reveal one of the most important aircraft of the 20th century and its contribution to the Apollo spaceflight program.

Sign off.

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

A monstrous airplane that helped America reach new, historic heights sits decommissioned in Tucson, Ariz.; experts investigate and reveal one of the most important aircraft of the 20th century and its contribution to the Apollo spaceflight program.

A hunt for a misunderstood coyote; the ravens have worn out their welcome and need a new home.

Alaskans rediscover old practices to get through the heart of winter.

Alaska is a challenging place, but tenacity of the spirit makes it home.

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.

As climate change has accelerated, weather has mutated and become more dangerous and unpredictable.

Stories of ghost towns, including Pripyat and Hashima Island.

Contractor extraordinaire Mike Holmes has helped hundreds of people get the home or renovation they deserve, but now the homeowner who needs a hand is his son Mike Jr (MJ). "Holmes & Holmes" documents their working and personal relationship as they tackle the renovation of MJ's 750-square-foot bungalow so he and girlfriend Lisa can have a place of their own to start a family. Of course, no sooner is MJ's modest fix-up turned upside down by Mike's ambitious plans to gut the house and add a second story. Each hourlong episode focuses on one stage of the construction process and showcases the latest construction materials and build techniques.

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.

Personal stories of those caught up in sometimes deadly natural catastrophes, accompanied by camera footage showing meteorological phenomena, including hurricanes, earthquakes, monsoons and more.

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

Following marine salvage teams as they race against the clock to recover ships wrecked by fierce storms that rage across the globe.

Game show presented by Rick Edwards in which questions have a correct, an incorrect and an impossible answer.

Mike Holmes can fix just about everything. His motto reads: "If you're going to do something, do it right the first time." And that definitely applies to his home renovation work, which is featured in this series as he and his crew rescue homeowners victimized by shoddy contractors. Holmes is a warmhearted, straight-shooting regular guy who tells it like it is, especially when it comes to messy builders and the sloppy, lazy jobs they leave behind.

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

Mike Holmes can fix just about everything. His motto reads: "If you're going to do something, do it right the first time." And that definitely applies to his home renovation work, which is featured in this series as he and his crew rescue homeowners victimized by shoddy contractors. Holmes is a warmhearted, straight-shooting regular guy who tells it like it is, especially when it comes to messy builders and the sloppy, lazy jobs they leave behind.

The Pacific Rim National Park Reserve is one of Canada's most beautiful and powerful parks.

Mike Holmes can fix just about everything. His motto reads: "If you're going to do something, do it right the first time." And that definitely applies to his home renovation work, which is featured in this series as he and his crew rescue homeowners victimized by shoddy contractors. Holmes is a warmhearted, straight-shooting regular guy who tells it like it is, especially when it comes to messy builders and the sloppy, lazy jobs they leave behind.

Paid programming.

The bakers make brightly colored tiger pretzels; they go wild making animals sculpted from bread.

Across North America and the rest of the world, hurricanes, storm surges, earthquakes and sea level rise threaten major cities and lead to natural catastrophes.

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

Pushing the boundaries of scientific innovation and engineering often results in mind-boggling building achievements. Unfortunately, progress can also produce leaning towers of terror. This series showcases the latter - engineering disasters, from the hilarious to the mind-boggling, from the deadly to the bank-busting. Episodes profile, investigate and analyze outrageous structural gaffes, then tell of genius resolutions to solve the issues. Blunders include an airport that is sinking into the sea, an upside-down bridge, and a waterfront building that creates a dangerous wind tunnel.

Satellite images capture a mysterious fortification concealed beneath a patch of woodland in the remote stretches of Norfolk, England; experts investigate rival royal families and a lost castle that was destroyed during a medieval blood feud.

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

Decoding the secrets of long-lost human settlements; scrutinizing a mysterious Norwegian mound, a prehistoric stone circle on the banks of the Tagus River, a lost city in the cradle of civilization and bizarre rock shapes.

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

Hollywood actor Peter Stormare and Elroy Balgaard investigate new leads; when they meet a Native American professor who provides new information, they realize they must expand their investigation to the East Coast.

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

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

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

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.

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

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, and a sunken ship in Utah's Great Salt Lake.

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

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..

Using cutting-edge CGI, archive footage and expert interviews, examine mysterious curiosities that have been uncovered by extreme weather and calamitous incidents.

A bomb cyclone detonates across northeast America.

Cameras around the globe capture unexplainable weather phenomena, from a rainfall of blood to clouds that can kill.

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

Personal stories of those caught up in sometimes deadly natural catastrophes, accompanied by camera footage showing meteorological phenomena, including hurricanes, earthquakes, monsoons and more.

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..

Using cutting-edge CGI, archive footage and expert interviews, examine mysterious curiosities that have been uncovered by extreme weather and calamitous incidents.

A bomb cyclone detonates across northeast America.

Across North America and the rest of the world, hurricanes, storm surges, earthquakes and sea level rise threaten major cities and lead to natural catastrophes.

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

Cameras around the globe capture unexplainable weather phenomena, from a rainfall of blood to clouds that can kill.

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

Pushing the boundaries of scientific innovation and engineering often results in mind-boggling building achievements. Unfortunately, progress can also produce leaning towers of terror. This series showcases the latter - engineering disasters, from the hilarious to the mind-boggling, from the deadly to the bank-busting. Episodes profile, investigate and analyze outrageous structural gaffes, then tell of genius resolutions to solve the issues. Blunders include an airport that is sinking into the sea, an upside-down bridge, and a waterfront building that creates a dangerous wind tunnel.

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

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.

Severe flooding forces families across Europe onto their rooftops; a Nepali avalanche; deadly wildfires in the Sierra Nevada; an eastern U.S. whiteout that strands motorists for 24 hours in their cars.

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

Allison brings her work home; some orphans try to make a break for it while Allison and Hope are away.

Cameras around the globe capture unexplainable weather phenomena, from a rainfall of blood to clouds that can kill.

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.

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.

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

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

Bakers are challenged to make decadent brownies paired with chocolate pudding and whipped cream; then, they make a monstrous showstopper.

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

Satellite images capture miles of aircraft precisely arranged in the vast Arizona desert; experts investigate the largest aircraft storage facility on Earth and the rotting remains of a defining moment in Cold War history.

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.

They finally get to see the famous Maine Penny and their visit to the Maine State Museum opens their minds to new possibilities; afterwards they meet anthropologist Harald Prins.

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

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.

Check in with the Holmes team as they make upgrades to Linda and Stuart's home that will help Linda get back to life after a surprise leg amputation. Feel the relief as they create wheelchair-accessible spaces and remove barriers to her independence.

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

Andrew and Kevin start their journey in Nova Scotia, Canada; they're preparing to drive their vintage RV on a summer-long, cross-Canada adventure but before they hit the road, they're retrofitting their ride to run on recycled vegetable oil.

Brothers Andrew and Kevin are stoked to finally be in British Columbia, the final stop on their cross-Canada journey.

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.

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

Andrew and Kevin start their journey in Nova Scotia, Canada; they're preparing to drive their vintage RV on a summer-long, cross-Canada adventure but before they hit the road, they're retrofitting their ride to run on recycled vegetable oil.

Brothers Andrew and Kevin are stoked to finally be in British Columbia, the final stop on their cross-Canada journey.

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.

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

Alaskans take advantage of a brief reprieve from Dark Winter's wrath.

As winter turns to spring, Alaskans must seize the warming days.

The open house is bigger than ever, which brings about more challenges.

A widow needs help completing the DIY projects her "Good Samaritan" husband had started around the house before he passed away.

A single homeowner struggles with maintenance issues and repairs; when neighbors start complaining about the state of her home's exterior, Next Generation steps in to help her improve her home's curb appeal and get rid of the abandoned backyard pool.

A couple needs help updating their kitchen before putting their house on the market; after a local contractor lets them down and squanders their budget, Mike and the team swoop in to make things right and give this family a fresh start.

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.

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

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

Judge Ravneet Gill raises the bar with a sweet churro challenge; the remaining bakers must make pies with a savory filling.

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

Satellite images capture an enormous X shape mysteriously carved with precision in the remote Nevada desert; experts investigate a military emergency landing field linked to one of the most astonishing test programs in aviation history.

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, and a time-worn secret in the wilds of Peru.

After an intense search for more tangible evidence Peter and Elroy choose a new direction; each artifact leads them deeper into a web of mysterious symbols and conspiracies.

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

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.

A paradise beach in the Bahamas is transformed as the ocean simply vanishes; a woman films the silhouette of a 12-foot monster lurking in the fog.

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.

Crushing seismic shocks and tools that could predict the next big one.

On March 3, 2020, a super cell makes it way across Kentucky and sets its sights on Tennessee; that night, 10 tornados ranging from EF0 to EF4 touched down in Tennessee, leaving approximately $1.6 billion in damage and taking 25 lives.

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.

Crushing seismic shocks and tools that could predict the next big one.

On March 3, 2020, a super cell makes it way across Kentucky and sets its sights on Tennessee; that night, 10 tornados ranging from EF0 to EF4 touched down in Tennessee, leaving approximately $1.6 billion in damage and taking 25 lives.

A vanished Neolithic structure in an Irish farmer's field, an ancient oasis in the remote reaches of a Chinese desert, a centuries-old buried treasure in the U.K. and a dreaded predator in the Pacific Ocean are discovered by accident using drones.

Unlock military secrets from the air; spot a Nazi weapon designed to turn the tides of war in France; a covert Russian military tower in Chernobyl's shadow; a rumoured nuclear lab buried in Australia; a hush-hush surprise underneath Alcatraz.

On March 3, 2020, a super cell makes it way across Kentucky and sets its sights on Tennessee; that night, 10 tornados ranging from EF0 to EF4 touched down in Tennessee, leaving approximately $1.6 billion in damage and taking 25 lives.

Never seen before footage of Hope's greatest stories.

Counting down to the annual deer release, which could get shut down if a government inspection doesn't go according to plan; the staff scramble to help a hawk with a broken beak and vaccinate the raccoon unit against a potentially deadly virus.

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.

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

Paid programming.

Despite being the second smallest park in Canada, Point Pelee bird watching reputation is huge.

The top four bakers from each heat meet in the kitchen for Finals Week, where street foods - from falafel wraps to doughnuts - are on the menu.

Uncovering the mystery of the Holy Grail.

A ghost ship appears overnight on the shores of Ireland; it may help shed light on the fate of vessels claimed by the most notorious patch of ocean on earth.

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 South Pacific, and puzzling rocky constructions off the coast of Australia.

With the East Coast adventure slowly coming to an end Peter and Elroy contemplate what they have found and learnt throughout the journey; a new plan starts to form.

Uncovering the mystery of the Holy Grail.

Psychedelic swirls in the Utah wastelands; a bizarre configuration of circles in the Sahara; hidden lines with the help of a drone; a remote polka-dot lake in Canada.

On March 3, 2020, a super cell makes it way across Kentucky and sets its sights on Tennessee; that night, 10 tornados ranging from EF0 to EF4 touched down in Tennessee, leaving approximately $1.6 billion in damage and taking 25 lives.

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.

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

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

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.

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

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

Severe flooding forces families across Europe onto their rooftops; a Nepali avalanche; deadly wildfires in the Sierra Nevada; an eastern U.S. whiteout that strands motorists for 24 hours in their cars.

Vacationers end up trapped in a pool surrounded by fire; a Czech man faces a rare F4 tornado; an animal rescuer works in the aftermath of Hurricane Florence; a kayaker paddles through a pacific storm.

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.

A huge storm sweeps an unusual patient into Hope for Wildlife, and Hope tries to return him to his home.

Follow Hope Swinimer and her team as they rescue, treat, and release injured and orphaned wildlife.

Mike Holmes and his children tackle a renovation that has fallen off the tracks for expectant parents; the team is on a time-sensitive mission to finish the nursery and the only working bathroom in the house prior to the baby's arrival.

John and Tanya purchase a 171-year-old home after a contractor guarantees it has been totally updated; John and Tanya encounter one problem after another, and they worry someone is going to fall through their spongy and sinking family-room floor.

A marathon dreams of designing the perfect kitchen; she hires a contractor who is unqualified for the job and winds up compromising her home's structure; now, it's up to Mike and his children to make things right and restore her peace of mind.

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

Fire up another heat of competition as the players try to tease out which of Rick's answers are not just wrong but actually impossible; hang tight through three tense rounds and see who is left standing to face the 10,000-pound exclamation point.

The bakers are tasked with making a cake that's trendy in Japan and an array of tartlets featuring flavors from around the world.

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

Aerial images uncover a bizarrely shaped facility in Arizona; its story is one of the most infamous experiments of the 20th century, and analysts suspect that an isolated facility could have played a role in a secretive bioweapons program.

Tower over amazing metropolises. Learn why an important urban centre is sinking toward oblivion, soar over sprawling ruins buried under Saharan sands, learn the modern secret of an ancient fortress, and eye a ghost town on the edge of the Gobi.

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

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

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, and spot an immovable waterfall in Mexico.

Fire up another heat of competition as the players try to tease out which of Rick's answers are not just wrong but actually impossible; hang tight through three tense rounds and see who is left standing to face the 10,000-pound exclamation point.

Billy Crystal talks about his psychological drama series, "Before"; British stars Hugh Bonneville and Emily Mortimer together as Mr. and Mrs. Brown in Paddington in Peru.

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

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.

Billy Crystal talks about his psychological drama series, "Before"; British stars Hugh Bonneville and Emily Mortimer together as Mr. and Mrs. Brown in Paddington in Peru.

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

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.

Fire up another heat of competition as the players try to tease out which of Rick's answers are not just wrong but actually impossible; hang tight through three tense rounds and see who is left standing to face the 10,000-pound exclamation point.

A paradise beach in the Bahamas is transformed as the ocean simply vanishes; a woman films the silhouette of a 12-foot monster lurking in the fog.

In the Turkish capital, ambitious plans for a new amusement park are disrupted by financial, mechanical and political problems, forcing the park to close; now its old roller coasters stand as symbols of excess on the city skyline.

Hope cares for the first two beavers to arrive at the rehab centre and learns the fate of her most famous patient.

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.

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.

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

Andrew and Kevin start their journey in Nova Scotia, Canada; they're preparing to drive their vintage RV on a summer-long, cross-Canada adventure but before they hit the road, they're retrofitting their ride to run on recycled vegetable oil.

A new floor begins to lift up in areas.

Host Ellie Taylor joins returning judges Keith and Rich in welcoming the new batch of potters, and after shaping children's crockery sets and ceramic milk bottles, one of the 12 will be crowned the first potter of the week.

Britain's best home sewers are tested on their sewing and dressmaking skills.

Chocolate takes center stage for Finals Week as the top eight bakers make miso caramel chocolate tartlets and mini chocolate mousse mirror glaze cakes.

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

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

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