An unidentified metal object is found on Kiska Island; a centuries-old gold mining mystery is investigated; in Siberia, a network of ice tunnels is explored; fossils unearthed in the Canadian Arctic lead to the discovery of a new species.

A vacationing family films waves of fire breaking along the shores of an Indonesian island; experts investigate a possible connection to a classified WWII beach-burning weapon developed by the British to incinerate invading armies.

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

A tornado tears a mile-wide path through the American town of Moore, Okla., destroying two schools while the pupils are inside.

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

A Revolutionary leader visits Alabama's first capital and leaves it bankrupt; an Oregon fort refuses to engage an enemy submarine during World War II; a film studio in Jacksonville, Fla. caters to a new audience.

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.

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

With the year now completed, the kelpie siblings reunite for their final herding test.

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.

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

Exploring the stories behind mankind's greatest engineering disasters through archives and expert interviews.

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.

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

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.

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

Navigating an Arizona border town where soldiers fought between two worlds; seeing a revolutionary mountain hideaway in New York; touring an American icon's dilapidated birthplace; viewing an Alaskan monument to natural-resource exploitation.

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

A trio makes a daring escape from "the Rock"; a U.S. representative's plane vanishes in Alaska; a giant spiral in the sky stuns Norway.

Navigating an Arizona border town where soldiers fought between two worlds; seeing a revolutionary mountain hideaway in New York; touring an American icon's dilapidated birthplace; viewing an Alaskan monument to natural-resource exploitation.

Martin Freeman and Erin Doherty join Graham on his sofa; with music from singer-songwriter Olivia Dean.

Be an eyewitness during a small plane crash, meet an adventurous Isle of Wight resident, and see four Yorkshire snowboarders narrowly escape danger. Then find out if a cuddly toy pooch makes it safely back to Earth after being shot into space.

House-decimating floods in British Columbia; speeding away from a lethal cliff collapse with boaters vacationing in Brazil; two men ditch their car during a hurricane; an Oregon farm razed by a wildfire.

Martin Freeman and Erin Doherty join Graham on his sofa; with music from singer-songwriter Olivia Dean.

Be an eyewitness during a small plane crash, meet an adventurous Isle of Wight resident, and see four Yorkshire snowboarders narrowly escape danger. Then find out if a cuddly toy pooch makes it safely back to Earth after being shot into space.

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

Sandi Toksvig looks at pathology with Sindhu Vee, Rhod Gilbert, Ed Byrne and Alan Davies.

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

A trio makes a daring escape from "the Rock"; a U.S. representative's plane vanishes in Alaska; a giant spiral in the sky stuns Norway.

Navigating an Arizona border town where soldiers fought between two worlds; seeing a revolutionary mountain hideaway in New York; touring an American icon's dilapidated birthplace; viewing an Alaskan monument to natural-resource exploitation.

Hunt for the Amber Room, a Nazi-looted treasure that disappeared in 1944; track the final flight of bandleader Glenn Miller over the English Channel, then re-examine the arrest of Anne Frank to see if she was betrayed or a victim of coincidence.

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.

Rethink what it's known about death and preservation; see why Denmark's perfectly preserved Tollund Man raises questions, observe Portuguese bodies that rewrite history, and uncover the mystery of Scotland's Frankenstein mummies.

Hunt for the Amber Room, a Nazi-looted treasure that disappeared in 1944; track the final flight of bandleader Glenn Miller over the English Channel, then re-examine the arrest of Anne Frank to see if she was betrayed or a victim of coincidence.

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.

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.

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

Paid programming.

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

With the year now completed, the kelpie siblings reunite for their final herding test.

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

Experience the day-to-day drama of life in New Zealand's biggest doggy daycare.

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

Be an eyewitness during a small plane crash, meet an adventurous Isle of Wight resident, and see four Yorkshire snowboarders narrowly escape danger. Then find out if a cuddly toy pooch makes it safely back to Earth after being shot into space.

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.

Martin Freeman and Erin Doherty join Graham on his sofa; with music from singer-songwriter Olivia Dean.

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

Sandi Toksvig looks at pathology with Sindhu Vee, Rhod Gilbert, Ed Byrne and Alan Davies.

Be an eyewitness during a small plane crash, meet an adventurous Isle of Wight resident, and see four Yorkshire snowboarders narrowly escape danger. Then find out if a cuddly toy pooch makes it safely back to Earth after being shot into space.

Swing into action when a drought exposes rare Australian boomerangs and check out a Nazi weapon cache after a flood rips through Germany. Ponder mysterious petroglyphs in Montserrat, then see evidence of Iron Age life in Scotland's Outer Hebrides.

A vacationing family films waves of fire breaking along the shores of an Indonesian island; experts investigate a possible connection to a classified WWII beach-burning weapon developed by the British to incinerate invading armies.

Scientists uncover a city, a chamber, and a complex, and map a tunnel network.

Trace the source of a colossal explosion in Beirut and decode a deadly bomb cyclone that buried Buffalo in snow. Watch explosive ash from an Icelandic volcano halt global travel, then see a monstrous typhoon over Vietnam defy the laws of science.

Swing into action when a drought exposes rare Australian boomerangs and check out a Nazi weapon cache after a flood rips through Germany. Ponder mysterious petroglyphs in Montserrat, then see evidence of Iron Age life in Scotland's Outer Hebrides.

A trio makes a daring escape from "the Rock"; a U.S. representative's plane vanishes in Alaska; a giant spiral in the sky stuns Norway.

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.

Be an eyewitness during a small plane crash, meet an adventurous Isle of Wight resident, and see four Yorkshire snowboarders narrowly escape danger. Then find out if a cuddly toy pooch makes it safely back to Earth after being shot into space.

Rethink what it's known about death and preservation; see why Denmark's perfectly preserved Tollund Man raises questions, observe Portuguese bodies that rewrite history, and uncover the mystery of Scotland's Frankenstein mummies.

Explore a covert mission to recover a sunken Soviet submarine packed with Cold War secrets, then examine a disastrous wartime weapon. See how these forgotten discoveries helped shape the rise of the internet and influence self-driving technology.

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

Swing into action when a drought exposes rare Australian boomerangs and check out a Nazi weapon cache after a flood rips through Germany. Ponder mysterious petroglyphs in Montserrat, then see evidence of Iron Age life in Scotland's Outer Hebrides.

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.

Trace the source of a colossal explosion in Beirut and decode a deadly bomb cyclone that buried Buffalo in snow. Watch explosive ash from an Icelandic volcano halt global travel, then see a monstrous typhoon over Vietnam defy the laws of science.

Sandi Toksvig looks at pathology with Sindhu Vee, Rhod Gilbert, Ed Byrne and Alan Davies.

Paid programming.

Rethink what it's known about death and preservation; see why Denmark's perfectly preserved Tollund Man raises questions, observe Portuguese bodies that rewrite history, and uncover the mystery of Scotland's Frankenstein mummies.

An unidentified metal object is found on Kiska Island; a centuries-old gold mining mystery is investigated; in Siberia, a network of ice tunnels is explored; fossils unearthed in the Canadian Arctic lead to the discovery of a new species.

Scientists uncover a city, a chamber, and a complex, and map a tunnel network.

Swing into action when a drought exposes rare Australian boomerangs and check out a Nazi weapon cache after a flood rips through Germany. Ponder mysterious petroglyphs in Montserrat, then see evidence of Iron Age life in Scotland's Outer Hebrides.

A young recruit encounters aliens in the Nevada desert in the 1960s; he claims they were working with the US military and housed a spaceship in a secret hangar nearby.

Be an eyewitness during a small plane crash, meet an adventurous Isle of Wight resident, and see four Yorkshire snowboarders narrowly escape danger. Then find out if a cuddly toy pooch makes it safely back to Earth after being shot into space.

Alaskans face uncertainty in their quest to thrive in the warm season.

Trace the source of a colossal explosion in Beirut and decode a deadly bomb cyclone that buried Buffalo in snow. Watch explosive ash from an Icelandic volcano halt global travel, then see a monstrous typhoon over Vietnam defy the laws of science.

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

The investigative documentary series "Mysteries Decoded" delves deep into some of America's greatest unsolved mysteries, exploring newly discovered evidence and utilizing high-tech tools in each case. From Area 51 to the Salem witch trials, each episode's investigation is coordinated by Jennifer Marshall, an accomplished U.S. Navy veteran turned top-notch private investigator, as she mobilizes her team to embark on the formidable quest to bring closure to these long-lingering historical puzzles.

In the depths of winter, the NWS homesteaders look to the land for precious resources.

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

The investigative documentary series "Mysteries Decoded" delves deep into some of America's greatest unsolved mysteries, exploring newly discovered evidence and utilizing high-tech tools in each case. From Area 51 to the Salem witch trials, each episode's investigation is coordinated by Jennifer Marshall, an accomplished U.S. Navy veteran turned top-notch private investigator, as she mobilizes her team to embark on the formidable quest to bring closure to these long-lingering historical puzzles.

In the depths of winter, the NWS homesteaders look to the land for precious resources.

Trace the source of a colossal explosion in Beirut and decode a deadly bomb cyclone that buried Buffalo in snow. Watch explosive ash from an Icelandic volcano halt global travel, then see a monstrous typhoon over Vietnam defy the laws of science.

Hunt for the Amber Room, a Nazi-looted treasure that disappeared in 1944; track the final flight of bandleader Glenn Miller over the English Channel, then re-examine the arrest of Anne Frank to see if she was betrayed or a victim of coincidence.

The investigative documentary series "Mysteries Decoded" delves deep into some of America's greatest unsolved mysteries, exploring newly discovered evidence and utilizing high-tech tools in each case. From Area 51 to the Salem witch trials, each episode's investigation is coordinated by Jennifer Marshall, an accomplished U.S. Navy veteran turned top-notch private investigator, as she mobilizes her team to embark on the formidable quest to bring closure to these long-lingering historical puzzles.

A trio makes a daring escape from "the Rock"; a U.S. representative's plane vanishes in Alaska; a giant spiral in the sky stuns Norway.

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.

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

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

A 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.

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

Dr. Cori taps into her wealth of experience to bring Ranger, the ailing cat, back from a life-or-death situation; in Saskatoon, a lost kitty gets a clean bill of health and finds a loving home with one of Dr. Allison's team members.

Paid programming.

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

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

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

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

A strange structure in New York becomes a testing ground for Nazi technology; a thriving amusement park is laid to ruins by an unstoppable force of nature; an island becomes a major player in a controversial industry.

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.

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

A strange structure in New York becomes a testing ground for Nazi technology; a thriving amusement park is laid to ruins by an unstoppable force of nature; an island becomes a major player in a controversial industry.

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

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

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

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

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

Experts study what caused Kegworth air disaster in 1989 and the tragic Concorde crash in 2000; examine what the consequences were and how they could have been avoided.

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

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

A strange structure in New York becomes a testing ground for Nazi technology; a thriving amusement park is laid to ruins by an unstoppable force of nature; an island becomes a major player in a controversial industry.

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

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.

In the depths of winter, the NWS homesteaders look to the land for precious resources.

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.

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

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

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.

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.

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

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

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.

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

Asking if the seemingly miraculous parting of the Red Sea could be explained as a natural event; a famous bridge collapses in Italy; hundreds of whales are driven onto beaches around the world.

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.

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

Hunt for a home for Rottie Nina after Zoya's kitchen raids take a deadly turn.

Debbie and Snip become the mother and father of the newborn litter of pups in Goondy Creek, NSW; these pups are sent to five Australian graziers, who will each attempt to train their pup in less than a year.

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

Dachshund siblings Link and Kirby cause some giggles with a peculiar problem; senior dog Samson has a painful eye that requires major surgery; Dr. Poitras connects with community at the Enoch Indian Horse Relay and meets a young rider with big grit.

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

Hunt for a home for Rottie Nina after Zoya's kitchen raids take a deadly turn.

Debbie and Snip become the mother and father of the newborn litter of pups in Goondy Creek, NSW; these pups are sent to five Australian graziers, who will each attempt to train their pup in less than a year.

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

Dachshund siblings Link and Kirby cause some giggles with a peculiar problem; senior dog Samson has a painful eye that requires major surgery; Dr. Poitras connects with community at the Enoch Indian Horse Relay and meets a young rider with big grit.

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

Asking if the seemingly miraculous parting of the Red Sea could be explained as a natural event; a famous bridge collapses in Italy; hundreds of whales are driven onto beaches around the world.

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.

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

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.

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

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.

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.

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

Paid programming.

Dr. Allison's clinic is full of nerves and worry as she and her staff bring in their own animals for vet care; Dr. Emma picks up some tips for working with small companion animals from Calgary's top exotic vet specialist.

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.

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.

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.

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

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.

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.

A deadly balloon bomb threatens the Manhattan Project during World War II; India is rocked by unexpected Himalayan floods outside monsoon season; a pandemic shuts down the world.

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.

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

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

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.

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

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

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

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

A deadly balloon bomb threatens the Manhattan Project during World War II; India is rocked by unexpected Himalayan floods outside monsoon season; a pandemic shuts down the world.

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.

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

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

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

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.

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

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.

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

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

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.

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.