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.

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.

Guest comic Mark Ballas.

Guest comic Gary Anthony Williams.

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

Revealing the truth behind the planet's ancient legends; touring an island covered in polar bears, twin craters in Greece, peeking at a supervolcano hidden under Yellowstone Park and examining an ocean formation that's eerily similar to Atlantis.

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

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.

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.

Rick reveals the right, wrong and totally impossible answers to the contestants; discovering who has what it takes to weed out the wrong info and take a crack at the 10,000-pound jackpot.

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.

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

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.

The players try to tease out which of Rick's answers are not just wrong but actually impossible; three tense rounds and seeing who is left standing to face the 10,000-pound exclamation point.

Guest comic Tiffany Coyne.

Guest comic Tiffany Haddish.

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.

Investigating an odd phenomenon that makes rocks slide across Death Valley; learning how pieces of jade rewrite Chinese history; examining animal bones that could show an earlier human arrival in the Americas; visiting Earth's oldest stone circle.

Hurricane Patricia rips apart a Mexican holiday resort sending tourists fleeing for their lives.

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

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.

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.

A firefighter support dog named Havoc creates chaos when he gets loose outside the clinic in Vanderhoof; a lab named Lincoln has concerning blood test results; it's life or death for a young foal with a debilitating condition.

Jordan Gray, Jason Manford, Sara Pascoe and Alan Davies to find the links between ugly feet, empty crisp packets, a Vermeer masterpiece and Countess Mountbatten's lingerie.

Sandi Toksvig dusts off her tinfoil hat for a look at ufology with Cally Beaton, Nish Kumar, Tom Ward, and Alan Davies.

Sandi and Alan look at some 'U' animals with Rhod Gilbert, Lara Ricote and Ahir Shah.

A new generation of survivalists are put to the test in the frozen Arctic.

A firefighter support dog named Havoc creates chaos when he gets loose outside the clinic in Vanderhoof; a lab named Lincoln has concerning blood test results; it's life or death for a young foal with a debilitating condition.

Tom Allen, Chris McCausland and Lou Sanders look at a range of unrelated 'U' topics.

Sandi Toksvig dusts off her tinfoil hat for a look at ufology with Cally Beaton, Nish Kumar, Tom Ward, and Alan Davies.

Sandi and Alan look at some 'U' animals with Rhod Gilbert, Lara Ricote and Ahir Shah.

Guest comic Tiffany Coyne.

Guest comic Tiffany Haddish.

Hurricane Patricia rips apart a Mexican holiday resort sending tourists fleeing for their lives.

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.

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

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.

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

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.

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

Lt. Ryan Graves and pilots in his squadron detect and engage with UFOs on multiple occasions; he gave a detailed description of regular encounters that flight teams had with a black box UFO they were seeing every day.

Rick reveals the right, wrong and totally impossible answers to the contestants; discovering who has what it takes to weed out the wrong info and take a crack at the 10,000-pound jackpot.

Guest comic Kaila Mullady.

Guest comic Mark Ballas.

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.

Connecting the Great Pyramid to an archeological find near the Suez Canal; unveiling the secrets of colossal rock sculptures in Saudi Arabia; a mystical geological formation deep in the Sahara; unmasking a 37-million-year-old Egyptian enigma.

In 2015, a massive earthquake in Nepal triggers a deadly avalanche on Mount Everest and mudslides that bury whole villages.

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

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.

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.

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

Discover a massive underground chamber hiding under the Seoul subway. Visit a medieval knight's limestone tomb in Poland, examine Roman ruins beneath a church in England, and ponder the identity of a 10-million-year-old fossil in Los Angeles.

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.

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

Discover a massive underground chamber hiding under the Seoul subway. Visit a medieval knight's limestone tomb in Poland, examine Roman ruins beneath a church in England, and ponder the identity of a 10-million-year-old fossil in Los Angeles.

Guest comic Kaila Mullady.

Guest comic Mark Ballas.

In 2015, a massive earthquake in Nepal triggers a deadly avalanche on Mount Everest and mudslides that bury whole villages.

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.

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

Lt. Ryan Graves and pilots in his squadron detect and engage with UFOs on multiple occasions; he gave a detailed description of regular encounters that flight teams had with a black box UFO they were seeing every day.

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.

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.

Exploring an ancient Egyptian cemetery filled with everyday people and find links to historic weaponry in a horseshoe-shaped French monument; puzzle over a lost South Asian society, then see if human remains found in Wales hint at coastal rituals.

A Canadian farmer sees five identical bun-shaped objects; thousands report seeing a large triangular-shaped object for a 3-year period over New York's Hudson Valley.

A triangular craft beelines toward a husband and his pregnant wife; a disc-shaped craft emits a solid beam of light that releases a blast of flame.

Ready to say goodbye to this group of contestants, who are primed and ready for their last shot at taking home the 10,000 pounds.

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.

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

The strongest hurricane to ever hit the Western Hemisphere crashes into Mexico; a tornado tosses trucks in Texas.

Exploring an ancient Egyptian cemetery filled with everyday people and find links to historic weaponry in a horseshoe-shaped French monument; puzzle over a lost South Asian society, then see if human remains found in Wales hint at coastal rituals.

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.

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.

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.

In the rain forests of Belize, researchers find a bizarre skeleton deep underground in a mysterious cave; an ancient city is discovered on a remote plateau in Cambodia; a strange coin is unearthed on the Wessel Islands of Australia.

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

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.

In the rain forests of Belize, researchers find a bizarre skeleton deep underground in a mysterious cave; an ancient city is discovered on a remote plateau in Cambodia; a strange coin is unearthed on the Wessel Islands of Australia.

Guest comic Tiffany Coyne.

Guest comic Jordin Sparks.

The strongest hurricane to ever hit the Western Hemisphere crashes into Mexico; a tornado tosses trucks in Texas.

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.

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

A Canadian farmer sees five identical bun-shaped objects; thousands report seeing a large triangular-shaped object for a 3-year period over New York's Hudson Valley.

A triangular craft beelines toward a husband and his pregnant wife; a disc-shaped craft emits a solid beam of light that releases a blast of flame.

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.

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.

Drones reveal what's left of Henry Ford's American suburb in the Brazilian jungle; looking for clues to what killed a once-vibrant Pennsylvania mining town; an aerial glimpse of New York's forgotten ghost town; an Italian Renaissance reduced to dust.

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

With the drone flying and the ground hunters at their heels, things look bleak for Bob and Alex Ayling; ex-cop Jamie uses a cash machine while city girls Sandra and Mella reach Scotland.

Weighing options carefully as Rick welcomes 24 new contestants, who all want a chance to make 10,000 one-pound coins rain from the giant exclamation point on stage; seeing who wins big by keeping their cool and dodging the impossible answers.

Guest comic Tiffany Coyne.

Guest comic Tiffany Haddish.

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.

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

Car and truck drivers flea the biggest tornado ever recorded as it crosses the highway outside El Reno.

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

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 Mark Ballas.

Guest comic Gary Anthony Williams.

Drones reveal what's left of Henry Ford's American suburb in the Brazilian jungle; looking for clues to what killed a once-vibrant Pennsylvania mining town; an aerial glimpse of New York's forgotten ghost town; an Italian Renaissance reduced to dust.

Featuring Graham trading quips with Bruce Springsteen, Jeremy Allen White, Jennifer Lawrence, Tessa Thompson; there's live music from Florence.

The Goggleboxers share their thoughts on "The Celebrity Traitors," "Love Is Blind," "Coronation Street," "The Girlfriend," "Nightmares of Nature," "The Reluctant Traveller" and "Yorkshire Air 999.".

Guest comic Kaila Mullady.

Guest comic Mark Ballas.

Featuring Graham trading quips with Bruce Springsteen, Jeremy Allen White, Jennifer Lawrence, Tessa Thompson; there's live music from Florence.

The Goggleboxers share their thoughts on "The Celebrity Traitors," "Love Is Blind," "Coronation Street," "The Girlfriend," "Nightmares of Nature," "The Reluctant Traveller" and "Yorkshire Air 999.".

With the drone flying and the ground hunters at their heels, things look bleak for Bob and Alex Ayling; ex-cop Jamie uses a cash machine while city girls Sandra and Mella reach Scotland.

Car and truck drivers flea the biggest tornado ever recorded as it crosses the highway outside El Reno.

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.

Discover a massive underground chamber hiding under the Seoul subway. Visit a medieval knight's limestone tomb in Poland, examine Roman ruins beneath a church in England, and ponder the identity of a 10-million-year-old fossil in Los Angeles.

A giant ice stack on a remote lake spouts a strange vapor, dazzling jeweled objects litter a dank cave floor and a man's shout causes a lake to bizarrely react with thousands of ripples.

Zac and Darin test their cooking skills in Melbourne, Australia, before heading to the Torres Strait Islands to understand the impact of rising sea levels.

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

The 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.

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.

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.

Paid programming.

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

Discover a massive underground chamber hiding under the Seoul subway. Visit a medieval knight's limestone tomb in Poland, examine Roman ruins beneath a church in England, and ponder the identity of a 10-million-year-old fossil in Los Angeles.

Featuring Graham trading quips with Bruce Springsteen, Jeremy Allen White, Jennifer Lawrence, Tessa Thompson; there's live music from Florence.

The Goggleboxers share their thoughts on "The Celebrity Traitors," "Love Is Blind," "Coronation Street," "The Girlfriend," "Nightmares of Nature," "The Reluctant Traveller" and "Yorkshire Air 999.".

Jordan Gray, Jason Manford, Sara Pascoe and Alan Davies to find the links between ugly feet, empty crisp packets, a Vermeer masterpiece and Countess Mountbatten's lingerie.

Tom Allen, Chris McCausland and Lou Sanders look at a range of unrelated 'U' topics.

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.

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.

Jordan Gray, Jason Manford, Sara Pascoe and Alan Davies to find the links between ugly feet, empty crisp packets, a Vermeer masterpiece and Countess Mountbatten's lingerie.

Tom Allen, Chris McCausland and Lou Sanders look at a range of unrelated 'U' topics.

Discover a massive underground chamber hiding under the Seoul subway. Visit a medieval knight's limestone tomb in Poland, examine Roman ruins beneath a church in England, and ponder the identity of a 10-million-year-old fossil in Los Angeles.

A medical-school dropout tries to hide his attraction to his new friend, a bubbly artist who already has a boyfriend.

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

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.

Discover a massive underground chamber hiding under the Seoul subway. Visit a medieval knight's limestone tomb in Poland, examine Roman ruins beneath a church in England, and ponder the identity of a 10-million-year-old fossil in Los Angeles.

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

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

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.

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

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

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

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

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

Discover a massive underground chamber hiding under the Seoul subway. Visit a medieval knight's limestone tomb in Poland, examine Roman ruins beneath a church in England, and ponder the identity of a 10-million-year-old fossil in Los Angeles.

Guest comic Mark Ballas.

Paid programming.

Lt. Ryan Graves and pilots in his squadron detect and engage with UFOs on multiple occasions; he gave a detailed description of regular encounters that flight teams had with a black box UFO they were seeing every day.

The Goggleboxers share their thoughts on "The Celebrity Traitors," "Love Is Blind," "Coronation Street," "The Girlfriend," "Nightmares of Nature," "The Reluctant Traveller" and "Yorkshire Air 999.".

Guest comic Tiffany Coyne.

Guest comic Jordin Sparks.

Sandi Toksvig dusts off her tinfoil hat for a look at ufology with Cally Beaton, Nish Kumar, Tom Ward, and Alan Davies.

Sandi and Alan look at some 'U' animals with Rhod Gilbert, Lara Ricote and Ahir Shah.

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

The Goggleboxers share their thoughts on "The Celebrity Traitors," "Love Is Blind," "Coronation Street," "The Girlfriend," "Nightmares of Nature," "The Reluctant Traveller" and "Yorkshire Air 999.".

A new generation of survivalists are put to the test in the frozen Arctic.

Discover a massive underground chamber hiding under the Seoul subway. Visit a medieval knight's limestone tomb in Poland, examine Roman ruins beneath a church in England, and ponder the identity of a 10-million-year-old fossil in Los Angeles.

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.

Private investigator Jennifer Marshall and paranormal investigator Ali Houmani investigate whether dreams can kill.

From Thailand's highway collapses and bakery fires to London's crowded skyline and coastal erosion, we examine the structural failures and urban pressures threatening our modern world.

Sign off.

Private investigator Jennifer Marshall and paranormal investigator Ali Houmani investigate whether dreams can kill.

The strongest hurricane to ever hit the Western Hemisphere crashes into Mexico; a tornado tosses trucks in Texas.

A new generation of survivalists are put to the test in the frozen Arctic.

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.

Private investigator Jennifer Marshall and paranormal investigator Ali Houmani investigate whether dreams can kill.

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

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

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

As seen from space, a crater in Turkmenistan, is on fire; drones reveal perfect circles in the Namibian desert; A puzzle is solved by a World War 2 code breaker; Mystery of Death Valley's self-moving stones; Utah's strange electric blue ponds.

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

A British Air Force officer is stunned when a cylindrical object sends a beam of light toward him; school children witness multiple UFO sightings over a three-day period.

Most accounts of UFO sightings can be explained by and attributed to normal earthly phenomena. Those that cannot be solved, however, have police investigators, government officials and researchers puzzled, even decades later in some cases. In each episode of "Close Encounters," two stories of alien phenomena around the world are investigated, re-created and reviewed by researchers. In the telling of each one, the program reveals to viewers facts about thousands of reported occurrences.

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

Guest comic Maile Brady.

Guest comic Jeff Davis.

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.

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

Super Typhoon Yolanda - the biggest ever recorded- destroys swathes of the Philippines; a huge falling glacier in Greenland unleashes a tsunami-like wave; Houston is sunk underwater by a massive flood that almost drowns a herd of horses.

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

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.

As seen from space, a crater in Turkmenistan, is on fire; drones reveal perfect circles in the Namibian desert; A puzzle is solved by a World War 2 code breaker; Mystery of Death Valley's self-moving stones; Utah's strange electric blue ponds.

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.

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.

An Ontario man flings into a tornado; a helicopter and jet ski rescue team go into an intense flood; an avalanche crashes a party; an adventurer survives being trapped upside down in a raging river in Papua New Guinea.

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.

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.

Guest comic Maile Brady.

Guest comic Jeff Davis.

Super Typhoon Yolanda - the biggest ever recorded- destroys swathes of the Philippines; a huge falling glacier in Greenland unleashes a tsunami-like wave; Houston is sunk underwater by a massive flood that almost drowns a herd of horses.

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.

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

A British Air Force officer is stunned when a cylindrical object sends a beam of light toward him; school children witness multiple UFO sightings over a three-day period.

Most accounts of UFO sightings can be explained by and attributed to normal earthly phenomena. Those that cannot be solved, however, have police investigators, government officials and researchers puzzled, even decades later in some cases. In each episode of "Close Encounters," two stories of alien phenomena around the world are investigated, re-created and reviewed by researchers. In the telling of each one, the program reveals to viewers facts about thousands of reported occurrences.

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 remote island linked to one of the world's most famous aviation mysteries; thousands of shipwrecks in the Bermuda triangle; a history lost and found in the South Pacific; a 10,000-year-old mystery in the murky depths of the Yucatan Peninsula.

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.

When seen from above, the pyramids of Giza align with the stars; survivors of Katrina find rescue when least expected; a volcano burns bright blue; a forgotten beach reveals its secrets.

Squaring off on national parks, Downton Abbey, musical theatre and human anatomy.

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.

Exploring an ancient Egyptian cemetery filled with everyday people and find links to historic weaponry in a horseshoe-shaped French monument; puzzle over a lost South Asian society, then see if human remains found in Wales hint at coastal rituals.

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.

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.

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.

A remote island linked to one of the world's most famous aviation mysteries; thousands of shipwrecks in the Bermuda triangle; a history lost and found in the South Pacific; a 10,000-year-old mystery in the murky depths of the Yucatan Peninsula.

A cat named Kiki is in a bad way after a fight on the farm, and a rescue puppy named Gemma shocks the clinic during ear surgery; Jerry the goat will starve unless Dr. Poitras can figure out why he's not eating properly.

Justin Moorhouse, Emmanuel Sonubi and Holly Walsh join.

Sandi Toksvig is joined by Maisie Adam, Daliso Chaponda, Jack Dee and Alan Davies for a look at some underthings.

Sandi Toksvig goes to university with Guz Khan, Joe Lycett, Morgana Robinson and Alan Davies.

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

A cat named Kiki is in a bad way after a fight on the farm, and a rescue puppy named Gemma shocks the clinic during ear surgery; Jerry the goat will starve unless Dr. Poitras can figure out why he's not eating properly.

Sandi Toksvig takes a look at upbringing with Sally Phillips, Josh Pugh, Aaron Simmonds and Alan Davies.

Sandi Toksvig is joined by Maisie Adam, Daliso Chaponda, Jack Dee and Alan Davies for a look at some underthings.

Sandi Toksvig goes to university with Guz Khan, Joe Lycett, Morgana Robinson and Alan Davies.

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

Guest comic Greg Proops.

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.

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.

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.

When seen from above, the pyramids of Giza align with the stars; survivors of Katrina find rescue when least expected; a volcano burns bright blue; a forgotten beach reveals its secrets.

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.

Just after shuttering many businesses in response to the pandemic, Jonesboro, Ark., takes another hit from a natural disaster; an EF3 tornado touches down on the south side of the city and plows across the busiest parts of Jonesboro.

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.

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

In the summer of 1952, stories of U.S. Air Force jets chasing UFOs over the White House knock the Korean War off the front pages of newspapers; as rumors spread, President Harry S. Truman demands to know what was flying over his house.

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.

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.

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

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.

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

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 Mark Ballas.

Guest comic Gary Anthony Williams.

Strange aquatic mammals populating a river in Columbia; a ship marooned in a sea of sand along Namibia's notorious Skeleton Coast; a Boeing 727 jetliner hidden in a pine forest; an unusual pattern is discovered in the Nevada desert.

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

Visit a strange wood-lined tunnel beneath a Copenhagen train station. Locate one of North America's earliest schools for Black children in Virginia, excavate a warrior cemetery in Finland, and unearth a women-only burial plot beneath a Welsh castle.

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.

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

Visit a strange wood-lined tunnel beneath a Copenhagen train station. Locate one of North America's earliest schools for Black children in Virginia, excavate a warrior cemetery in Finland, and unearth a women-only burial plot beneath a Welsh castle.

Guest comic Mark Ballas.

Guest comic Gary Anthony Williams.

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.

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.

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

In the summer of 1952, stories of U.S. Air Force jets chasing UFOs over the White House knock the Korean War off the front pages of newspapers; as rumors spread, President Harry S. Truman demands to know what was flying over his house.

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.

The Goggleboxers share their thoughts on "The Celebrity Traitors," "Love Is Blind," "Coronation Street," "The Girlfriend," "Nightmares of Nature," "The Reluctant Traveller" and "Yorkshire Air 999.".

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.

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

A surge of sightings in Colares, Brazil in 1977 causes major panic and thousands of people leave the island as a result; On a dairy farm in Australia, a mysterious flying object causes a brutal headache for the farmer.

Officials have to decide how to confront a large, unidentified object hovering over one of America's most secure Air Force bases; a priest communicates with four beings on a saucer-shaped metallic craft in Papua, New Guinea.

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.

Improv veterans Ryan Stiles, Wayne Brady and Colin Mochrie return for a new take on the comedy series with host, Aisha Tyler. Each episode, a special guest star joins the comics as they tackle a series of spontaneous improvised sketches, with only a few random ideas from the studio audience and their host. With little information and a lot of imagination, the comics depict a variety of characters and scenes, and even perform songs. At the end of each round, Aisha awards points to each of the four performers and announces a winner at the end of every episode.

Improv veterans Ryan Stiles, Wayne Brady and Colin Mochrie return for a new take on the comedy series with host, Aisha Tyler. Each episode, a special guest star joins the comics as they tackle a series of spontaneous improvised sketches, with only a few random ideas from the studio audience and their host. With little information and a lot of imagination, the comics depict a variety of characters and scenes, and even perform songs. At the end of each round, Aisha awards points to each of the four performers and announces a winner at the end of every episode.

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.

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

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

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

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.

Improv veterans Ryan Stiles, Wayne Brady and Colin Mochrie return for a new take on the comedy series with host, Aisha Tyler. Each episode, a special guest star joins the comics as they tackle a series of spontaneous improvised sketches, with only a few random ideas from the studio audience and their host. With little information and a lot of imagination, the comics depict a variety of characters and scenes, and even perform songs. At the end of each round, Aisha awards points to each of the four performers and announces a winner at the end of every episode.

Improv veterans Ryan Stiles, Wayne Brady and Colin Mochrie return for a new take on the comedy series with host, Aisha Tyler. Each episode, a special guest star joins the comics as they tackle a series of spontaneous improvised sketches, with only a few random ideas from the studio audience and their host. With little information and a lot of imagination, the comics depict a variety of characters and scenes, and even perform songs. At the end of each round, Aisha awards points to each of the four performers and announces a winner at the end of every episode.

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.