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

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.

In the aftermath of a devastating bushfire season, Zac and Darin learn about efforts to rehabilitate the wildlife and livestock population.

Discover the explosive power of these peaks and how humans adapt to their fury.

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

With the waterways open, Alaskans navigate rivers for key resources.

Asking if the seemingly miraculous parting of the Red Sea could be explained as a natural event; a famous bridge collapses in Italy; hundreds of whales are driven onto beaches around the world.

On the hunt for a steady supply of fish, Bentley and his father, Gary, brave subzero temperatures on a remote, frozen lake; Jon heads into the bush on a mission.

Dr. Cori's team is busy when they find a mysterious scar on a new shop cat and assist a puppy who was hurt after leaping from a car. Dr. Allison discovers an infection in a dog but is less confident in her dancing abilities as she learns to jig.

Volunteering with the Mission PAWSible mobile vet unit in a remote Indigenous community, Dr. Emma manages loose dogs getting rowdy at the clinic. A routine spay takes a shocking turn when she finds a bullet in a dog.

Phil Risko's team at Northstar works fast to refloat a trawler that's been blown onto the shore of a national park in New Jersey; the team improvises to get it back to sea before it suffers further damage.

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.

Texas police receive multiple calls about a 200-foot flying object; Two farmers witness the bizarre sighting up close; In Scotland, a property inspector is knocked unconscious when he comes in contact with a mysterious metallic object.

In Brazil, three men escape a close encounter that lasted hours longer than they realized; in Canada, a thirteen-year-old boy is blinded temporally after investigating a bizarre object near his home.

Dr. Cori's team is busy when they find a mysterious scar on a new shop cat and assist a puppy who was hurt after leaping from a car. Dr. Allison discovers an infection in a dog but is less confident in her dancing abilities as she learns to jig.

Paid programming.

Two members of Hope's team travel to England to discover new techniques and make allies on the front lines of animal rescue.

Problems with a contractor halt the addition of a much-needed second floor.

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.

Earthquakes, droughts and collapsing dams expose artifacts and graves.

The legendary city of Kish, Iraq, lies at the cradle of human civilization and home to some of the world's first kings; using cutting-edge tech, experts investigate the buried secrets of this lost city to uncover the first origins of royalty.

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.

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 twister traps teachers and pupils at an American school; wildfires rip across the moors in the north of England; in Argentina, a trek nearly ends in tragedy for a group of hikers; in Africa, a man is on a mission to descend into a volcano.

Hurricane Sally makes landfall along Alabama's Gulf Coast, the first tropical cyclone to do so since 2004; intensifying to a Category 2 storm and turning east just prior to landfall, Sally catches many residents along the panhandle by surprise.

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

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

A twister traps teachers and pupils at an American school; wildfires rip across the moors in the north of England; in Argentina, a trek nearly ends in tragedy for a group of hikers; in Africa, a man is on a mission to descend into a volcano.

Hurricane Sally makes landfall along Alabama's Gulf Coast, the first tropical cyclone to do so since 2004; intensifying to a Category 2 storm and turning east just prior to landfall, Sally catches many residents along the panhandle by surprise.

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

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.

The legendary city of Kish, Iraq, lies at the cradle of human civilization and home to some of the world's first kings; using cutting-edge tech, experts investigate the buried secrets of this lost city to uncover the first origins of royalty.

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.

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.

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

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

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 form the middle of the Pacific Ocean.

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; a sunken ship in Utah's Great Salt Lake.

Barry and Hayley's adventure in the UK continues at a rehab center where they use the latest in alternative therapies.

Mike does an inspection on the home of a savvy first time buyer.

The ancient necropolis of Abusir contains strange megastructures unlike any discovered in Egypt; experts gain rare access to investigate lost tombs and forgotten rituals to reveal the secrets of Egypt's Sun Cult pharaohs.

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.

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

The ancient necropolis of Abusir contains strange megastructures unlike any discovered in Egypt; experts gain rare access to investigate lost tombs and forgotten rituals to reveal the secrets of Egypt's Sun Cult pharaohs.

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 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.

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

Sandi Toksvig organizes an omnishambles with Josh Widdicombe, Stephen K. Amos, Cally Beaton and Alan Davies.

Sandi Toksvig welcomes Jason Manford, Jimmy Carr, Victoria Coren Mitchell and Alan Davies to take a look at oddball games.

In Orange NSW, first responders Chris and Mel have found all the cosmopolitan comforts of city living along with fresh air, big skies, open spaces and a sweet Edwardian fixer-upper called Bega.

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

Pick through a dizzying array of questions and answers as Rick tries to separate the winners from the rest of the pack; cheer as one lucky contestant gets a chance to unleash a spectacular torrent of 10,000 one-pound coins.

In Orange NSW, first responders Chris and Mel have found all the cosmopolitan comforts of city living along with fresh air, big skies, open spaces and a sweet Edwardian fixer-upper called Bega.

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..

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.

The ancient necropolis of Abusir contains strange megastructures unlike any discovered in Egypt; experts gain rare access to investigate lost tombs and forgotten rituals to reveal the secrets of Egypt's Sun Cult pharaohs.

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

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.

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

Discover the devastation snow can bring as a hurricane blizzard hits the eastern coast of Canada in 2020. Then glimpse its icy beauty in mesmerizing brinicles and snow flowers, and learn how artificial glaciers can be used to alleviate drought.

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.

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.

There are areas around the world that seem to keep attracting UFOs.

A bobcat kitten needs Hope's help but this little orphan causes big headaches.

A house with a big kitchen addition gets an inspection.

Nearly a decade after the ancient site of Nimrud was destroyed by terrorists, experts return to salvage the wreckage; archaeologists piece together the remaining ruins to reveal the origins and brutal decline of a lost empire.

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.

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

Nearly a decade after the ancient site of Nimrud was destroyed by terrorists, experts return to salvage the wreckage; archaeologists piece together the remaining ruins to reveal the origins and brutal decline of a lost empire.

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 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 deadly balloon bomb threatens the Manhattan Project during World War II; India is rocked by unexpected Himalayan floods outside monsoon season; a pandemic shuts down the world.

Share the terror as survivors relive the moment when these huge waves rushed in.

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.

A deadly balloon bomb threatens the Manhattan Project during World War II; India is rocked by unexpected Himalayan floods outside monsoon season; a pandemic shuts down the world.

Share the terror as survivors relive the moment when these huge waves rushed in.

Leaders and representatives of Aboriginal communities show Zac and Darin how indigenous cultures live to protect and preserve the land.

The Avenue of the Sphinxes has now been unearthed in the biggest excavation in Egyptian history; using cutting-edge CGI, investigators reveal the hidden secrets of the sphinxes.

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.

Nearly a decade after the ancient site of Nimrud was destroyed by terrorists, experts return to salvage the wreckage; archaeologists piece together the remaining ruins to reveal the origins and brutal decline of a lost empire.

Magic is in the air during the quarterfinal as contestants craft biscuit card towers from gingerbread and create revealing "fault line" cakes.

Kim and Pierre's trapline expansion is well underway when a troublesome local resident threatens to derail their plans; Jon and his wife Lally brave extreme arctic conditions as they attempt to secure a supply of food.

Past and future collide as the final days bring a very special visitor to camp; thoughts of going home fill the Adventurers with mixed emotions.

Months after the journey's end, the Indigenous explorers reflect with Caleb Musgrave on their time spent in Syilx territory; reunited for the first time, the group shares the moments that changed them forever.

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

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.

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

Paid programming.

Texas police receive multiple calls about a 200-foot flying object; Two farmers witness the bizarre sighting up close; In Scotland, a property inspector is knocked unconscious when he comes in contact with a mysterious metallic object.

Hope Swinimer rescues, rehabilitates and releases thousands of animals while struggling to make ends meet.

A homeowner finds something that could put the health of their small family at risk.

The Avenue of the Sphinxes has now been unearthed in the biggest excavation in Egyptian history; using cutting-edge CGI, investigators reveal the hidden secrets of the sphinxes.

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.

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

The Avenue of the Sphinxes has now been unearthed in the biggest excavation in Egyptian history; using cutting-edge CGI, investigators reveal the hidden secrets of the sphinxes.

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

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.

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

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

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

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

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.

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 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.

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.

The Avenue of the Sphinxes has now been unearthed in the biggest excavation in Egyptian history; using cutting-edge CGI, investigators reveal the hidden secrets of the sphinxes.

With pâtisserie as their proving ground, the remaining bakers must battle it out making handbag-shaped macarons and a 3-D choux pastry centerpiece.

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.

Dr. Cori sees it all, from stray puppies and anxious dogs with persistent paw injuries, to horses needing dental work. Dr. Allison tackles a growing lump on cuddly Jorah and takes an x-ray that means bad news for an older dog.

Dr. Allison and her team must monitor Shelby the Shih Tzu while trying to remove hundreds of tiny, grainy bladder stones; in Calgary, Dr. Emma and her team try to wrangle dogs for a blood drive.

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.

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.

Texas police receive multiple calls about a 200-foot flying object; Two farmers witness the bizarre sighting up close; In Scotland, a property inspector is knocked unconscious when he comes in contact with a mysterious metallic object.

In Brazil, three men escape a close encounter that lasted hours longer than they realized; in Canada, a thirteen-year-old boy is blinded temporally after investigating a bizarre object near his home.

The coastal metropolis of Miami faces a triple threat of crumbling limestone bedrock, ferocious superstorms and relentless rising oceans.

Mike does an inspection of a flipped house.

Palmyra: pearl of the Syrian desert; experts return to the site and use CGI reconstruction to reveal the secrets of Palmyra's ancient engineers.

A secret Russian military base in the Gobi Desert; a strange complex in an American wasteland; a relic high atop a mountain.

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.

Palmyra: pearl of the Syrian desert; experts return to the site and use CGI reconstruction to reveal the secrets of Palmyra's ancient engineers.

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.

A secret Russian military base in the Gobi Desert; a strange complex in an American wasteland; a relic high atop a mountain.

Graham's guests are Hollywood stars Reese Witherspoon and Will Ferrell, pop icon and actor Ariana Grande and British actor Don Gilet.

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

Sandi Toksvig organizes an omnishambles with Josh Widdicombe, Stephen K. Amos, Cally Beaton and Alan Davies.

Sandi Toksvig welcomes Jason Manford, Jimmy Carr, Victoria Coren Mitchell and Alan Davies to take a look at oddball games.

Graham's guests are Hollywood stars Reese Witherspoon and Will Ferrell, pop icon and actor Ariana Grande and British actor Don Gilet.

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

Sandi Toksvig organizes an omnishambles with Josh Widdicombe, Stephen K. Amos, Cally Beaton and Alan Davies.

Sandi Toksvig welcomes Jason Manford, Jimmy Carr, Victoria Coren Mitchell and Alan Davies to take a look at oddball games.

Pick through a dizzying array of questions and answers as Rick tries to separate the winners from the rest of the pack; cheer as one lucky contestant gets a chance to unleash a spectacular torrent of 10,000 one-pound coins.

A secret Russian military base in the Gobi Desert; a strange complex in an American wasteland; a relic high atop a mountain.

Palmyra: pearl of the Syrian desert; experts return to the site and use CGI reconstruction to reveal the secrets of Palmyra's ancient engineers.

Four junior bakers are left, but only one will rise to the occasion to be crowned champion in the Grand Final.

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

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

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 crossing over Canada's longest bridge in their vintage RV, enroute to Canada's smallest province, Prince Edward Island; their cross-country journey is just getting started.

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.

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.

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

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

Graham's guests are Hollywood stars Reese Witherspoon and Will Ferrell, pop icon and actor Ariana Grande and British actor Don Gilet.

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

Sandi Toksvig looks into occupations and offices with Deirdre O'Kane, Richard Osman, David Mitchell and Alan Davies.

Sandi Toksvig ventures overseas to find out about Allotment Annies with Bill Bailey, Colin Lane, Desiree Burch and Alan Davies.

Pick through a dizzying array of questions and answers as Rick tries to separate the winners from the rest of the pack; cheer as one lucky contestant gets a chance to unleash a spectacular torrent of 10,000 one-pound coins.

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.

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

Pick through a dizzying array of questions and answers as Rick tries to separate the winners from the rest of the pack; cheer as one lucky contestant gets a chance to unleash a spectacular torrent of 10,000 one-pound coins.

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

Share the terror as survivors relive the moment when these huge waves rushed in.

A deadly balloon bomb threatens the Manhattan Project during World War II; India is rocked by unexpected Himalayan floods outside monsoon season; a pandemic shuts down the world.

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

In Orange NSW, first responders Chris and Mel have found all the cosmopolitan comforts of city living along with fresh air, big skies, open spaces and a sweet Edwardian fixer-upper called Bega.

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.

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

Sandi Toksvig looks into occupations and offices with Deirdre O'Kane, Richard Osman, David Mitchell and Alan Davies.

Sandi Toksvig ventures overseas to find out about Allotment Annies with Bill Bailey, Colin Lane, Desiree Burch and Alan Davies.

Pick through a dizzying array of questions and answers as Rick tries to separate the winners from the rest of the pack; cheer as one lucky contestant gets a chance to unleash a spectacular torrent of 10,000 one-pound coins.

Sandi Toksvig looks into occupations and offices with Deirdre O'Kane, Richard Osman, David Mitchell and Alan Davies.

Sandi Toksvig ventures overseas to find out about Allotment Annies with Bill Bailey, Colin Lane, Desiree Burch and Alan Davies.

Discover the devastation snow can bring as a hurricane blizzard hits the eastern coast of Canada in 2020. Then glimpse its icy beauty in mesmerizing brinicles and snow flowers, and learn how artificial glaciers can be used to alleviate drought.

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.

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.

The coastal metropolis of Miami faces a triple threat of crumbling limestone bedrock, ferocious superstorms and relentless rising oceans.

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.

Leaders and representatives of Aboriginal communities show Zac and Darin how indigenous cultures live to protect and preserve the land.

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

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

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

In Orange NSW, first responders Chris and Mel have found all the cosmopolitan comforts of city living along with fresh air, big skies, open spaces and a sweet Edwardian fixer-upper called Bega.

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

Daylight returns to the Arctic, bringing new opportunities for residents.

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

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.

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.

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

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.

Leaders and representatives of Aboriginal communities show Zac and Darin how indigenous cultures live to protect and preserve the land.

Share the terror as survivors relive the moment when these huge waves rushed in.

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

Daylight returns to the Arctic, bringing new opportunities for residents.

A deadly balloon bomb threatens the Manhattan Project during World War II; India is rocked by unexpected Himalayan floods outside monsoon season; a pandemic shuts down the world.

Jon and his brother Lee search a vast expanse of tundra - on the hunt for a herd of muskox; Kim and Pierre head deep into the bush in an all-out effort to expand their Yukon trapline; Becky heads into the wilderness.

Dr. Cori sees Trooper the dog over several days to figure out why he won't eat and each day the stakes get higher; after a tricky eye surgery on Ben the dog, Dr. Allison heads to the bush with her mom for a dog sledding adventure.

A turtle named Knuckles needs help with some shell issues and a pig named Missy has a bad case of the flu.

A pregnant dog named Bella needs an emergency C-section before she loses her pup; a giant Tegus lizard is uncharacteristically lethargic; Dr. Savannah joins Dayle at the annual Drayton Valley Rodeo where Dayle is the vet on call.

A defenestrated kitty needs a new home, a cat named Bella has mouth issues which may or may not be cancer, and Dr. Savannah takes a trip to the Siksika first nation to run a spay/neuter clinic to help control the pet population.

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.

A father and son see mysterious lights near their property and call the sheriff's office; Six police cars try to chase down the object; A large craft covers a French town in an odd material.

Local authorities receive more than 50 UFO reports in the Chicago area on Halloween night, many record video of the bizarre lights; Multiple sightings of a large flying craft in Pennsylvania.

Dr. Cori sees Trooper the dog over several days to figure out why he won't eat and each day the stakes get higher; after a tricky eye surgery on Ben the dog, Dr. Allison heads to the bush with her mom for a dog sledding adventure.

Paid programming.

Preparations for Hope's open house are derailed when a patient goes missing; the event may be too successful for its own good.

The inspector missed something important when inspecting the fireplaces.

The Dendera Temple is one of the best-preserved temples in all of Egypt; experts decipher its mystifying zodiac images and uncover the ceremonial events that took place at this sacred site, and stunning CGI rebuilds this grand complex in its prime.

The secrets of a dilapidated concrete wall wedged perilously into the Italian mountains; peek at five eerie circular structures on a Cuban island; explore a former American escape route from nuclear Armageddon; a submerged link to D-Day.

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

The Dendera Temple is one of the best-preserved temples in all of Egypt; experts decipher its mystifying zodiac images and uncover the ceremonial events that took place at this sacred site, and stunning CGI rebuilds this grand complex in its prime.

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

The secrets of a dilapidated concrete wall wedged perilously into the Italian mountains; peek at five eerie circular structures on a Cuban island; explore a former American escape route from nuclear Armageddon; a submerged link to D-Day.

A deadly volcano eruption causes catasphrophic destruction, and a tornado flips cars on a highway.

On Aug. 17, 2020, a series of lightning strikes ignite multiple fires around Napa Valley; fanned by intense winds, the fires rapidly intensify into the LNU Fire Complex.

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

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

A deadly volcano eruption causes catasphrophic destruction, and a tornado flips cars on a highway.

On Aug. 17, 2020, a series of lightning strikes ignite multiple fires around Napa Valley; fanned by intense winds, the fires rapidly intensify into the LNU Fire Complex.

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

The secrets of a dilapidated concrete wall wedged perilously into the Italian mountains; peek at five eerie circular structures on a Cuban island; explore a former American escape route from nuclear Armageddon; a submerged link to D-Day.

The Dendera Temple is one of the best-preserved temples in all of Egypt; experts decipher its mystifying zodiac images and uncover the ceremonial events that took place at this sacred site, and stunning CGI rebuilds this grand complex in its prime.

Ten home potters from around the United Kingdom travel to Stoke-on-Trent, the home of British pottery, to take part in a competition to become top potter.

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.

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

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

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.

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.

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

A moose on the loose raises a ruckus; a permanent resident becomes a lovable nuisance.

Investigating a hidden reno that threatens a family's health and safety; Mike assesses Kris and Dave's basement playroom, where a closed-in cold cellar offers the perfect breeding ground for mould; the crew send this fungus packing.

The magnificent tomb of Alexander the Great mysteriously vanishes and becomes a legend; using CGI, investigators piece together the evidence to reveal where his tomb lies and what it might look like.

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.

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

The magnificent tomb of Alexander the Great mysteriously vanishes and becomes a legend; using CGI, investigators piece together the evidence to reveal where his tomb lies and what it might look like.

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

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.

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

Eshaan Akbar, Jo Brand and Jimmy Carr join Sandi and Alan for a festive special.

Aisling Bea, Urzila Carlson, and Romesh Ranganathan compete in this upside-down episode.

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

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.

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

Hunt for the root cause of atomic accidents; examine the Windscale fire, which led to safer reactor designs; learn why swift crisis management helped in the Three Mile Island incident; see why improper waste disposal fuelled the Kyshtym disaster.

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.

The magnificent tomb of Alexander the Great mysteriously vanishes and becomes a legend; using CGI, investigators piece together the evidence to reveal where his tomb lies and what it might look like.

Ten home potters from around the United Kingdom travel to Stoke-on-Trent, the home of British pottery, to take part in a competition to become top potter.

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.

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.

The small community of Montecito is hit by one disaster after another; eventually the land slides away from the hills and ten-ton boulders, 30 ft tall trees and millions of gallons of mud and water sweep down streets.

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.

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.

These are the witnesses that have been literally touched by the unknown; physical contact events that take the shape of nightmares, complete with alien examinations and inexplicable metal implants discovered inside human bodies.

The mercury drops, but things heat up for Hope; an elusive creature is caught on tape; an impaled gull inspires a dramatic rescue.

Tammy and Jason hire a contractor to build a cement staircase.

In 373 B.C., the Greek city of Helike vanished; archaeologists believe they've found the ruins of the great lost metropolis; using CGI, experts re-create the city's final moments and reveal its links to the greatest lost land of all - Atlantis.

Visiting a controversial natural oasis in upstate New York; spying on the classified remains of a cutting-edge government vehicle project in Colorado; exploring a doomed monument to hope in Memphis and a strange Pacific Northwest town with a secret.

Analyze fish remains found near an angry Sumatran volcano that could suggest a new human migration route. Visit a prehistoric village smoked out by a forest fire, a collapsed kingdom in Turkey, and evidence of early Olympic sacrificial rituals.

In 373 B.C., the Greek city of Helike vanished; archaeologists believe they've found the ruins of the great lost metropolis; using CGI, experts re-create the city's final moments and reveal its links to the greatest lost land of all - Atlantis.

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