Private investigator Jennifer Marshall and paranormal researcher Sara Gray travel to Rhode Island and visit the "Conjuring" house to investigate some of the most terrifying mysteries behind the home that inspired the supernatural film series.

Jennifer Marshall and Ryan Sprague investigate one of the most mysterious UFO events in U.S. history.

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.

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.

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

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

Private investigator Jennifer Marshall and paranormal researcher Sara Gray travel to Rhode Island and visit the "Conjuring" house to investigate some of the most terrifying mysteries behind the home that inspired the supernatural film series.

Jennifer Marshall and Ryan Sprague investigate one of the most mysterious UFO events in U.S. history.

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.

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.

Paid programming.

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.

Uncover a vast underground city in Turkey that served as a refuge for Christians and Jews. Investigate a mysterious chalk chamber in England, visit a secret Etruscan complex beneath an Italian wine cellar, and map an ancient tunnel network in Iran.

Marvel at the crystal caves and underground chapels of Poland's Wieliczka salt mine. Tour a secret Cold War bunker in England, unearth a 3,400-year-old royal settlement in Egypt, and try to solve the mystery of China's enigmatic Longyou Caves.

Investigate a tomb in Naples that may contain a prince who inspired the legend of Dracula. Read the desperate letters of Jewish rebels hidden in an Israeli cave, tour a 6,000-year-old labyrinth in Malta, and see the oldest human burial in Africa.

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.

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.

Walk the service tunnels hidden beneath Emperor Hadrian's lavish villa in Italy. Uncover a chilling mass grave from the Thirty Years' War in Germany, find the foundations of a Roman basilica in London, and glimpse Neolithic life on a Danish island.

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.

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

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

In Russia, 34,000-year-old graves are discovered; a team attempts to locate a World War II British airplane that went missing in Iceland; tiny fossils in an Alaskan riverbank; a massive, previously undiscovered depression in the ice in Antarctica.

Walk the service tunnels hidden beneath Emperor Hadrian's lavish villa in Italy. Uncover a chilling mass grave from the Thirty Years' War in Germany, find the foundations of a Roman basilica in London, and glimpse Neolithic life on a Danish island.

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

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

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

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

Investigate a tomb in Naples that may contain a prince who inspired the legend of Dracula. Read the desperate letters of Jewish rebels hidden in an Israeli cave, tour a 6,000-year-old labyrinth in Malta, and see the oldest human burial in Africa.

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.

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.

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.

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.

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.

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Gyles Brandreth, Lulu and Emmanuel Sonubi join Sandi and Alan.

Neil Delamere, Cariad Lloyd and Chris McCausland join Sandi and Alan.

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

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

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

Lightning strikes wreak havoc on buildings, cities sink across the globe and massive structures are on the brink of collapse.

Three men vanish from a remote Scottish lighthouse; dozens of mines explode simultaneously during the Vietnam War, for no apparent reason; ten billion snow crabs disappear from the Bering Sea.

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

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

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.

U.S. Navy veteran turned private investigator Jennifer Marshall and psychic Sierra Cona investigate a series of disturbing events in Cerro Gordo.

In a Danish bog, hundreds of mutilated ancient bones are found, while a mysterious deserted island belonging to Russia is explored.

Sign off.

U.S. Navy veteran turned private investigator Jennifer Marshall and psychic Sierra Cona investigate a series of disturbing events in Cerro Gordo.

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

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

A grim discovery in a Swedish lake reveals ancient practices; in the Canadian Arctic, the fossil of a previously unknown mammal is found; bizarre ice formations in the Antarctic Ocean; a discovery off the east coast of Canada.

In a Danish bog, hundreds of mutilated ancient bones are found, while a mysterious deserted island belonging to Russia is explored.

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.

As climate change has accelerated, weather has mutated and become more dangerous and unpredictable.

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.

Contractor extraordinaire Mike Holmes has helped hundreds of people get the home or renovation they deserve, but now the homeowner who needs a hand is his son Mike Jr (MJ). "Holmes & Holmes" documents their working and personal relationship as they tackle the renovation of MJ's 750-square-foot bungalow so he and girlfriend Lisa can have a place of their own to start a family. Of course, no sooner is MJ's modest fix-up turned upside down by Mike's ambitious plans to gut the house and add a second story. Each hourlong episode focuses on one stage of the construction process and showcases the latest construction materials and build techniques.

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.

Personal stories of those caught up in sometimes deadly natural catastrophes, accompanied by camera footage showing meteorological phenomena, including hurricanes, earthquakes, monsoons and more.

Chief Brett Lovegrove, former Head of Counter Terrorism for City of London Police, runs a team of 30 hunters, carefully selected from law enforcement, military intelligence and human tracking; their first fugitive is Dr. Ricky Allen from Kent.

Following marine salvage teams as they race against the clock to recover ships wrecked by fierce storms that rage across the globe.

Two new fugitives, Sikh brothers Harinder and Davinder Singh, travel the UK together; they're aware of the "terrorist" stereotype of Asian men with beards and backpacks, so they mostly still within their community of extended family and friends.

Mike Holmes can fix just about everything. His motto reads: "If you're going to do something, do it right the first time." And that definitely applies to his home renovation work, which is featured in this series as he and his crew rescue homeowners victimized by shoddy contractors. Holmes is a warmhearted, straight-shooting regular guy who tells it like it is, especially when it comes to messy builders and the sloppy, lazy jobs they leave behind.

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.

Mike Holmes can fix just about everything. His motto reads: "If you're going to do something, do it right the first time." And that definitely applies to his home renovation work, which is featured in this series as he and his crew rescue homeowners victimized by shoddy contractors. Holmes is a warmhearted, straight-shooting regular guy who tells it like it is, especially when it comes to messy builders and the sloppy, lazy jobs they leave behind.

Mike Holmes can fix just about everything. His motto reads: "If you're going to do something, do it right the first time." And that definitely applies to his home renovation work, which is featured in this series as he and his crew rescue homeowners victimized by shoddy contractors. Holmes is a warmhearted, straight-shooting regular guy who tells it like it is, especially when it comes to messy builders and the sloppy, lazy jobs they leave behind.

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

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Across North America and the rest of the world, hurricanes, storm surges, earthquakes and sea level rise threaten major cities and lead to natural catastrophes.

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.

Pushing the boundaries of scientific innovation and engineering often results in mind-boggling building achievements. Unfortunately, progress can also produce leaning towers of terror. This series showcases the latter - engineering disasters, from the hilarious to the mind-boggling, from the deadly to the bank-busting. Episodes profile, investigate and analyze outrageous structural gaffes, then tell of genius resolutions to solve the issues. Blunders include an airport that is sinking into the sea, an upside-down bridge, and a waterfront building that creates a dangerous wind tunnel.

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

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

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

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

A grim discovery in a Swedish lake reveals ancient practices; in the Canadian Arctic, the fossil of a previously unknown mammal is found; bizarre ice formations in the Antarctic Ocean; a discovery off the east coast of Canada.

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

In a Danish bog, hundreds of mutilated ancient bones are found, while a mysterious deserted island belonging to Russia is explored.

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

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.

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

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.

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.

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.

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.

Uncover a vast underground city in Turkey that served as a refuge for Christians and Jews. Investigate a mysterious chalk chamber in England, visit a secret Etruscan complex beneath an Italian wine cellar, and map an ancient tunnel network in Iran.

Marvel at the crystal caves and underground chapels of Poland's Wieliczka salt mine. Tour a secret Cold War bunker in England, unearth a 3,400-year-old royal settlement in Egypt, and try to solve the mystery of China's enigmatic Longyou Caves.

Investigate a tomb in Naples that may contain a prince who inspired the legend of Dracula. Read the desperate letters of Jewish rebels hidden in an Israeli cave, tour a 6,000-year-old labyrinth in Malta, and see the oldest human burial in Africa.

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.

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.

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.

Triangle shaped hovering objects are seen by thousands of people and investigated by scientists and government officials, yet they could never be explained; the sightings occurred in a more than two year wave over Belgium, beginning in late 1989.

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.

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.

Witness animal spectacles from high above the Earth; watch a whirling herd of northern nomads; see undersea behemoths show off in the Pacific shallows; track a U.S. porcine stampede; confront top ocean predators on the Florida coast.

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 Jack Osbourne.

Guest comic Keegan-Michael Key.

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.

Look at a secret desert outpost in Utah where men unleashed hell; entering a forgotten Jacksonville church that became a haven; explore third-hand Japanese buildings in New York and the lair of a birdlike beast that tormented a West Virginia town.

Severe flooding forces families across Europe onto their rooftops; a Nepali avalanche; deadly wildfires in the Sierra Nevada; an eastern U.S. whiteout that strands motorists for 24 hours in their cars.

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.

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 Jack Osbourne.

Guest comic Keegan-Michael Key.

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.

Dr. Poitras and her team jump into action when they find an alarming mass on a beloved golden retriever named Rosey; Dr. Cori calms an anxious dog and offers some advice regarding new puppies when she meets an adorable chihuahua named Diesel.

Eshaan Akbar, Jo Brand and Rhys James take a look at vices and virtues.

Sandi and Alan are joined by Jason Manford, Ahir Shah and Holly Walsh to look at veggies.

Sandi and Alan search for victory with Rob Beckett, Daliso Chaponda and Lara Ricote.

Alaskans are forced to embrace their inner warrior as winter deepens.

Dr. Poitras and her team jump into action when they find an alarming mass on a beloved golden retriever named Rosey; Dr. Cori calms an anxious dog and offers some advice regarding new puppies when she meets an adorable chihuahua named Diesel.

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

Sandi and Alan are joined by Jason Manford, Ahir Shah and Holly Walsh to look at veggies.

Sandi and Alan search for victory with Rob Beckett, Daliso Chaponda and Lara Ricote.

Guest comic Jack Osbourne.

Guest comic Keegan-Michael Key.

Severe flooding forces families across Europe onto their rooftops; a Nepali avalanche; deadly wildfires in the Sierra Nevada; an eastern U.S. whiteout that strands motorists for 24 hours in their cars.

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.

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.

Witness animal spectacles from high above the Earth; watch a whirling herd of northern nomads; see undersea behemoths show off in the Pacific shallows; track a U.S. porcine stampede; confront top ocean predators on the Florida coast.

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

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

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.

Triangle shaped hovering objects are seen by thousands of people and investigated by scientists and government officials, yet they could never be explained; the sightings occurred in a more than two year wave over Belgium, beginning in late 1989.

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 comedian Rachel Bloom.

Guest comic Mircea Monroe.

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.

Inspect a rusty boat in Florida that once held boundless treasure; creep around an Indiana house of correction that punished its residents; examine a metal menagerie on the front lines of a foreign attack and an upstate New York comedy incubator.

Vacationers end up trapped in a pool surrounded by fire; a Czech man faces a rare F4 tornado; an animal rescuer works in the aftermath of Hurricane Florence; a kayaker paddles through a pacific storm.

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.

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 comedian Rachel Bloom.

Guest comic Mircea Monroe.

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

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

Examine a Revolutionary War-era ship found in the rubble of the World Trade Center. Uncover a mass grave of Viking settlers in Oxford, visit the resistance bunkers of the Warsaw Ghetto Uprising, and tour a necropolis full of burial jars in Corsica.

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.

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

Examine a Revolutionary War-era ship found in the rubble of the World Trade Center. Uncover a mass grave of Viking settlers in Oxford, visit the resistance bunkers of the Warsaw Ghetto Uprising, and tour a necropolis full of burial jars in Corsica.

Guest comedian Rachel Bloom.

Guest comic Mircea Monroe.

Vacationers end up trapped in a pool surrounded by fire; a Czech man faces a rare F4 tornado; an animal rescuer works in the aftermath of Hurricane Florence; a kayaker paddles through a pacific storm.

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.

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.

Triangle shaped hovering objects are seen by thousands of people and investigated by scientists and government officials, yet they could never be explained; the sightings occurred in a more than two year wave over Belgium, beginning in late 1989.

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.

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.

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.

Students in Australia witness a saucer-shaped object touch down; a man's car and cell phone stop working when a cigar-shaped object passes overhead.

A teen views a mushroom-shaped object that leaves a glowing ring on the ground; police officers witness a large triangular object.

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.

Wayne Brady, Ryan Stiles Colin Mochrie and guest performer Greg Proops are joined by star guest Kat Graham to put their comedic skills to the test through a series of spontaneous improv games.

A special episode featuring a compilation of games, moments, and outtakes of never-before-seen footage.

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.

Scattered across the United States are abandoned structures, forgotten ruins of the past and monuments to a bygone era that reveal the secrets of a hidden America.

An Australian family washed out of their off-grid home by flash floods; a woman crashes through the ice trying to save her dog; a golf course tornado; an adventurer injured in a freak rainstorm in British Columbia.

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.

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.

Wayne Brady, Ryan Stiles Colin Mochrie and guest performer Greg Proops are joined by star guest Kat Graham to put their comedic skills to the test through a series of spontaneous improv games.

A special episode featuring a compilation of games, moments, and outtakes of never-before-seen footage.

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.

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

In the jungles of southern Mexico, a rancher discovers dozens of skulls and bones on a cave floor; strange grass-covered domes are investigated in the Philippines; archaeologists uncover carved stone figures on the Hawaiian island of Kauai.

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

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

In the jungles of southern Mexico, a rancher discovers dozens of skulls and bones on a cave floor; strange grass-covered domes are investigated in the Philippines; archaeologists uncover carved stone figures on the Hawaiian island of Kauai.

Wayne Brady, Ryan Stiles Colin Mochrie and guest performer Greg Proops are joined by star guest Kat Graham to put their comedic skills to the test through a series of spontaneous improv games.

A special episode featuring a compilation of games, moments, and outtakes of never-before-seen footage.

An Australian family washed out of their off-grid home by flash floods; a woman crashes through the ice trying to save her dog; a golf course tornado; an adventurer injured in a freak rainstorm in British Columbia.

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

Students in Australia witness a saucer-shaped object touch down; a man's car and cell phone stop working when a cigar-shaped object passes overhead.

A teen views a mushroom-shaped object that leaves a glowing ring on the ground; police officers witness a large triangular object.

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.

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.

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.

Fugitive Nick begins his tentative journey by bicycle; teammates Anna and Elizabeth head off to the countryside; amputee veterans Kirk and Jeremy waste no time in their daring mission.

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.

Guest comic Jack Osbourne.

Guest comic Keegan-Michael Key.

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 research facility spawns new technology with earth-shattering implications; a coastal haven for African Americans changes the nation; a forgotten fortress fights off a Nazi submarine; a staunch building stands firm on San Francisco's darkest day.

Wind-fuelled blazes in a snow-blanketed Colorado town; stranded restaurant workers in frigid temperatures; a flash flood rages beneath a family's truck; over 40 twisters over two days in Alabama.

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.

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.

A compilation of games, moments, and outtakes of never-before-seen footage.

A special episode featuring a compilation of games, moments and outtakes of never-before-seen footage.

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.

Featuring Graham trading quips with Taylor Swift, Cillian Murphy, Greta Lee, Jodie Turner-Smith, Domhnall Gleeson and Lewis Capaldi.

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

Special guests Penn & Teller.

Guest comic Jack Osbourne.

Featuring Graham trading quips with Taylor Swift, Cillian Murphy, Greta Lee, Jodie Turner-Smith, Domhnall Gleeson and Lewis Capaldi.

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

Special guests Penn & Teller.

Guest comic Mircea Monroe.

Wind-fuelled blazes in a snow-blanketed Colorado town; stranded restaurant workers in frigid temperatures; a flash flood rages beneath a family's truck; over 40 twisters over two days in Alabama.

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.

Examine a Revolutionary War-era ship found in the rubble of the World Trade Center. Uncover a mass grave of Viking settlers in Oxford, visit the resistance bunkers of the Warsaw Ghetto Uprising, and tour a necropolis full of burial jars in Corsica.

A devastating river of mud and rocks threatens a sleepy mountain valley; bizarre patterns beneath a frozen river may be strange morphing creatures; a jellyfish-shaped cloud may be a sign of dangerous weather to come.

Zac and Darin get down and dirty as they explore a natural approach to farming through regenerative agriculture and organic food production.

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

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 comedian Rachel Bloom.

Paid programming.

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

Examine a Revolutionary War-era ship found in the rubble of the World Trade Center. Uncover a mass grave of Viking settlers in Oxford, visit the resistance bunkers of the Warsaw Ghetto Uprising, and tour a necropolis full of burial jars in Corsica.

Featuring Graham trading quips with Taylor Swift, Cillian Murphy, Greta Lee, Jodie Turner-Smith, Domhnall Gleeson and Lewis Capaldi.

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

Eshaan Akbar, Jo Brand and Rhys James take a look at vices and virtues.

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

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

Fire up another heat of competition as the players try to tease out which of Rick's answers are not just wrong but actually impossible; hang tight through three tense rounds and see who is left standing to face the 10,000-pound exclamation point.

Eshaan Akbar, Jo Brand and Rhys James take a look at vices and virtues.

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

Examine a Revolutionary War-era ship found in the rubble of the World Trade Center. Uncover a mass grave of Viking settlers in Oxford, visit the resistance bunkers of the Warsaw Ghetto Uprising, and tour a necropolis full of burial jars in Corsica.

Unable to accept the fact that her daughter is dying, Rose (Radha Mitchell) decides to take the girl to a faith healer. On the way, the pair drive through a portal in reality, leading to an eerie town called Silent Hill. The town is surrounded by a potent darkness, and the human survivors fight a losing battle against it.

Guest comedian Rachel Bloom.

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

Examine a Revolutionary War-era ship found in the rubble of the World Trade Center. Uncover a mass grave of Viking settlers in Oxford, visit the resistance bunkers of the Warsaw Ghetto Uprising, and tour a necropolis full of burial jars in Corsica.

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.

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

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

A cat named Louis requires major leg surgery, a Kunekune pig named Crumbfoot needs emergency X-rays, and Savannah heads out to conduct a wild horse study, looking at how horses treat their own parasites through a process known as Zoopharmacognosy.

A guinea pig named JT has a life-threatening tooth issue, a duck named Dick has a septic joint that needs cleaning, and Savannah and Dayle head to La Ronge, SK. to speak to a class of high schoolers and mentor the next generation of veterinarians.

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.

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

Examine a Revolutionary War-era ship found in the rubble of the World Trade Center. Uncover a mass grave of Viking settlers in Oxford, visit the resistance bunkers of the Warsaw Ghetto Uprising, and tour a necropolis full of burial jars in Corsica.

Guest comic Mircea Monroe.

Paid programming.

Triangle shaped hovering objects are seen by thousands of people and investigated by scientists and government officials, yet they could never be explained; the sightings occurred in a more than two year wave over Belgium, beginning in late 1989.

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

Wayne Brady, Ryan Stiles Colin Mochrie and guest performer Greg Proops are joined by star guest Kat Graham to put their comedic skills to the test through a series of spontaneous improv games.

A special episode featuring a compilation of games, moments, and outtakes of never-before-seen footage.

Sandi and Alan are joined by Jason Manford, Ahir Shah and Holly Walsh to look at veggies.

Sandi and Alan search for victory with Rob Beckett, Daliso Chaponda and Lara Ricote.

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.

Alaskans are forced to embrace their inner warrior as winter deepens.

Examine a Revolutionary War-era ship found in the rubble of the World Trade Center. Uncover a mass grave of Viking settlers in Oxford, visit the resistance bunkers of the Warsaw Ghetto Uprising, and tour a necropolis full of burial jars in Corsica.

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.

U.S. Navy veteran turned private investigator Jennifer Marshall and paranormal researcher Heidi Hollis investigate a series of mysterious encounters with an unknown creature in the Bluegrass hills of Kentucky.

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.

Sign off.

U.S. Navy veteran turned private investigator Jennifer Marshall and paranormal researcher Heidi Hollis investigate a series of mysterious encounters with an unknown creature in the Bluegrass hills of Kentucky.

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.

Alaskans are forced to embrace their inner warrior as winter deepens.

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.

U.S. Navy veteran turned private investigator Jennifer Marshall and paranormal researcher Heidi Hollis investigate a series of mysterious encounters with an unknown creature in the Bluegrass hills of Kentucky.

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

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.

An elderly dog named Layne needs tests to see if she's stable enough for surgery; a cow suffers from a prolapsed uterus; Lil shows up with a couple of creatures that need the team's help before they can be released back into the wild.

A cat named Lovebug requires emergency surgery after being shot in the leg; a Pomeranian named Cheeka has a bad cough; Savannah and Dayle take a trip to learn some horse-handling skills from a well-known Métis expert.

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 jungles of southern Mexico, a rancher discovers dozens of skulls and bones on a cave floor; strange grass-covered domes are investigated in the Philippines; archaeologists uncover carved stone figures on the Hawaiian island of Kauai.

Soldiers encounter a luminous triangular-shaped craft in an English field; witnesses report a metallic object hovering over water.

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

Take your pick when Rick reveals the right, wrong, and totally impossible answers to the contestants; discover if any of these bright competitors have what it takes to weed out the wrong info and take a crack at the 10,000 pound jackpot.

A special episode featuring a compilation of games, moments and outtakes of never-before-seen footage.

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.

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.

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

A massive typhoon in the Philippines; a record-breaking California wildfire; a submerged house; a lost snowboarder spends an icy night facing bears and deadly frostbite.

In the jungles of southern Mexico, a rancher discovers dozens of skulls and bones on a cave floor; strange grass-covered domes are investigated in the Philippines; archaeologists uncover carved stone figures on the Hawaiian island of Kauai.

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.

A special episode featuring a compilation of games, moments and outtakes of never-before-seen footage.

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.

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.