A strange explosion and tower of fire in oil fields is not what it seems; the world's last mammoths are killed en masse; a U.S. nuclear sub goes missing.

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

Witness astonishing footage shot by members of the public.

Open burial sites filled with secrets. Find powerful artifacts in a French rulers tomb, see what a tomb adorned with conch shells says about sacred ceremonies, and expose complex beliefs about animals and the afterlife in an Egyptian zoo graveyard.

Examining extreme Cold War weapons and daring experiments with pressure and propulsion; discovering how these thrilling but dangerous innovations led to medical-imaging advances and unexpected consumer products, including 1991's hottest toy.

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

Explore rows of ceramic tombs in drought-stricken Iraq and wander through a prehistoric campsite found after a powerful storm blows through Alberta, Canada. Examine ancient coins in Pakistan and a Roman coastal town laid bare by a cliff collapse.

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

Survey a hurricane-flooded New York City and a molten Spanish volcano from above. Relive a tragic Italian cruise ship disaster caused by human error, then see how warming temperatures primed a Georgian mountainside for a lethal landslide.

A quiz which compensates for the level of difficulty by awarding points not just for correct answers but also for interesting answers, regardless of their relevance to the original question asked.

Paid programming.

Open burial sites filled with secrets. Find powerful artifacts in a French rulers tomb, see what a tomb adorned with conch shells says about sacred ceremonies, and expose complex beliefs about animals and the afterlife in an Egyptian zoo graveyard.

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

Scientists uncover salt chambers, bunkers, old kingdoms, and mysterious caves.

Explore rows of ceramic tombs in drought-stricken Iraq and wander through a prehistoric campsite found after a powerful storm blows through Alberta, Canada. Examine ancient coins in Pakistan and a Roman coastal town laid bare by a cliff collapse.

Billy Meier claims he's traveled through time and space with an alien race from the Pleiades star cluster; in the decades following his revelation, both skeptics and ufologists say it's a hoax despite Meier providing photographic evidence.

Witness astonishing footage shot by members of the public.

Alaskans make the most of the endless sun as the last of the snow melts.

Survey a hurricane-flooded New York City and a molten Spanish volcano from above. Relive a tragic Italian cruise ship disaster caused by human error, then see how warming temperatures primed a Georgian mountainside for a lethal landslide.

Track down forgotten ideas that have far-reaching consequences in the modern world. Look at a medieval steel formula that was accidentally rediscovered during the space race, then see what a lost nuclear formula had to do with an oil rig disaster.

Dive into Puerto Rico's coastal waters, where the team investigates a leaked video of a mysterious craft plunging into the ocean; going on a harrowing nighttime hunt to find out if tales of alien underwater bases are true or just a local myth.

Spring has arrived and the NWS Homesteaders face a whole new set of seasonal challenges.

Track down forgotten ideas that have far-reaching consequences in the modern world. Look at a medieval steel formula that was accidentally rediscovered during the space race, then see what a lost nuclear formula had to do with an oil rig disaster.

Dive into Puerto Rico's coastal waters, where the team investigates a leaked video of a mysterious craft plunging into the ocean; going on a harrowing nighttime hunt to find out if tales of alien underwater bases are true or just a local myth.

Spring has arrived and the NWS Homesteaders face a whole new set of seasonal challenges.

Survey a hurricane-flooded New York City and a molten Spanish volcano from above. Relive a tragic Italian cruise ship disaster caused by human error, then see how warming temperatures primed a Georgian mountainside for a lethal landslide.

Question whether Napoleon Bonaparte was poisoned in exile, then find out whose bones were buried underneath Benjamin Franklin's London home; analyze evidence that suggests that Grand Duchess Anastasia may have escaped the 1918 Romanov massacre.

Dive into Puerto Rico's coastal waters, where the team investigates a leaked video of a mysterious craft plunging into the ocean; going on a harrowing nighttime hunt to find out if tales of alien underwater bases are true or just a local myth.

A strange explosion and tower of fire in oil fields is not what it seems; the world's last mammoths are killed en masse; a U.S. nuclear sub goes missing.

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.

Track down forgotten ideas that have far-reaching consequences in the modern world. Look at a medieval steel formula that was accidentally rediscovered during the space race, then see what a lost nuclear formula had to do with an oil rig disaster.

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

A volcanic island off the coast of Antarctica with a mysterious past; the mummified remains of a teenage girl in the Peruvian Andes; a shipwreck is found near Russia's Franz Josef Archipelago; strange holes appearing in snow in Japan.

Puzzling over history-making structures and artifacts; Searching for clues about civilization's origins in Göbekli Tepe, visiting a German statue that reveals symbolic thought; witnessing the brutality of colonization in a Mexican skull tower.

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

Paid programming.

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.

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

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

Two devastating earthquakes hit Mexico in quick succession; a maverick traveler sees a volcano blow up in his face in Guatemala; a storm junkie risks his neck.

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

A volcanic island off the coast of Antarctica with a mysterious past; the mummified remains of a teenage girl in the Peruvian Andes; a shipwreck is found near Russia's Franz Josef Archipelago; strange holes appearing in snow in Japan.

The investigation of some of the most notorious and mysterious events, in an attempt to unravel all the possible reasons for the disasters.

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

Investigate an invisible Everest pressure wave, a poisonous Sri Lankan shipwreck, and devastating twin earthquakes in Turkey. Marvel at a flooded Spanish town where modern infrastructure failed, but an ancient Roman dam saved the day.

Storms and disasters uncover a shipwreck, megalith, ancient ruins, and petroglyphs.

Elevated highways fall, a bridge collapses, and houses plunge into the ocean.

Investigate an invisible Everest pressure wave, a poisonous Sri Lankan shipwreck, and devastating twin earthquakes in Turkey. Marvel at a flooded Spanish town where modern infrastructure failed, but an ancient Roman dam saved the day.

Storms and disasters uncover a shipwreck, megalith, ancient ruins, and petroglyphs.

Experts examine how engineering failures allowed Hurricane Katrina to devastate New Orleans and cause the collapse of the Tacoma Narrows Bridge.

Two devastating earthquakes hit Mexico in quick succession; a maverick traveler sees a volcano blow up in his face in Guatemala; a storm junkie risks his neck.

The investigation of some of the most notorious and mysterious events, in an attempt to unravel all the possible reasons for the disasters.

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

Investigating notable UFO and extraterrestrial cases from the past 75 years, applying analytical techniques to examine the historical context and evidence behind these unexplained phenomena.

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.

Spring has arrived and the NWS Homesteaders face a whole new set of seasonal challenges.

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

Mysterious industrial waste and abandoned homes in an uninhabited part of Greenland; strange ditches and mounds deep within the Arctic Circle; a huge pyramid on the Kazakh steppe; a ball of golden fur in Yukon's gold fields.

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

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

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

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

Hurricanes, droughts and storms reveal strange mysteries, relics and artifacts.

A rare tornado decimates a small town in rural Uruguay, snaring a man in his car and obliterating a huge warehouse; a thrill seeker fulfills his ambition to reach the world's largest lava lake.

Explore a Louisiana military base that helped save the world, then descend into a basement filled with Prohibition-era secrets; look around a bizarre castle in the Colorado mountains and a ruined Pennsylvania resort that was a Union stronghold.

Mysterious industrial waste and abandoned homes in an uninhabited part of Greenland; strange ditches and mounds deep within the Arctic Circle; a huge pyramid on the Kazakh steppe; a ball of golden fur in Yukon's gold fields.

The investigation of some of the most notorious and mysterious events, in an attempt to unravel all the possible reasons for the disasters.

Explore a Louisiana military base that helped save the world, then descend into a basement filled with Prohibition-era secrets; look around a bizarre castle in the Colorado mountains and a ruined Pennsylvania resort that was a Union stronghold.

The most captivating tournament in puppy sports continues as we get ready for Games 3 and 4 of the quarter-finals. See which team gets one cuddle closer to becoming top dog and winning the prestigious World Pup Cup.

Battle teen anxiety with rescue dog Frank and look before you leap with bulldog Max.

The five-month assessment looms, and the handlers struggle to dedicate focused time to their pups; some trainers stumble while others leap through the tasks; the pups and trainers have a long road ahead of them.

Battle teen anxiety with rescue Frank and look before you leap with bulldog Max.

Facing off with an inflamed horse knee; a possum infection; a kitty baby boom.

The most captivating tournament in puppy sports continues as we get ready for Games 3 and 4 of the quarter-finals. See which team gets one cuddle closer to becoming top dog and winning the prestigious World Pup Cup.

Battle teen anxiety with rescue dog Frank and look before you leap with bulldog Max.

The five-month assessment looms, and the handlers struggle to dedicate focused time to their pups; some trainers stumble while others leap through the tasks; the pups and trainers have a long road ahead of them.

Battle teen anxiety with rescue Frank and look before you leap with bulldog Max.

Facing off with an inflamed horse knee; a possum infection; a kitty baby boom.

A rare tornado decimates a small town in rural Uruguay, snaring a man in his car and obliterating a huge warehouse; a thrill seeker fulfills his ambition to reach the world's largest lava lake.

The investigation of some of the most notorious and mysterious events, in an attempt to unravel all the possible reasons for the disasters.

Explore a Louisiana military base that helped save the world, then descend into a basement filled with Prohibition-era secrets; look around a bizarre castle in the Colorado mountains and a ruined Pennsylvania resort that was a Union stronghold.

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

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.

Joining the manhunt for three inmates who escaped Alcatraz in 1962; following the trail of pirate Henry Avery after he pulled off a massive heist in 1695, then stalking Axeman of New Orleans, a serial killer who taunted police but spared jazz lovers.

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

A Kazakh farmer discovers ancient burial sites related to the legend of the Amazon women warriors; a military structure in the Italian Alps; a shrine in the Indian Himalayas; a fossilized species.

Investigating notable UFO and extraterrestrial cases from the past 75 years, applying analytical techniques to examine the historical context and evidence behind these unexplained phenomena.

Paid programming.

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

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.

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

Earthquakes, droughts and collapsing dams expose artifacts and graves.

In South Africa, the Cape is struck by both a violent storm and catastrophic wildfires that overwhelm the emergency services.

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.

A Kazakh farmer discovers ancient burial sites related to the legend of the Amazon women warriors; a military structure in the Italian Alps; a shrine in the Indian Himalayas; a fossilized species.

The investigation of some of the most notorious and mysterious events, in an attempt to unravel all the possible reasons for the disasters.

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.

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.

Archaeologists find a tomb, a haunting cave, and a sophisticated labyrinth.

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.

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.

Archaeologists find a tomb, a haunting cave, and a sophisticated labyrinth.

Track down forgotten ideas that have far-reaching consequences in the modern world. Look at a medieval steel formula that was accidentally rediscovered during the space race, then see what a lost nuclear formula had to do with an oil rig disaster.

In South Africa, the Cape is struck by both a violent storm and catastrophic wildfires that overwhelm the emergency services.

The investigation of some of the most notorious and mysterious events, in an attempt to unravel all the possible reasons for the disasters.

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.

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.

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.

Puzzling over history-making structures and artifacts; Searching for clues about civilization's origins in Göbekli Tepe, visiting a German statue that reveals symbolic thought; witnessing the brutality of colonization in a Mexican skull tower.

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.

A secret military base around the North Pole; a man-made, ancient stone formation below the surface of Lake Huron; a 1500-year-old burial ground on the shores of the Baltic Sea; a life form in the permafrost in Russia's far east.

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

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

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

A 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.

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 hiker in a remote Canadian wilderness clings on for dear life as a glacial melt flash flood threatens to sweep him away.

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

A secret military base around the North Pole; a man-made, ancient stone formation below the surface of Lake Huron; a 1500-year-old burial ground on the shores of the Baltic Sea; a life form in the permafrost in Russia's far east.

A thousand-year-old Italian tower is brought to the brink of collapse; a Viking stronghold in Greenland, inexplicably abandoned; the ghost WWII bomber that vanishes on its return to base.

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

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

Motorcyclists film a bizarre, elongated humanoid creature walking along a road in Jharkhand, India; experts investigate the violent history behind an organized cult of professional robbers and murderers who targeted unsuspecting travelers.

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

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

Motorcyclists film a bizarre, elongated humanoid creature walking along a road in Jharkhand, India; experts investigate the violent history behind an organized cult of professional robbers and murderers who targeted unsuspecting travelers.

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

A hiker in a remote Canadian wilderness clings on for dear life as a glacial melt flash flood threatens to sweep him away.

A thousand-year-old Italian tower is brought to the brink of collapse; a Viking stronghold in Greenland, inexplicably abandoned; the ghost WWII bomber that vanishes on its return to base.

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

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.

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

The five-month assessment looms, and the handlers struggle to dedicate focused time to their pups; some trainers stumble while others leap through the tasks; the pups and trainers have a long road ahead of them.

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 rumored nuclear lab buried in Australia; a hush-hush surprise underneath Alcatraz.

A giant naval vessel on the bottom of the Norwegian Sea; an ancient reptile-like creature unknown to science in the permafrost of Canada's Arctic; a figure-eight-shaped ditch in Scotland; an Antarctic research base surrounded by blood-soaked snow.

Experts examine how engineering failures allowed Hurricane Katrina to devastate New Orleans and cause the collapse of the Tacoma Narrows Bridge.

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

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

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 rumored nuclear lab buried in Australia; a hush-hush surprise underneath Alcatraz.

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 bomb cyclone detonates across northeast America.

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

A giant naval vessel on the bottom of the Norwegian Sea; an ancient reptile-like creature unknown to science in the permafrost of Canada's Arctic; a figure-eight-shaped ditch in Scotland; an Antarctic research base surrounded by blood-soaked snow.

Catastrophe strikes a crucial allied air supply route in WWII as 15 planes never return; London's River Thames ices up so much, a fair is held on it; a mission to the Moon narrowly avoids disaster.

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

Halle Berry, Chris Hemsworth, Rachel McAdams and John Bishop join Graham on his couch; Jessie Ware performs a single.

Footage filmed by members of the public and captured by security cameras, featuring interviews with victims and eyewitnesses of vehicular incidents and people fighting back against criminal activity.

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

Halle Berry, Chris Hemsworth, Rachel McAdams and John Bishop join Graham on his couch; Jessie Ware performs a single.

Footage filmed by members of the public and captured by security cameras, featuring interviews with victims and eyewitnesses of vehicular incidents and people fighting back against criminal activity.

Sandi Toksvig looks at quirky questions with Alan Davies, Loyiso Gola, Jason Manford and Sarah Millican.

Sandi Toksvig delves into a bit of quintessential "QI" with Alan Davies, Cariad Lloyd, Holly Walsh and Josh Widdicombe.

A bomb cyclone detonates across northeast America.

Catastrophe strikes a crucial allied air supply route in WWII as 15 planes never return; London's River Thames ices up so much, a fair is held on it; a mission to the Moon narrowly avoids disaster.

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

Joining the manhunt for three inmates who escaped Alcatraz in 1962; following the trail of pirate Henry Avery after he pulled off a massive heist in 1695, then stalking Axeman of New Orleans, a serial killer who taunted police but spared jazz lovers.

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

Puzzling over history-making structures and artifacts; Searching for clues about civilization's origins in Göbekli Tepe, visiting a German statue that reveals symbolic thought; witnessing the brutality of colonization in a Mexican skull tower.

Joining the manhunt for three inmates who escaped Alcatraz in 1962; following the trail of pirate Henry Avery after he pulled off a massive heist in 1695, then stalking Axeman of New Orleans, a serial killer who taunted police but spared jazz lovers.

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.

Elevated highways fall, a bridge collapses, and houses plunge into the ocean.

Sandi Toksvig looks at quirky questions with Alan Davies, Loyiso Gola, Jason Manford and Sarah Millican.

Paid programming.

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

It's Ian's first day as director of integrity, and his first challenge is to decide which cities should host the semi-finals; it's also Miami Day, which may or may not be a Thing.

A new environmental report on global heating causes temperatures to rise in the Oversight Team as they try to find ways to combat not only the report but global heating itself.

With the announcement of the new tournament ambassador imminent, the Oversight Team finalizes their logistics for the unveiling, but it seems Zurich may have plans of their own.

Sarah's wooden condoms gaffe has gone viral at the same time as rumors about a high-profile footballer demand an immediate response; can the team rise to both challenges?

The official unveiling of the new tournament football hits trouble when an online conspiracist makes incendiary claims about the dangers of the ball's advanced new technology.

A boycott and politics threaten the opening ceremony after a visit from its creative director; it's time for Ian to think about life after football.

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

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

Storms and disasters uncover a shipwreck, megalith, ancient ruins, and petroglyphs.

Halle Berry, Chris Hemsworth, Rachel McAdams and John Bishop join Graham on his couch; Jessie Ware performs a single.

Footage filmed by members of the public and captured by security cameras, featuring interviews with victims and eyewitnesses of vehicular incidents and people fighting back against criminal activity.

Sandi Toksvig looks at quirky questions with Alan Davies, Loyiso Gola, Jason Manford and Sarah Millican.

Sandi Toksvig delves into a bit of quintessential "QI" with Alan Davies, Cariad Lloyd, Holly Walsh and Josh Widdicombe.

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.

Archaeologists find a tomb, a haunting cave, and a sophisticated labyrinth.

Investigate an invisible Everest pressure wave, a poisonous Sri Lankan shipwreck, and devastating twin earthquakes in Turkey. Marvel at a flooded Spanish town where modern infrastructure failed, but an ancient Roman dam saved the day.

Storms and disasters uncover a shipwreck, megalith, ancient ruins, and petroglyphs.

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.

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

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

Puzzling over history-making structures and artifacts; Searching for clues about civilization's origins in Göbekli Tepe, visiting a German statue that reveals symbolic thought; witnessing the brutality of colonization in a Mexican skull tower.

It's Ian's first day as director of integrity, and his first challenge is to decide which cities should host the semi-finals; it's also Miami Day, which may or may not be a Thing.

A new environmental report on global heating causes temperatures to rise in the Oversight Team as they try to find ways to combat not only the report but global heating itself.

With the announcement of the new tournament ambassador imminent, the Oversight Team finalizes their logistics for the unveiling, but it seems Zurich may have plans of their own.

Sarah's wooden condoms gaffe has gone viral at the same time as rumors about a high-profile footballer demand an immediate response; can the team rise to both challenges?

The official unveiling of the new tournament football hits trouble when an online conspiracist makes incendiary claims about the dangers of the ball's advanced new technology.

A boycott and politics threaten the opening ceremony after a visit from its creative director; it's time for Ian to think about life after football.

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

The failed controlled demolition of The Clarion hotel in Las Vegas; substandard soil conditions and reclaimed land are among the reasons for construction site collapses; how construction, urbanization and heavy equipment contribute to sinkholes.

Sandi Toksvig delves into a bit of quintessential "QI" with Alan Davies, Cariad Lloyd, Holly Walsh and Josh Widdicombe.

Paid programming.

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

Sandi Toksvig considers pain and punishment with Jimmy Carr, Lee Mack, Alice Levine and Alan Davies.

Sandi Toksvig looks at a potpourri of topics with Phill Jupitus, Cally Beaton, Rhod Gilbert and Alan Davies.

Sandi Toksvig finally gets around to a bit of procrastination with Aisling Bea, Holly Walsh, Nikki Bedi and Alan Davies.

Sandi Toksvig considers various phenomena with Alan Davies, Josh Widdicombe, Cariad Lloyd and Paul Sinha.

It's Ian's first day as director of integrity, and his first challenge is to decide which cities should host the semi-finals; it's also Miami Day, which may or may not be a Thing.

A new environmental report on global heating causes temperatures to rise in the Oversight Team as they try to find ways to combat not only the report but global heating itself.

With the announcement of the new tournament ambassador imminent, the Oversight Team finalizes their logistics for the unveiling, but it seems Zurich may have plans of their own.

Sarah's wooden condoms gaffe has gone viral at the same time as rumors about a high-profile footballer demand an immediate response; can the team rise to both challenges?

The official unveiling of the new tournament football hits trouble when an online conspiracist makes incendiary claims about the dangers of the ball's advanced new technology.

A boycott and politics threaten the opening ceremony after a visit from its creative director; it's time for Ian to think about life after football.

Game 1 features Mexico taking on South Korea, followed by Game 2 with the USA versus England.

A World Cup-style tournament featuring 48 adoptable rescue puppies representing eight national teams competing for the World Pup Trophy. With "Rufferee" Jimmy Conrad and commentary from dog influencers Chili and Lumi.

The most captivating tournament in puppy sports continues as we get ready for Games 3 and 4 of the quarter-finals. See which team gets one cuddle closer to becoming top dog and winning the prestigious World Pup Cup.

The most captivating tournament in puppy sports continues as we get ready for Games 3 and 4 of the quarter-finals. See which team gets one cuddle closer to becoming top dog and winning the prestigious World Pup Cup.

It's Ian's first day as director of integrity, and his first challenge is to decide which cities should host the semi-finals; it's also Miami Day, which may or may not be a Thing.

A new environmental report on global heating causes temperatures to rise in the Oversight Team as they try to find ways to combat not only the report but global heating itself.

With the announcement of the new tournament ambassador imminent, the Oversight Team finalizes their logistics for the unveiling, but it seems Zurich may have plans of their own.

Sarah's wooden condoms gaffe has gone viral at the same time as rumors about a high-profile footballer demand an immediate response; can the team rise to both challenges?

The official unveiling of the new tournament football hits trouble when an online conspiracist makes incendiary claims about the dangers of the ball's advanced new technology.

A boycott and politics threaten the opening ceremony after a visit from its creative director; it's time for Ian to think about life after football.

Sandi Toksvig considers pain and punishment with Jimmy Carr, Lee Mack, Alice Levine and Alan Davies.

Sign off.

Sandi Toksvig finally gets around to a bit of procrastination with Aisling Bea, Holly Walsh, Nikki Bedi and Alan Davies.

Sandi Toksvig considers various phenomena with Alan Davies, Josh Widdicombe, Cariad Lloyd and Paul Sinha.

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.

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

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

Sandi Toksvig considers pain and punishment with Jimmy Carr, Lee Mack, Alice Levine and Alan Davies.

Sandi Toksvig looks at a potpourri of topics with Phill Jupitus, Cally Beaton, Rhod Gilbert and Alan Davies.

Sandi Toksvig finally gets around to a bit of procrastination with Aisling Bea, Holly Walsh, Nikki Bedi and Alan Davies.

Sandi Toksvig considers various phenomena with Alan Davies, Josh Widdicombe, Cariad Lloyd and Paul Sinha.

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.

Tracking down forgotten ideas that have far-reaching consequences in the modern world; looking at a medieval steel formula that was accidentally rediscovered during the space race; seeing what a lost nuclear formula had to do with an oil rig disaster.

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.

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

Learning how displaced artifacts spark fresh investigations and rewrite timelines; unearthing a forgotten tragedy in a remote mountain lake in India, checking out footprints that change human migration stories; reopening an ancient cold case.

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.

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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.

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.

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.

Fight an inferno of wildfire with a small village and rescue vacationers from a burning shore in Portugal. Survive a mudslide in the Mojave Desert, flee a waterspout with tourists in North Carolina and watch dramatic rescues from floods in Australia.

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

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

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

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

Look down at the Fukushima nuclear crisis and an erupting Indonesian mud volcano. Follow an explosive swarm of American tornadoes, then track the global supply chain chaos that ensued when a megaship wedged itself sideways in the Suez Canal.

Investigate an Aztec serpent carving that emerges after a Mexico City quake, then ponder the origins of a skeletal ship washed up by a typhoon in Vietnam. Ponder hunter-gatherer life in Louisiana and survey a fleet of sunken Nazi ships in the Danube.

Examine a condo collapse, India's dam distress and an aircraft's unwanted air.

Look down at the Fukushima nuclear crisis and an erupting Indonesian mud volcano. Follow an explosive swarm of American tornadoes, then track the global supply chain chaos that ensued when a megaship wedged itself sideways in the Suez Canal.

Investigate an Aztec serpent carving that emerges after a Mexico City quake, then ponder the origins of a skeletal ship washed up by a typhoon in Vietnam. Ponder hunter-gatherer life in Louisiana and survey a fleet of sunken Nazi ships in the Danube.

Experts examine the devastating collapse of the Rana Plaza factory in Bangladesh and of the Morandi bridge in Genoa, Italy; investigating how the disasters could have been avoided.

Fight an inferno of wildfire with a small village and rescue vacationers from a burning shore in Portugal. Survive a mudslide in the Mojave Desert, flee a waterspout with tourists in North Carolina and watch dramatic rescues from floods in Australia.

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

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

In 1980, a UFO detected on military radar, lands near crucial NATO bases; a group of military personnel claim to have seen a shiny metallic object with colored lights and hieroglyphic inscriptions.

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.

Spring has arrived and the NWS Homesteaders face a whole new set of seasonal challenges.

Parting the waters using satellite imagery to see what lies beneath; discovering a lost-lost Turkish basilica, a church spire amid toxic sludge in Romania, a ship hull in the North Sea, a shocking underwater find that rivals the Great Barrier Reef.

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

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.

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

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.

Parting the waters using satellite imagery to see what lies beneath; discovering a lost-lost Turkish basilica, a church spire amid toxic sludge in Romania, a ship hull in the North Sea, a shocking underwater find that rivals the Great Barrier Reef.

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.

A holiday cruise ship sails into a hurricane, terrifying 4,000 passengers as their cabins are plunged underwater.

A porn baron establishes a hedonistic paradise in hopes of averting nuclear catastrophe - attracting rich and infamous clients in the process.

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

When Pompeii was destroyed by an apocalyptic volcano in 79 AD, another Roman town was destroyed as well; experts use cutting-edge tech to investigate the secrets of Vesuvius' second victim.

A porn baron establishes a hedonistic paradise in hopes of averting nuclear catastrophe - attracting rich and infamous clients in the process.