Stephen Fry meditates on matters medieval and macabre with guests Julia Zemiro, Matt Lucas and David Mitchell.

Separate the right from the wrong, then try to figure out what's downright impossible; follow a horde of keen players as they vie for glory and a chance to unlock 10,000 pounds trapped inside the giant exclamation mark on stage.

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

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

The bakers feel the stress of crafting decadent desserts as they take on steamed pudding, lemon meringue pie and mousse.

Tackle questions about a pharaoh's untimely death at age 19; dig into the physical evidence left behind in his tomb and learn why experts haven't sorted out whether he died of natural causes, poisoning or an accident.

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

Three graves are discovered on the frozen beach of an uninhabited Arctic island; the mummified corpses inside may answer a centuries-old mystery of an expedition that was literally consumed by the cannibalistic insanity of its mutinous crew.

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.

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.

Three graves are discovered on the frozen beach of an uninhabited Arctic island; the mummified corpses inside may answer a centuries-old mystery of an expedition that was literally consumed by the cannibalistic insanity of its mutinous crew.

Tackle questions about a pharaoh's untimely death at age 19; dig into the physical evidence left behind in his tomb and learn why experts haven't sorted out whether he died of natural causes, poisoning or an accident.

Guests include Cher, Michael Fassbender, Keira Knightley, Josh Brolin and Jalen Ngonda.

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

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

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

Separate the right from the wrong, then try to figure out what's downright impossible; follow a horde of keen players as they vie for glory and a chance to unlock 10,000 pounds trapped inside the giant exclamation mark on stage.

Honour history's fashion icons in the quarter-final battle; the final five take on Audrey Hepburn's iconic little black dress; shower-curtain frocks designed by Esme Young.

Get down to business with the four semifinalists, who must construct an office-staple trench coat from scratch; marvel as the sewers convert everyday cleaning items into wearable art, then transform humble boilersuits into runway-worthy masterpieces.

Separate the right from the wrong, then try to figure out what's downright impossible; follow a horde of keen players as they vie for glory and a chance to unlock 10,000 pounds trapped inside the giant exclamation mark on stage.

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

Face down infernos that are causing unprecedented devastation.

A ship blocks the most important route in global trade; a strange Scottish creature chases a mountaineer; mystery lights stalk allied pilots in Nazi Germany; determining if these are tricks of the mind or wild weather.

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

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

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.

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

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

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

Separate the right from the wrong, then try to figure out what's downright impossible; follow a horde of keen players as they vie for glory and a chance to unlock 10,000 pounds trapped inside the giant exclamation mark on stage.

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

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

Anak Krakatoa unexpectedly erupts, blowing away a large portion of the volcano which causes a rare volcanic/landslide tsunami.

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

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

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

A man observes a saucer-shaped object in a lagoon; an unusual light in a field causes the driver to veer off the road.

A star lands in France, emitting solid beams of light; Belgian police officers follow a triangular craft that shoots out that are red balls of light.

On the island of Pohnpei in Micronesia, explorers discover ancient structures hidden beneath dense vegetation; a strange glowing forest is discovered in India; an immense tunnel system is investigated in the Brazilian jungle.

Along the coastline, Zac and Darin take a deep dive into the coral reef restoration techniques supporting a vast underwater ecosystem.

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.

Using all-natural ingredients, the mixologists pair up to construct botanical cocktails as industry pioneer Dale DeGroff joins the judges.

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

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

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

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

Alaskans embrace the flowing waters and returning wildlife of spring.

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

A 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.

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.

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

A 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.

Along the coastline, Zac and Darin take a deep dive into the coral reef restoration techniques supporting a vast underwater ecosystem.

Face down infernos that are causing unprecedented devastation.

Tackle questions about a pharaoh's untimely death at age 19; dig into the physical evidence left behind in his tomb and learn why experts haven't sorted out whether he died of natural causes, poisoning or an accident.

Alaskans embrace the flowing waters and returning wildlife of spring.

A ship blocks the most important route in global trade; a strange Scottish creature chases a mountaineer; mystery lights stalk allied pilots in Nazi Germany; determining if these are tricks of the mind or wild weather.

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.

A seal contracts a mysterious illness.

Many fawns are in need of help.

Brenda and Peter have two young daughters and love their Minneapolis neighborhood, but they've outgrown their home, and they need Mike's expertise as they view the new houses they're considering, hoping to pick the best home for their family.

Paid programming.

The rehab is flooded with orphaned seals, with some frozen solid in ice.

Hope puts everything on the line to save an orphaned black bear cub; two bobcats are ready for release, but they won't go easy.

When a great horned owl arrives covered in oil, Doctor Sherri must put it through a terrifying, life-saving procedure; boxes of young foxes need help and attention.

Hope's team struggles to help two rescued harp seals learn the natural behaviors they will need to survive in the wild.

When a tiny piece of trash ruins a raccoon's life, Doctor Jessica cuts it free, but Hope faces tough decisions about its future; a volunteer plunges in to save an injured goose.

When a tiny fawn gets hit by a car, Doctor Jessica must splint its broken leg or it will never return to the wild; a mother porcupine arrives with baby in tow and both need life-saving attention for a parasitic infection.

Just as Hope is scrambling to get ready for her busiest day of the year, the government decides to seize the bear cub Hope's worked so hard to save.

When a Category 2 hurricane slams straight into the rehab, Hope and her team struggle to protect their patients in the middle of the raging storm.

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.

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.

Deal with heartbreaking cases, including a bald eagle that has mysteriously lost its ability to fly. Watch over a chilled fawn that won't eat, a hummingbird with dangerously sticky wings, and a snapping turtle that got caught in a city reservoir.

Cope with injuries caused by human neglect and malice, including a gull that ate a metal shard and animals shot by pellet guns. Celebrate the recovery of two foxes with avian flu and witness the joyous release of 12 robins and a snapping turtle.

A photographer snaps into action to save a turkey vulture's life after it gets trapped under a seal carcass.

When a worldwide pandemic cripples the rehab, wildlife emergencies keep coming in: a bobcat that's been shot, and a massive adult seal; Hope's down to a skeleton crew as critical team members go into quarantine.

A warmer planet creates drier conditions and increasing lightning activity, causing catastrophic wildfires and other anomalies like "firenadoes"; megastorm events occur in California and Alberta, Canada.

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.

Ten bakers arrive in the white baking tent to face the first challenge.

The bakers take on three challenges for bread week.

The remaining eight bakers face a series of sweet challenges during dessert week.

Using all-natural ingredients, the mixologists pair up to construct botanical cocktails as industry pioneer Dale DeGroff joins the judges.

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

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

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

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

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

A thrilling battle of brainpower as four contestants pit their wits against The Chaser.

A thrilling battle of brainpower as four contestants pit their wits against The Chaser.

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

Stephen Fry mixes and matches a medley of M-subjects with guests Jo Brand and James Acaster.

Stephen Fry corrects some misconceptions with Sue Perkins, Sara Cox, Chris Addison, and Alan Davies.

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

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

Size up answers with the contestants, who are sure they know what's right, what's wrong and what's impossible; battle through three mind-bending rounds of competition and see if someone cracks the 10,000-pound question.

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

Size up answers with the contestants, who are sure they know what's right, what's wrong and what's impossible; battle through three mind-bending rounds of competition and see if someone cracks the 10,000-pound question.

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.

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.

Take a deep dive into watery enigmas; glide over a sunken Italian city; a unique underwater cemetery in the Florida Keys; a yellow brick road to nowhere in the depths of the North Pacific; puzzling rocky constructions off the coast of Australia.

Brenda and Peter have two young daughters and love their Minneapolis neighborhood, but they've outgrown their home, and they need Mike's expertise as they view the new houses they're considering, hoping to pick the best home for their family.

Six astronauts try to produce the most detailed 3-D images of Earth aboard the Space Shuttle Endeavour.

Night after night, Lyle Lovett and his 14 member band keep the show sizzling.

The top seven candidates prepare homegrown classics.

The bakers are challenged to re-create popular British desserts.

The remaining bakers celebrate the holiday season with three challenges.

In teams of three, the contestants develop drinks from gin, bourbon, and rum for a 1920s-themed challenge; guests at a cocktail party decide their fate.

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

Featuring Claudia Winkleman trading quips with Chris Pratt, Saoirse-Monica Jackson, Rob Beckett, Toby Jones and Rachel Chinouriri.

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.

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.

Size up answers with the contestants, who are sure they know what's right, what's wrong and what's impossible; battle through three mind-bending rounds of competition and see if someone cracks the 10,000-pound question.

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.

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 ship is found abandoned but undamaged in the middle of the ocean; a mysterious glowing orb chases locals down a railway track in Arkansas; Amelia Earhart vanishes on her pioneering round-the-world trip.

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

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

A ship is found abandoned but undamaged in the middle of the ocean; a mysterious glowing orb chases locals down a railway track in Arkansas; Amelia Earhart vanishes on her pioneering round-the-world trip.

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

Featuring Claudia Winkleman trading quips with Chris Pratt, Saoirse-Monica Jackson, Rob Beckett, Toby Jones and Rachel Chinouriri.

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.

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.

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 multicoloured pools across northern Ethiopia and a huge human figure hidden in the Australian outback.

Keith and Michelle have a limited budget.

After moving from Austria to the U.S., a father, mother and daughter search for a home with a classic California beach view.

An inside look at the Kellog's NASCAR racing team, with pro driver Kyle Bush.

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

The remaining four bakers face three challenges during French Patisserie Week.

The top three bakers go for broke in an exciting, intense finale; looking at elegant mini mousse cakes, exquisite pear charlottes, and multi-tiered wedding cakes before one big winner is named Canada's top baker.

Paid programming.

Sisters Michelle and Sonia run Miracles Outreach to house girls who have aged out of the foster program, and they need a new house and Mike's help; Mike assesses their prospective houses to help them find a home that is worth their investment.

Eight mixologists create cocktails inspired by delicious desserts; Gonzo Jimenez adds his expertise.

Size up answers with the contestants, who are sure they know what's right, what's wrong and what's impossible; battle through three mind-bending rounds of competition and see if someone cracks the 10,000-pound question.

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.

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 thrilling battle of brainpower as four contestants pit their wits against The Chaser.

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

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

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

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

The origins of a colossal image of a man carved into the red sands of Central Australia; mysterious mummies and peculiar whale bones resting in two different parts of Chile's Atacama Desert; a lost Egyptian tomb.

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

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

Special guests Penn & Teller.

Guest comic Jack Osbourne.

Guest comic Keegan-Michael Key.

Guest comedian Rachel Bloom.

A thrilling battle of brainpower as four contestants pit their wits against The Chaser.

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

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

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 three-part challenge puts the competitors' technical abilities, speed, and precision to the test.

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

The competition heats up as the mixologists craft cocktails with a spicy kick; award-winning bartender Tiffanie Barriere guest judges.

Determined to compete in the finale, the four remaining contestants prepare a flight of cocktails using the judges' favorite spirits.

Three bartenders face off in the finale.

Learning why an important urban center is sinking toward oblivion; soaring over sprawling ruins buried under Saharan sands; learning the modern secret of an ancient fortress; eyeing a ghost town on the edge of the Gobi.

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.

Featuring Claudia Winkleman trading quips with Chris Pratt, Saoirse-Monica Jackson, Rob Beckett, Toby Jones and Rachel Chinouriri.

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.

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.

Special guests Penn & Teller.

Guest comic Jack Osbourne.

Guest comic Keegan-Michael Key.

Guest comedian Rachel Bloom.

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

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

Graham's guests are Hollywood stars Sigourney Weaver and Nicholas Hoult, celebrity chef Jamie Oliver, actor Lolly Adefope and supergroup Coldplay, who chat and perform their current single, "All My Love.".

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

Stephen Fry mixes and matches a medley of M-subjects with guests Jo Brand and James Acaster.

Stephen Fry corrects some misconceptions with Sue Perkins, Sara Cox, Chris Addison, and Alan Davies.

Graham's guests are Hollywood stars Sigourney Weaver and Nicholas Hoult, celebrity chef Jamie Oliver, actor Lolly Adefope and supergroup Coldplay, who chat and perform their current single, "All My Love.".

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

Stephen Fry mixes and matches a medley of M-subjects with guests Jo Brand and James Acaster.

Stephen Fry corrects some misconceptions with Sue Perkins, Sara Cox, Chris Addison, and Alan Davies.

Size up answers with the contestants, who are sure they know what's right, what's wrong and what's impossible; battle through three mind-bending rounds of competition and see if someone cracks the 10,000-pound question.

Demi Moore starring in the critically acclaimed body-horror "The Substance"; music superstar and actor Lady Gaga; Colin Farrell taking the title role in "The Penguin"; Richard Ayoade talking about his new book "The Unfinished Harauld Hughes.".

Interviewing Hugh Grant, Sebastian Stan, Greg Davies and Neneh Cherry; performance from Perie.

BAFTA Award-winning comedian Graham Norton hosts this long-running, eponymous talk show on which he discusses the people, trends and news stories that interest him the most. As you'd expect from a comedic talk show, Norton performs a monologue and other comedy sketches, which include eccentric stories and characters, while welcoming celebrity guests and musical performers. The hourlong program often includes madcap audience participation. The party happens in Graham's world - and you're invited.

Ten bakers arrive in the white baking tent to face the first challenge.

The bakers take on three challenges for bread week.

The remaining eight bakers face a series of sweet challenges during dessert week.

The top seven candidates prepare homegrown classics.

The bakers are challenged to re-create popular British desserts.

The remaining bakers celebrate the holiday season with three challenges.

The remaining four bakers face three challenges during French Patisserie Week.

The top three bakers go for broke in an exciting, intense finale; looking at elegant mini mousse cakes, exquisite pear charlottes, and multi-tiered wedding cakes before one big winner is named Canada's top baker.

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

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

Size up answers with the contestants, who are sure they know what's right, what's wrong and what's impossible; battle through three mind-bending rounds of competition and see if someone cracks the 10,000-pound question.

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.

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.

Size up answers with the contestants, who are sure they know what's right, what's wrong and what's impossible; battle through three mind-bending rounds of competition and see if someone cracks the 10,000-pound question.

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

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

A ship is found abandoned but undamaged in the middle of the ocean; a mysterious glowing orb chases locals down a railway track in Arkansas; Amelia Earhart vanishes on her pioneering round-the-world trip.

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

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

Strange markings in the remote reaches of Northern Finland; drones find a Manhattan-sized mystery in the depths of a Vietnamese cave; secrets are no longer hidden in the Antarctic; a lost sky-high world in Mozambique gets a visit from above.

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

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

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

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

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.

Deal with heartbreaking cases, including a bald eagle that has mysteriously lost its ability to fly. Watch over a chilled fawn that won't eat, a hummingbird with dangerously sticky wings, and a snapping turtle that got caught in a city reservoir.

Cope with injuries caused by human neglect and malice, including a gull that ate a metal shard and animals shot by pellet guns. Celebrate the recovery of two foxes with avian flu and witness the joyous release of 12 robins and a snapping turtle.

Take a deep dive into watery enigmas; glide over a sunken Italian city; a unique underwater cemetery in the Florida Keys; a yellow brick road to nowhere in the depths of the North Pacific; puzzling rocky constructions off the coast of Australia.

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

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

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

Demi Moore starring in the critically acclaimed body-horror "The Substance"; music superstar and actor Lady Gaga; Colin Farrell taking the title role in "The Penguin"; Richard Ayoade talking about his new book "The Unfinished Harauld Hughes.".

Interviewing Hugh Grant, Sebastian Stan, Greg Davies and Neneh Cherry; performance from Perie.

A thrilling battle of brainpower as four contestants pit their wits against The Chaser.

Special guests Penn & Teller.

Guest comic Jack Osbourne.

Guest comic Keegan-Michael Key.

Guest comedian Rachel Bloom.

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

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

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

Sign off.

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

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

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

Size up answers with the contestants, who are sure they know what's right, what's wrong and what's impossible; battle through three mind-bending rounds of competition and see if someone cracks the 10,000-pound question.

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.

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.

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

An enormous fiery vortex in Redding, Calif.; the island nation of Malta loses a natural treasure; a mysterious radioactive hotspot is discovered near Chernobyl; an unknown force lays waste to a mountain forest in Italian Alps.

Investigate an abandoned village in the shifting sands on Dubai's outskirts and a collection of inexplicable stone circles in Colombia; wing your way over a mysterious hilltop tower in Iran and a puzzling purple phenomenon in Chile's Atacama Desert.

Come across a set of disturbingly familiar stone monoliths in Colombia, then explore a lost city in the Sierra Nevada de Santa Marta. Puzzle over an ancient ruin in Corinth, Greece, and explore a mind-blowing old structure on a Maltese island.

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

A silent, orange football-shaped object is spotted over Loring Air Force Base in Maine; a Swedish farmer witnesses a crash into a lake.

Paid programming.

On the volcanic island of Kolombagara, explorers uncover a mysterious man-made cave in the dense jungle; a researcher finds two unknown animal skulls in Vietnam; human remains are discovered in a narrow chamber of a South African cave system.

Stories of ghost towns, including Pripyat and Hashima Island.

The U.S. gains information about space borders using unwanted battleship guns; a V2 rocket is developed from the remains of a secret Nazi base.

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

Once-great triumphs of marine engineering now left to rust include a ship graveyard in Maryland.

A look at disused structures that used to be at the forefront of the world's power supply, including Budapest's Kelenfold Power Station and New York's Wardenclyffe Tower.

A crumbling hill in the Peak District and dunes in California causes the closure of two roads; a route used by the French Resistance is closed in 2003.