Crawl through a notorious brick-lined tunnel system in a historic Florida neighbourhood. Open a window into the lives of elite Greek families in Naples, explore a three-story underground city in Iran, and find 2nd-century barracks buried in Rome.

Guest comic Tiffany Coyne.

Guest comic Tiffany Haddish.

Heavy snow creates a treacherous situation for trekkers in the Himalayan mountains, when an earthquake-triggered avalanche sweeps into a busy base camp; in Australia, category three Cyclone Damien makes landfall and leaves a trail of destruction.

Touring a South Korean mountainside retreat built in the shadow of a frozen conflict; exploring a shrine to Soviet political manipulation; checking out a recently declassified Spanish defence network; peeking inside an Argentinian guest house.

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

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.

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.

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

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.

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.

Visitations that leave behind objects or witnesses give us fascinating evidence.

Rivals try to avoid a one-way ticket to elimination.

Guest comic Kaila Mullady.

Guest comic Mark Ballas.

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

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.

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

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.

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.

Guest comic Kaila Mullady.

Guest comic Mark Ballas.

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.

Archaeologists in Russia unearth many mass graves; a World War II American military plane on a Canadian mountain; strange cosmic rays coming from Antarctica's ice; in Russia, researchers investigate a phenomenon involving glowing snow.

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

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

Archaeologists in Russia unearth many mass graves; a World War II American military plane on a Canadian mountain; strange cosmic rays coming from Antarctica's ice; in Russia, researchers investigate a phenomenon involving glowing snow.

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

Guest comic Kaila Mullady.

Guest comic Mark Ballas.

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

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

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.

Visitations that leave behind objects or witnesses give us fascinating evidence.

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.

Dr. Ricky Allen has now been on the run for 15 days and the hunters are getting frustrated; Peter Bleksley launches a concerted media campaign to flush Ricky out.

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.

A new theory about the sinking of the Titanic emerges; a treeless circle in the middle of the woods is probed; a formation of giant whale bones is discovered sticking out of the ground; researchers study the loudest sound ever recorded underwater.

As daylight fades, Alaskans contend with threats lurking in the shadows.

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.

Guest comic Mark Ballas.

Guest comic Gary Anthony Williams.

On a picturesque island off the coast of Brazil, this penal colony was once the site of a dramatic prisoner uprising; among the ruins lies the story of the violent rebellion and the recapturing of the island by military forces.

A Montana small town branded by an infamous jailbreak; how nature trumped greed during an Alaska treasure hunt; a cultural icon from the rough side of New Orleans; the Empire State of the South.

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

A new theory about the sinking of the Titanic emerges; a treeless circle in the middle of the woods is probed; a formation of giant whale bones is discovered sticking out of the ground; researchers study the loudest sound ever recorded underwater.

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.

Guest comic Greg Proops.

Games include: Questions, Doo Wop, Dubbing, Scenes from a hat, Helping hands.

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.

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

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

Using canal towpaths, Stephen Hardiker and Martin Cole make their escape and travel almost 100 miles to a caravan in Wales.

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

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

Using canal towpaths, Stephen Hardiker and Martin Cole make their escape and travel almost 100 miles to a caravan in Wales.

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

On a picturesque island off the coast of Brazil, this penal colony was once the site of a dramatic prisoner uprising; among the ruins lies the story of the violent rebellion and the recapturing of the island by military forces.

Crawl through a notorious brick-lined tunnel system in a historic Florida neighbourhood. Open a window into the lives of elite Greek families in Naples, explore a three-story underground city in Iran, and find 2nd-century barracks buried in Rome.

A twisting swarm of menacing aerial creatures glides above the suburbs; bizarrely parting seas suggest connections to ancient legends; a volcano produces deadly hair-like fibers.

From Sydney to the Greater Blue Mountains, Zach and Darin meet with leading eco-warriors to learn about protected lands and habitat conservation.

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

Experts investigate a fiery overpass collapse in Philadelphia, a plummeting radio telescope and a building collapse crisis in Nigeria.

Archaeologists in Russia unearth many mass graves; a World War II American military plane on a Canadian mountain; strange cosmic rays coming from Antarctica's ice; in Russia, researchers investigate a phenomenon involving glowing snow.

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.

Guest comic Tiffany Coyne.

Guest comic Tiffany Haddish.

A scruffy superhero named Hancock (Will Smith) protects the citizens of Los Angeles but leaves horrendous collateral damage in the wake of every well-intentioned feat. That's OK with Hancock; he doesn't care what people think and is just as likely to be found dozing on a park bench as saving a damsel in distress. However, after saving the life of a PR executive (Jason Bateman) and meeting the man's beautiful wife (Charlize Theron), he realizes that he may have a sensitive side after all.

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

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

Sandi Toksvig takes a QI look at some vets with Tom Allen, Melanie Bracewell, Desiree Burch and Alan Davies.

Sandi Toksvig is joined by Maisie Adam, Jack Dee, Kiri Pritchard-McLean and Alan Davies.

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.

Players who think they know how to unlock a big payout.

Sandi Toksvig takes a QI look at some vets with Tom Allen, Melanie Bracewell, Desiree Burch and Alan Davies.

Sandi Toksvig is joined by Maisie Adam, Jack Dee, Kiri Pritchard-McLean and Alan Davies.

Crawl through a notorious brick-lined tunnel system in a historic Florida neighbourhood. Open a window into the lives of elite Greek families in Naples, explore a three-story underground city in Iran, and find 2nd-century barracks buried in Rome.

A scruffy superhero named Hancock (Will Smith) protects the citizens of Los Angeles but leaves horrendous collateral damage in the wake of every well-intentioned feat. That's OK with Hancock; he doesn't care what people think and is just as likely to be found dozing on a park bench as saving a damsel in distress. However, after saving the life of a PR executive (Jason Bateman) and meeting the man's beautiful wife (Charlize Theron), he realizes that he may have a sensitive side after all.

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

Archaeologists in Russia unearth many mass graves; a World War II American military plane on a Canadian mountain; strange cosmic rays coming from Antarctica's ice; in Russia, researchers investigate a phenomenon involving glowing snow.

Crawl through a notorious brick-lined tunnel system in a historic Florida neighbourhood. Open a window into the lives of elite Greek families in Naples, explore a three-story underground city in Iran, and find 2nd-century barracks buried in Rome.

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

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

Experts investigate a fiery overpass collapse in Philadelphia, a plummeting radio telescope and a building collapse crisis in Nigeria.

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.

Category 4 Hurricane Laura batters Cameron, La.; its wicked winds and torrential rains reach inland to Lake Charles, La.; residents take cover as their windows break, the power goes out and storm surge takes over.

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.

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

A scruffy superhero named Hancock (Will Smith) protects the citizens of Los Angeles but leaves horrendous collateral damage in the wake of every well-intentioned feat. That's OK with Hancock; he doesn't care what people think and is just as likely to be found dozing on a park bench as saving a damsel in distress. However, after saving the life of a PR executive (Jason Bateman) and meeting the man's beautiful wife (Charlize Theron), he realizes that he may have a sensitive side after all.

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

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.

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

Guest comic Kaila Mullady.

Guest comic Mark Ballas.

Using canal towpaths, Stephen Hardiker and Martin Cole make their escape and travel almost 100 miles to a caravan in Wales.

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

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

As daylight fades, Alaskans contend with threats lurking in the shadows.

Using canal towpaths, Stephen Hardiker and Martin Cole make their escape and travel almost 100 miles to a caravan in Wales.

A London tunnel complex from World War II and a New Jersey aviation disaster site are explored; the tour includes a former English industrial center and an Italian forest with unmarked graves.

U.S. Navy veteran turned private investigator Jennifer Marshall and journalist Ozzy Mora investigate chilling claims and a mysterious death at the infamous Cecil Hotel in Los Angeles.

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

A London tunnel complex from World War II and a New Jersey aviation disaster site are explored; the tour includes a former English industrial center and an Italian forest with unmarked graves.

U.S. Navy veteran turned private investigator Jennifer Marshall and journalist Ozzy Mora investigate chilling claims and a mysterious death at the infamous Cecil Hotel in Los Angeles.

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

As daylight fades, Alaskans contend with threats lurking in the shadows.

Using canal towpaths, Stephen Hardiker and Martin Cole make their escape and travel almost 100 miles to a caravan in Wales.

U.S. Navy veteran turned private investigator Jennifer Marshall and journalist Ozzy Mora investigate chilling claims and a mysterious death at the infamous Cecil Hotel in Los Angeles.

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

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.

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.

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.

Archaeologists discover an unusual man-made rock formation in the remote Altai Mountains of Russia, and conducting a further excavation, they unearth an ancient log cabin and the mummified remains of two bodies buried deep in the frozen permafrost.

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

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.

Guest comic Tiffany Coyne.

Guest comic Jordin Sparks.

Viewing the remains of a castle-like ruin near Manhattan and a Japanese military stronghold built in response to U.S. gunboat diplomacy; paddling around a beautiful bay that hides a vast mountain complex; pondering the ruins of a decoding landmark.

A castle-like building in Washington State that fueled an American treasure hunt; the Southern US site of a murder that ushered in a new era; exploration of an unlikely beacon of progress in a rough Wyoming mining town.

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

Archaeologists discover an unusual man-made rock formation in the remote Altai Mountains of Russia, and conducting a further excavation, they unearth an ancient log cabin and the mummified remains of two bodies buried deep in the frozen permafrost.

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.

Guest comic Tiffany Coyne.

Guest comic Jordin Sparks.

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.

Experts investigate the factors behind the failure of the Space Shuttle Columbia and the critical mistake that led to a deadly stage collapse.

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

Hurricane Ida's rapid flooding traps people in their cars; a couple escapes a California inferno; a British adventurer outsmarts hungry wolves after being buried alive by an Arctic blizzard.

Experts investigate the factors behind the failure of the Space Shuttle Columbia and the critical mistake that led to a deadly stage collapse.

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

Guest comic Tiffany Coyne.

Guest comic Jordin Sparks.

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

Viewing the remains of a castle-like ruin near Manhattan and a Japanese military stronghold built in response to U.S. gunboat diplomacy; paddling around a beautiful bay that hides a vast mountain complex; pondering the ruins of a decoding landmark.

Archaeologists discover an unusual man-made rock formation in the remote Altai Mountains of Russia, and conducting a further excavation, they unearth an ancient log cabin and the mummified remains of two bodies buried deep in the frozen permafrost.

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.

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.

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

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.

Archaeologists discover human remains during an excavation of a fifth-century fort on the Swedish island of Oland; after further investigation, experts unearth 26 skeletons and uncover the site of an ancient massacre.

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.

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.

Guest comic Maile Brady.

Guest comic Jeff Davis.

A teenage girl in Korea is martyred in prison and becomes a national hero; the facility where she was held stands in remembrance of her bravery and the Korean struggle for independence.

A labor strike in an Arizona mining town ends in a mass kidnapping and deportation; a unique homesteading community gets its start in the Old West; a leaning Carolina lighthouse becomes part of Civil War history.

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

Archaeologists discover human remains during an excavation of a fifth-century fort on the Swedish island of Oland; after further investigation, experts unearth 26 skeletons and uncover the site of an ancient massacre.

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.

Guest comic Maile Brady.

Guest comic Jeff Davis.

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.

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

Aisling Bea, Mark Watson and Michelle Wolf join Sandi Toksvig and Alan Davis for a volatile episode.

Using canal towpaths, Stephen Hardiker and Martin Cole make their escape and travel almost 100 miles to a caravan in Wales.

Alaskans face long days and uncertain outcomes during trapping season.

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

Sandi Toksvig takes a look at some visionaries with Cally Beaton, Nish Kumar, Laura Smyth and Alan Davies.

Using canal towpaths, Stephen Hardiker and Martin Cole make their escape and travel almost 100 miles to a caravan in Wales.

Guest comic Maile Brady.

Guest comic Jeff Davis.

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

A teenage girl in Korea is martyred in prison and becomes a national hero; the facility where she was held stands in remembrance of her bravery and the Korean struggle for independence.

Archaeologists discover human remains during an excavation of a fifth-century fort on the Swedish island of Oland; after further investigation, experts unearth 26 skeletons and uncover the site of an ancient massacre.

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.

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.

On Aug. 10, 2020, hurricane-force winds blast through Iowa battering the city of Cedar Rapids; this rare Derecho packing powerful straight line winds takes the city by surprise and leaves behind a trail of destruction.

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.

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.

Games include: Questions, Doo Wop, Dubbing, Scenes from a hat, Helping hands.

Guest comic Greg Proops.

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.

Flee to an aviator's secluded Wyoming retreat away from the limelight and feel the weight of history in a famous Southern barbershop. Pop into a Connecticut building founded on regional rivalry and scratch your head at the Coney Island of the South.

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

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.

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.

Games include: Questions, Doo Wop, Dubbing, Scenes from a hat, Helping hands.

Guest comic Greg Proops.

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.

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

Explore a labyrinth built beneath Washington, D.C., by an eccentric entomologist. Admire a fresco-filled Roman mausoleum, spot intricate chambers carved into Colombia's volcanic rock, and see a sprawling network of hand-dug tunnels in Liverpool.

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.

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

Explore a labyrinth built beneath Washington, D.C., by an eccentric entomologist. Admire a fresco-filled Roman mausoleum, spot intricate chambers carved into Colombia's volcanic rock, and see a sprawling network of hand-dug tunnels in Liverpool.

Games include: Questions, Doo Wop, Dubbing, Scenes from a hat, Helping hands.

Guest comic Greg Proops.

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

A 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.

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.

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

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

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

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

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

Look inside homes that push the limits of design under this island's extreme conditions; ramble through a modernized courtyard, a house based on a love of circles, and an open-plan sculptural marvel inspired by the harsh, weather-beaten coastline.

Look inside homes that push the limits of design under this island's extreme conditions; ramble through a modernized courtyard, a house based on a love of circles, and an open-plan sculptural marvel inspired by the harsh, weather-beaten coastline.

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

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

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

Look inside homes that push the limits of design under this island's extreme conditions; ramble through a modernized courtyard, a house based on a love of circles, and an open-plan sculptural marvel inspired by the harsh, weather-beaten coastline.

Look inside homes that push the limits of design under this island's extreme conditions; ramble through a modernized courtyard, a house based on a love of circles, and an open-plan sculptural marvel inspired by the harsh, weather-beaten coastline.

Look inside homes that push the limits of design under this island's extreme conditions; ramble through a modernized courtyard, a house based on a love of circles, and an open-plan sculptural marvel inspired by the harsh, weather-beaten coastline.

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

Human remains high in the Ecuadorian Andes; in Norway, an archaeology student unearths metal artifacts; a strange, earthquake-like event in Canada; a Viking longhouse with a unique history in Greenland.

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

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

Human remains high in the Ecuadorian Andes; in Norway, an archaeology student unearths metal artifacts; a strange, earthquake-like event in Canada; a Viking longhouse with a unique history in Greenland.

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

Guest comic Mark Ballas.

Guest comic Gary Anthony Williams.

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

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

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

Look inside homes that push the limits of design under this island's extreme conditions; ramble through a modernized courtyard, a house based on a love of circles, and an open-plan sculptural marvel inspired by the harsh, weather-beaten coastline.

Look inside homes that push the limits of design under this island's extreme conditions; ramble through a modernized courtyard, a house based on a love of circles, and an open-plan sculptural marvel inspired by the harsh, weather-beaten coastline.

Look inside homes that push the limits of design under this island's extreme conditions; ramble through a modernized courtyard, a house based on a love of circles, and an open-plan sculptural marvel inspired by the harsh, weather-beaten coastline.

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.

Summer unleashes a wave of mysterious ailments in pets across the country; Dr. Dayle Poitras confronts a potentially dangerous lump in a reactive German Shepherd's mouth; Dr. Cori Stephen tackles an out-of-control infection in a dog named Trapper.

Dr. Poitras and her team rush into critical surgery to save the life of Ruger, a senior dog battling a badly infected organ; in Saskatoon, Dr. Allison helps a husky cross named Goldy who has a bad limp and a cat who has a bladder full of stones.

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

Chase down a weasel and her tiny kittens who have gone AWOL at the rehab. Hold your breath as Dr. Mikaela performs a rare medical procedure on a raccoon's injured tail, then meet Hope's new otter friend and the tiniest beaver the team has ever seen.

Scramble as the staff tries to find a place for each of the orphaned skunks, raccoons, and groundhogs that are streaming through the rehab's doors; then deal with the deadly side of spring as the team tries to save a hare wounded by a weed whacker.

Observe a pair of white, piebald fawns that pose a big rehab challenge; check out an albino skunk displaced by flash floods, see Dr. Mikaela race to save a parasite-infected chipmunk, and monitor a groundhog fighting for its life after a dog attack.

Look inside homes that push the limits of design under this island's extreme conditions; ramble through a modernized courtyard, a house based on a love of circles, and an open-plan sculptural marvel inspired by the harsh, weather-beaten coastline.

Look inside homes that push the limits of design under this island's extreme conditions; ramble through a modernized courtyard, a house based on a love of circles, and an open-plan sculptural marvel inspired by the harsh, weather-beaten coastline.

Look inside homes that push the limits of design under this island's extreme conditions; ramble through a modernized courtyard, a house based on a love of circles, and an open-plan sculptural marvel inspired by the harsh, weather-beaten coastline.

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.

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

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

Newlyweds Adam and Emma Channell want one last adventure before they begin a family; they plan to go off grid in some of Britain's most remote rural areas, the Yorkshire Dales and deepest Wales.

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

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

Newlyweds Adam and Emma Channell want one last adventure before they begin a family; they plan to go off grid in some of Britain's most remote rural areas, the Yorkshire Dales and deepest Wales.

Look inside homes that push the limits of design under this island's extreme conditions; ramble through a modernized courtyard, a house based on a love of circles, and an open-plan sculptural marvel inspired by the harsh, weather-beaten coastline.

Look inside homes that push the limits of design under this island's extreme conditions; ramble through a modernized courtyard, a house based on a love of circles, and an open-plan sculptural marvel inspired by the harsh, weather-beaten coastline.

Look inside homes that push the limits of design under this island's extreme conditions; ramble through a modernized courtyard, a house based on a love of circles, and an open-plan sculptural marvel inspired by the harsh, weather-beaten coastline.

Look inside homes that push the limits of design under this island's extreme conditions; ramble through a modernized courtyard, a house based on a love of circles, and an open-plan sculptural marvel inspired by the harsh, weather-beaten coastline.

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

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

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

Chase down a weasel and her tiny kittens who have gone AWOL at the rehab. Hold your breath as Dr. Mikaela performs a rare medical procedure on a raccoon's injured tail, then meet Hope's new otter friend and the tiniest beaver the team has ever seen.

Look inside homes that push the limits of design under this island's extreme conditions; ramble through a modernized courtyard, a house based on a love of circles, and an open-plan sculptural marvel inspired by the harsh, weather-beaten coastline.

Look inside homes that push the limits of design under this island's extreme conditions; ramble through a modernized courtyard, a house based on a love of circles, and an open-plan sculptural marvel inspired by the harsh, weather-beaten coastline.

Look inside homes that push the limits of design under this island's extreme conditions; ramble through a modernized courtyard, a house based on a love of circles, and an open-plan sculptural marvel inspired by the harsh, weather-beaten coastline.

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

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

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

Tally up the dangers in 80-year-old Filomena's beloved but crumbling home and see why her kids put out a distress call to the Holmes team; check out the aging-friendly upgrades that will keep this widow safe and help her stay in the house she loves.

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

Celebrate with Rachael and Robin as the Holmes team reworks their new bungalow to make life brighter for their daughter, Bree, who was born with trisomy 13; the three-year-old survivor's first-ever bedroom and tons of accessible features.

Aisling Bea, Mark Watson and Michelle Wolf join Sandi Toksvig and Alan Davis for a volatile episode.

Sandi Toksvig takes a look at some visionaries with Cally Beaton, Nish Kumar, Laura Smyth and Alan Davies.