Known for their seafaring skills and feared for their ferocity, the Vikings amassed gold, silver and other riches while trading and raiding across Europe; catches of this treasure have been found in Europe and North America, but this may be just the tip of the iceberg; are there any rich Viking hoards still waiting to be found? And if so, where are they?

High above the Giza Plateau stands Egypt's most mysterious ancient site: the Lost Pyramid of Abu Rawash; today, it lies in ruins, but some researchers believe these stone blocks hold profound secrets about an extraterrestrial civilization that existed in ancient Egypt long before our recorded history.

Could the sacred encounters that shaped millennia of faith-and the warnings delivered by modern contactees-be part of the same phenomenon: misunderstood interactions with advanced beings from beyond our world?

An event outside a U.S. Air Force base near the Rendlesham Forest in England becomes an international legend, and one of history's strangest unidentified encounters; for more than 40 years, the question has endured.

Col. Potter is overwhelmed by the attention he receives as his staff tries to reduce his blood pressure before his annual physical.

Hawkeye is overcome by a mysterious bout of nonstop sneezing.

Angela and Dave need to transport a tiny home from Saskatchewan to British Columbia in time for a wedding; Dave's obsessed with a military rotator that would expand his business, but he can't afford it unless he makes a devilish deal with Big Donny.

Logger Kevin Wenstob's best day ever turns into his worst, when a sudden disaster threatens to shut down his timber claim and his sawmill.

Joel builds a huge house for a client he's never met; Peter plays the role of a lifetime.

Angela and Dave need to transport a tiny home from Saskatchewan to British Columbia in time for a wedding; Dave's obsessed with a military rotator that would expand his business, but he can't afford it unless he makes a devilish deal with Big Donny.

Logger Kevin Wenstob's best day ever turns into his worst, when a sudden disaster threatens to shut down his timber claim and his sawmill.

Two travelers on a world tour are questioned about their packs, plans and partygoing; at Port Huron, a woman hoping to meet her boyfriend for the first time is scrutinized over the contents in her car.

In Boston, CPB stick their necks out to ask about a bottle of ostrich oil; in Detroit, a Canadian law student must explain why her car smells like marijuana.

Hawkeye must tell a wounded soldier that tests indicate he has chronic leukemia and can't give blood to his best buddy.

A letter from Radar brightens the colonel's day until Klinger accidentally breaks his glasses.

When secrecy can be the key to survival, codebreaking becomes a battlefield of its own. A stranded American pilot in Vietnam is rescued through a code built around familiar golf courses, while Navajo Code Talkers transmit messages that help turn the tide in the Pacific during World War II. David Duchovny breaks down every breakthrough where a strategist turned language into leverage.

Is it possible that Apollo 16 astronauts witnessed a UFO during a trip to the Moon?; did an alien craft leave a pattern of burns on a man's body?; are perfectly carved stone spheres discovered in Bosnia proof of extraterrestrials?

In an all-UFO special episode, Tony Harris breaks down the latest developments and most compelling photographic evidence in a tumultuous year of UFO revelations.

Exploring if a retired Army aviation officer uncovered evidence of intelligent anomalies or technosignatures, in NASA archived solar satellite photos; why a giant shark caught on camera sparked a debate about if megalodons still exist and more.

Hawkeye must tell a wounded soldier that tests indicate he has chronic leukemia and can't give blood to his best buddy.

A letter from Radar brightens the colonel's day until Klinger accidentally breaks his glasses.

Is it possible that Apollo 16 astronauts witnessed a UFO during a trip to the Moon?; did an alien craft leave a pattern of burns on a man's body?; are perfectly carved stone spheres discovered in Bosnia proof of extraterrestrials?

Known for their seafaring skills and feared for their ferocity, the Vikings amassed gold, silver and other riches while trading and raiding across Europe; catches of this treasure have been found in Europe and North America, but this may be just the tip of the iceberg; are there any rich Viking hoards still waiting to be found? And if so, where are they?

When secrecy can be the key to survival, codebreaking becomes a battlefield of its own. A stranded American pilot in Vietnam is rescued through a code built around familiar golf courses, while Navajo Code Talkers transmit messages that help turn the tide in the Pacific during World War II. David Duchovny breaks down every breakthrough where a strategist turned language into leverage.

Did a backyard stargazer capture video of UFOs over Chattanooga, Tennessee? Has the biblical Ark of the Covenant been discovered in a cave? Could a cathedral in Germany be the key to 300 years of history vanishing? And what's behind the mysterious phenomenon known as earthquake lights? Tony Harris and his team of experts analyze the video evidence to find the truth.

From a hidden cache of bones, to an ancient tomb shrouded in mystery and even a rare sports car dug up in a backyard; these eerie revelations prove that some secrets refuse to stay buried.

When secrecy can be the key to survival, codebreaking becomes a battlefield of its own. A stranded American pilot in Vietnam is rescued through a code built around familiar golf courses, while Navajo Code Talkers transmit messages that help turn the tide in the Pacific during World War II. David Duchovny breaks down every breakthrough where a strategist turned language into leverage.

Did a backyard stargazer capture video of UFOs over Chattanooga, Tennessee? Has the biblical Ark of the Covenant been discovered in a cave? Could a cathedral in Germany be the key to 300 years of history vanishing? And what's behind the mysterious phenomenon known as earthquake lights? Tony Harris and his team of experts analyze the video evidence to find the truth.

From a hidden cache of bones, to an ancient tomb shrouded in mystery and even a rare sports car dug up in a backyard; these eerie revelations prove that some secrets refuse to stay buried.

Is it possible that Apollo 16 astronauts witnessed a UFO during a trip to the Moon?; did an alien craft leave a pattern of burns on a man's body?; are perfectly carved stone spheres discovered in Bosnia proof of extraterrestrials?

In an all-UFO special episode, Tony Harris breaks down the latest developments and most compelling photographic evidence in a tumultuous year of UFO revelations.

Exploring if a retired Army aviation officer uncovered evidence of intelligent anomalies or technosignatures, in NASA archived solar satellite photos; why a giant shark caught on camera sparked a debate about if megalodons still exist and more.

Hawkeye must tell a wounded soldier that tests indicate he has chronic leukemia and can't give blood to his best buddy.

A letter from Radar brightens the colonel's day until Klinger accidentally breaks his glasses.

Dave and Angela are forced to put a recovery job with his new army rotator on hold, when they get a rescue call from a dangerous mountain trail; Dale and Craig renew their bad blood while on a mission together at a remote fire watchtower.

Kevin faces disasters everywhere; his logging operation is shut down, his main client threatens to walk, and he locks horns with his right-hand man.

Beat's schedule is thrown by German customs; Bryan Sr. and Peter harvest 200-foot trees.

Dave and Angela are forced to put a recovery job with his new army rotator on hold, when they get a rescue call from a dangerous mountain trail; Dale and Craig renew their bad blood while on a mission together at a remote fire watchtower.

Kevin faces disasters everywhere; his logging operation is shut down, his main client threatens to walk, and he locks horns with his right-hand man.

A dentist from Kiev hopes for an extended stay in the U.S. after fleeing war in her home country; at the Detroit Border, a case of mistaken identity causes alarm; in Chicago, a metaphysical healer wishes a CBP officer good vibes.

A dentist from Kiev hopes for an extended stay in the U.S. after fleeing war in her home country; a traveler headed to Vegas points to a friend as the source of the extra cash he's carrying.

Charles becomes obsessed with death following a sniper attack.

The sudden illness of a USO singer brings the touring troupe to the 4077th.

Remember when "everybody's doing it" was the reason enough to dive in headfirst?; from gravity-defying flagpole sitting and phone booth cramming, to pet skunks and goldfish gulpers, revealing the crazes that are sweeping the nation; these obsessions are risky and impossible to resist; it is a trip back to the fads that push the limits and make hazardous history must-see mayhem.

France and America compete to build a path just 50 miles long that will connect the Atlantic and Pacific oceans; it will cost 30,000 lives, $600 million dollars, and require overcoming many obstacles.

Visionary engineers in New York and Boston vie to build the first subway system in America, but must overcome unprecedented engineering challenges, deadly accidents, fierce political infighting, and the public's fear of the underground.

A century before the Internet, two brave visionaries, Collin Perry and Cyrus Field, endure failure and heartache while risking everything to connect the United States to the rest of the world with a cable under the ocean.

Charles becomes obsessed with death following a sniper attack.

The sudden illness of a USO singer brings the touring troupe to the 4077th.

Two pizza juggernauts expand their empires as a new contender turns the fight into a three-way race to become America's big pizza chain; they push the limits with promotions, creations and inventive sides, only to discover a fourth chain charging onto the battlefield.

From a hidden cache of bones, to an ancient tomb shrouded in mystery and even a rare sports car dug up in a backyard; these eerie revelations prove that some secrets refuse to stay buried.

Remember when "everybody's doing it" was the reason enough to dive in headfirst?; from gravity-defying flagpole sitting and phone booth cramming, to pet skunks and goldfish gulpers, revealing the crazes that are sweeping the nation; these obsessions are risky and impossible to resist; it is a trip back to the fads that push the limits and make hazardous history must-see mayhem.

Rival cereal giants race to invent the next must-have bowl, sparking a sugary arms race of mascots, crunch, candy and the first ever chocolate cereal.

Remember when looking your best meant risking life and limb?; from dentures that could explode at the dinner table and stiff shirt collars that strangled people to death, to toxic hair implants and tanning pills that left them glowing orange.

Two pizza juggernauts expand their empires as a new contender turns the fight into a three-way race to become America's big pizza chain; they push the limits with promotions, creations and inventive sides, only to discover a fourth chain charging onto the battlefield.

Rival cereal giants race to invent the next must-have bowl, sparking a sugary arms race of mascots, crunch, candy and the first ever chocolate cereal.

Remember when looking your best meant risking life and limb?; from dentures that could explode at the dinner table and stiff shirt collars that strangled people to death, to toxic hair implants and tanning pills that left them glowing orange.

France and America compete to build a path just 50 miles long that will connect the Atlantic and Pacific oceans; it will cost 30,000 lives, $600 million dollars, and require overcoming many obstacles.

Visionary engineers in New York and Boston vie to build the first subway system in America, but must overcome unprecedented engineering challenges, deadly accidents, fierce political infighting, and the public's fear of the underground.

A century before the Internet, two brave visionaries, Collin Perry and Cyrus Field, endure failure and heartache while risking everything to connect the United States to the rest of the world with a cable under the ocean.

Charles becomes obsessed with death following a sniper attack.

The sudden illness of a USO singer brings the touring troupe to the 4077th.

Dave ropes Craig into a massive snowcat move but rising tensions threaten to upend the job; Dale races to conquer a precarious mountain road to make an important delivery; Angela fights for traction in slick winter conditions.

Logger Kevin Wenstob is forced to make a tough call to make up for lost time on his mountainside timber claim.

Beat sets logs in the rain; a priest convinces Bryan Sr. and Peter to build a gazebo for free; André and Joel take a float plane to buy $500,000 worth of logs.

Dave ropes Craig into a massive snowcat move but rising tensions threaten to upend the job; Dale races to conquer a precarious mountain road to make an important delivery; Angela fights for traction in slick winter conditions.

Logger Kevin Wenstob is forced to make a tough call to make up for lost time on his mountainside timber claim.

A Canadian landscaper forgets to tell CBP about his imminent flight; a trucker's day goes sideways when he makes a wrong turn and ends up at the border; at Chicago O'Hare a traveler is irate when he's taken to secondary.

A traveler with bags full of counterfeit merchandise isn't bothered by CBP's probing questions; a woman crossing the border finds herself in a salty situation; a journalist hoping to visit the US on vacation is interviewed about his work prospects.

The ailing USO singer undergoes emergency surgery as the troupe entertains the camp.

The problems of three wounded soldiers disrupt the lives of those around them.

The Viking's fearless ability to launch devastating raids across vast distances make him an elite force from the late 8th century to the mid-11th century; armed with axe and sword, he uses both strength and strategy to dominate his enemies.

The guys encounter bullet ants and flesh-eating piranha; after hours of pain from the bullet ant, Caveman Rob dips his blood-covered arm in a tank of piranhas.

Adam and Caveman Rob wrap up in Indonesia with the two worst bites to date from a Giant Asian Centipede and a 16-foot Reticulated Python; vomiting, stitches, and rivers of blood make them ask if they are able to continue their research.

The crew finds out that the swamp may be manmade.

The ailing USO singer undergoes emergency surgery as the troupe entertains the camp.

The problems of three wounded soldiers disrupt the lives of those around them.

The Viking's fearless ability to launch devastating raids across vast distances make him an elite force from the late 8th century to the mid-11th century; armed with axe and sword, he uses both strength and strategy to dominate his enemies.

Rival cereal giants race to invent the next must-have bowl, sparking a sugary arms race of mascots, crunch, candy and the first ever chocolate cereal.

Remember when looking your best meant risking life and limb?; from dentures that could explode at the dinner table and stiff shirt collars that strangled people to death, to toxic hair implants and tanning pills that left them glowing orange.

The team ride into the Wild West for deals; Chum and Corey don their boots to check out a collection of Tanya Tucker worn items; a rare gold and silver Remington Arms gun pops into the shop; Corey encounters a vintage McClellan saddle.

On the final day of gator season, with record-low water turning the swamp into a tough battleground in memory, every team races against the clock to tag out before sunset; Troy and Pickle grind through bad conditions; Jacob and Little Willie lean on family tradition and a treble hook to haul in monster after monster; Bruce and Anna refuse to quit on Six Mile Lake; Don and Calum battle doubt and falling water levels to prove their worth; Leron and Porkchop come up empty.

The Viking's fearless ability to launch devastating raids across vast distances make him an elite force from the late 8th century to the mid-11th century; armed with axe and sword, he uses both strength and strategy to dominate his enemies.

The team ride into the Wild West for deals; Chum and Corey don their boots to check out a collection of Tanya Tucker worn items; a rare gold and silver Remington Arms gun pops into the shop; Corey encounters a vintage McClellan saddle.

On the final day of gator season, with record-low water turning the swamp into a tough battleground in memory, every team races against the clock to tag out before sunset; Troy and Pickle grind through bad conditions; Jacob and Little Willie lean on family tradition and a treble hook to haul in monster after monster; Bruce and Anna refuse to quit on Six Mile Lake; Don and Calum battle doubt and falling water levels to prove their worth; Leron and Porkchop come up empty.

The guys encounter bullet ants and flesh-eating piranha; after hours of pain from the bullet ant, Caveman Rob dips his blood-covered arm in a tank of piranhas.

Adam and Caveman Rob wrap up in Indonesia with the two worst bites to date from a Giant Asian Centipede and a 16-foot Reticulated Python; vomiting, stitches, and rivers of blood make them ask if they are able to continue their research.

The crew finds out that the swamp may be manmade.

The ailing USO singer undergoes emergency surgery as the troupe entertains the camp.

The problems of three wounded soldiers disrupt the lives of those around them.

Historic flood waters slam the region, stranding Junior and forcing Big Donny's new hires to step up on a mountain-side tow recovery; Dale needs a helping hand to keep his fledgling business alive.

Kevin and his wife Sarah take on a special order; they need to find a one-in-a-million fir tree for a sailing school that is rebuilding a rare replica of a 1778-era schooner.

André goes to Ontario to lead his first build in six years; Beat has to collaborate; Peter is determined to get a vacation out of Bryan Jr.

Historic flood waters slam the region, stranding Junior and forcing Big Donny's new hires to step up on a mountain-side tow recovery; Dale needs a helping hand to keep his fledgling business alive.

Kevin and his wife Sarah take on a special order; they need to find a one-in-a-million fir tree for a sailing school that is rebuilding a rare replica of a 1778-era schooner.

Two women returning from a tropical vacation are questioned; at JFK cargo facility, a bounty of gold jewelry is apprehended when the manifesto seems to sell its value short; Bailey the dog has a big day.

A traveler headed to Vegas rolls the dice on getting into the US for a vacation; a family immigrating from Vietnam hope their enthusiasm translates; at JFK cargo facility, boxes of pancake mix fall flat.

When a general's emissary is sent to the 4077th to check it out, rumors about the visitor's real purpose run rampant.

Hawkeye's letter begs Truman to stop the war.

When the sun sets, strange things come alive. Imagine a full-scale war waged against thousands of invading frogs, an artist who only paints while sleepwalking, and battlefield wounds that literally glow in the dark. These bizarre and unbelievable moments all have one thing in common-they happen only when darkness falls.

Isolated along the southernmost part of the planet, Antarctica is best known as the frozen continent.

Since the dawn of civilization, humanity has been fixated on predictions of the end times and their own demise.

All over the world stand ancient structures so massive, precise, and baffling that they seem impossible for not just their time, but ours as well; from colossal walls and giant stone tombs to temples carved from solid rock, how did ancient civilizations achieve feats of engineering that still defy modern understanding?

When a general's emissary is sent to the 4077th to check it out, rumors about the visitor's real purpose run rampant.

Hawkeye's letter begs Truman to stop the war.

When the sun sets, strange things come alive. Imagine a full-scale war waged against thousands of invading frogs, an artist who only paints while sleepwalking, and battlefield wounds that literally glow in the dark. These bizarre and unbelievable moments all have one thing in common-they happen only when darkness falls.

Are the swarms of drones seen over New Jersey friend or foe? A strange green creature is found in Taiwan. Could it be an alien? Why are hundreds of fish spinning themselves to death? A camera captures sheets that move by themselves. Is it a ghost getting out of bed? Tony Harris and his team of experts dive into these claims to find the truth.

All over the world stand ancient structures so massive, precise, and baffling that they seem impossible for not just their time, but ours as well; from colossal walls and giant stone tombs to temples carved from solid rock, how did ancient civilizations achieve feats of engineering that still defy modern understanding?

Behind official policy often stand unofficial actors. Discover the audacious operations of Red Cell, the covert Navy SEAL team that staged attacks on U.S. bases to expose deadly weaknesses; "The Shop," the CIA's clandestine cadre of expert thieves and lock pickers who stole secrets worldwide; and the Alamo Scouts, the elite World War II special forces whose exploits remained a hidden chapter of history for decades. These units thrived where denial was policy, kept in the dark.

Some of Earth's most remarkable creatures push the limits of belief - from a headless chicken who toured the nation, to a goat who tipped the scales of war, to dolphins drafted into Cold War espionage. Proof that the strangest legends sometimes walk, swim, or fly among us.

When the sun sets, strange things come alive. Imagine a full-scale war waged against thousands of invading frogs, an artist who only paints while sleepwalking, and battlefield wounds that literally glow in the dark. These bizarre and unbelievable moments all have one thing in common-they happen only when darkness falls.

Behind official policy often stand unofficial actors. Discover the audacious operations of Red Cell, the covert Navy SEAL team that staged attacks on U.S. bases to expose deadly weaknesses; "The Shop," the CIA's clandestine cadre of expert thieves and lock pickers who stole secrets worldwide; and the Alamo Scouts, the elite World War II special forces whose exploits remained a hidden chapter of history for decades. These units thrived where denial was policy, kept in the dark.

Some of Earth's most remarkable creatures push the limits of belief - from a headless chicken who toured the nation, to a goat who tipped the scales of war, to dolphins drafted into Cold War espionage. Proof that the strangest legends sometimes walk, swim, or fly among us.

Isolated along the southernmost part of the planet, Antarctica is best known as the frozen continent.

Since the dawn of civilization, humanity has been fixated on predictions of the end times and their own demise.

All over the world stand ancient structures so massive, precise, and baffling that they seem impossible for not just their time, but ours as well; from colossal walls and giant stone tombs to temples carved from solid rock, how did ancient civilizations achieve feats of engineering that still defy modern understanding?

When a general's emissary is sent to the 4077th to check it out, rumors about the visitor's real purpose run rampant.

Hawkeye's letter begs Truman to stop the war.

Mikey goes on a treasure hunt; Andrew and Graeme must fly with the boss Joe McBryan.

Buffalo's campaign to air-lift 100,000 pounds of goods; Justin helps a Mountie; a 3D ultrasound.

Gold, the shiny precious metal that has been cherished through all recorded time, is vital to the modern world; if gold was suddenly stripped away, the technological and cultural world would be left reeling.

Mikey goes on a treasure hunt; Andrew and Graeme must fly with the boss Joe McBryan.

Buffalo's campaign to air-lift 100,000 pounds of goods; Justin helps a Mountie; a 3D ultrasound.

We've heard the tales of successful prison breaks, but these aren't your average escapes; from a man who frees himself all thanks to a stone fruit, to a Soviet pilot that evades capture by stealing the enemy's plane.

From the kitchen to the battlefield, some machines are just too strange to believe. Like an appliance that runs on pup power. Or a mousetrap so deadly, you need a permit to own one. How about a submarine car straight out of a Bond movie? Whether brilliant or baffling, these devices push the limits of what you thought possible.

Imagining free-falling 30,000 feet without a parachute, or being buried alive and living to tell the tale; these are improbable yet true-life tales of surviving the most extraordinary conditions.

Beards as cause of death; a lawnmower killing a spectator at a football game; discussing some unusual causes of death.

History is full of miracle cures, far-fetched products, and astonishing feats, but not all of them are legitimate. A miracle snake oil that cures all? A piece of the Brooklyn Bridge for sale? A marathon-winner who crosses the finish line without hardly breaking a sweat? These are the stories of some of history's most spectacular cons, each deception more unbelievable than the last.

A robber successfully snatching Einstein's brain; a thief who makes out with hundreds of dollars all while dressed as Santa Claus; these are some of history's most curious crimes.

We've heard the tales of successful prison breaks, but these aren't your average escapes; from a man who frees himself all thanks to a stone fruit, to a Soviet pilot that evades capture by stealing the enemy's plane.

From the kitchen to the battlefield, some machines are just too strange to believe. Like an appliance that runs on pup power. Or a mousetrap so deadly, you need a permit to own one. How about a submarine car straight out of a Bond movie? Whether brilliant or baffling, these devices push the limits of what you thought possible.

Imagining free-falling 30,000 feet without a parachute, or being buried alive and living to tell the tale; these are improbable yet true-life tales of surviving the most extraordinary conditions.

Beards as cause of death; a lawnmower killing a spectator at a football game; discussing some unusual causes of death.

History is full of miracle cures, far-fetched products, and astonishing feats, but not all of them are legitimate. A miracle snake oil that cures all? A piece of the Brooklyn Bridge for sale? A marathon-winner who crosses the finish line without hardly breaking a sweat? These are the stories of some of history's most spectacular cons, each deception more unbelievable than the last.

A robber successfully snatching Einstein's brain; a thief who makes out with hundreds of dollars all while dressed as Santa Claus; these are some of history's most curious crimes.

We've heard the tales of successful prison breaks, but these aren't your average escapes; from a man who frees himself all thanks to a stone fruit, to a Soviet pilot that evades capture by stealing the enemy's plane.

From the kitchen to the battlefield, some machines are just too strange to believe. Like an appliance that runs on pup power. Or a mousetrap so deadly, you need a permit to own one. How about a submarine car straight out of a Bond movie? Whether brilliant or baffling, these devices push the limits of what you thought possible.

Imagining free-falling 30,000 feet without a parachute, or being buried alive and living to tell the tale; these are improbable yet true-life tales of surviving the most extraordinary conditions.

Beards as cause of death; a lawnmower killing a spectator at a football game; discussing some unusual causes of death.

History is full of miracle cures, far-fetched products, and astonishing feats, but not all of them are legitimate. A miracle snake oil that cures all? A piece of the Brooklyn Bridge for sale? A marathon-winner who crosses the finish line without hardly breaking a sweat? These are the stories of some of history's most spectacular cons, each deception more unbelievable than the last.

A robber successfully snatching Einstein's brain; a thief who makes out with hundreds of dollars all while dressed as Santa Claus; these are some of history's most curious crimes.

On a California dream pick, the competitive pinball-wizard Wolfe brothers meet coin-op king Dirk at his giant poultry barn turned private arcade.

Mike overhauls a 1955 Belair Wagon in hopes of turning a quick profit, while Avery embarks on an ambitious restoration of a rare 1956 Ford C.O.E.; Mike's betting streak continues.

Fantasies turn to nightmares when Connor enlists Rust Bros on a personal build; Avery goes over budget on his dream truck; James tackles a project from his past.

Ted, Justin and Brandon race against the clock to extract a highly valuable art deco bar from a historic watering hole, but its sheer size and weight pose unexpected challenges.

Mike overhauls a 1955 Belair Wagon in hopes of turning a quick profit, while Avery embarks on an ambitious restoration of a rare 1956 Ford C.O.E.; Mike's betting streak continues.

Fantasies turn to nightmares when Connor enlists Rust Bros on a personal build; Avery goes over budget on his dream truck; James tackles a project from his past.

Remember when looking your best meant risking life and limb?; from dentures that could explode at the dinner table and stiff shirt collars that strangled people to death, to toxic hair implants and tanning pills that left them glowing orange.

Known for their seafaring skills and feared for their ferocity, the Vikings amassed gold, silver and other riches while trading and raiding across Europe; catches of this treasure have been found in Europe and North America, but this may be just the tip of the iceberg; are there any rich Viking hoards still waiting to be found? And if so, where are they?

Behind official policy often stand unofficial actors. Discover the audacious operations of Red Cell, the covert Navy SEAL team that staged attacks on U.S. bases to expose deadly weaknesses; "The Shop," the CIA's clandestine cadre of expert thieves and lock pickers who stole secrets worldwide; and the Alamo Scouts, the elite World War II special forces whose exploits remained a hidden chapter of history for decades. These units thrived where denial was policy, kept in the dark.

Some of Earth's most remarkable creatures push the limits of belief - from a headless chicken who toured the nation, to a goat who tipped the scales of war, to dolphins drafted into Cold War espionage. Proof that the strangest legends sometimes walk, swim, or fly among us.

The Viking's fearless ability to launch devastating raids across vast distances make him an elite force from the late 8th century to the mid-11th century; armed with axe and sword, he uses both strength and strategy to dominate his enemies.

From a hidden cache of bones, to an ancient tomb shrouded in mystery and even a rare sports car dug up in a backyard; these eerie revelations prove that some secrets refuse to stay buried.

Remember when looking your best meant risking life and limb?; from dentures that could explode at the dinner table and stiff shirt collars that strangled people to death, to toxic hair implants and tanning pills that left them glowing orange.

Known for their seafaring skills and feared for their ferocity, the Vikings amassed gold, silver and other riches while trading and raiding across Europe; catches of this treasure have been found in Europe and North America, but this may be just the tip of the iceberg; are there any rich Viking hoards still waiting to be found? And if so, where are they?

The Viking's fearless ability to launch devastating raids across vast distances make him an elite force from the late 8th century to the mid-11th century; armed with axe and sword, he uses both strength and strategy to dominate his enemies.

Some of Earth's most remarkable creatures push the limits of belief - from a headless chicken who toured the nation, to a goat who tipped the scales of war, to dolphins drafted into Cold War espionage. Proof that the strangest legends sometimes walk, swim, or fly among us.

A Delta Force operator deploys unparalleled skill in counterterrorism, hostage rescue, and covert operations; his ability to neutralize high-level threats makes the Delta Force operator a critical force in combating global terrorism.

After seeing ancient structures in the Portuguese Azores islands that mirror others found on Oak Island, the team begins a massive dig in the Money Pit area where they have detected evidence of buried treasure.

Remember when looking your best meant risking life and limb?; from dentures that could explode at the dinner table and stiff shirt collars that strangled people to death, to toxic hair implants and tanning pills that left them glowing orange.

A Delta Force operator deploys unparalleled skill in counterterrorism, hostage rescue, and covert operations; his ability to neutralize high-level threats makes the Delta Force operator a critical force in combating global terrorism.

After seeing ancient structures in the Portuguese Azores islands that mirror others found on Oak Island, the team begins a massive dig in the Money Pit area where they have detected evidence of buried treasure.

Known for their seafaring skills and feared for their ferocity, the Vikings amassed gold, silver and other riches while trading and raiding across Europe; catches of this treasure have been found in Europe and North America, but this may be just the tip of the iceberg; are there any rich Viking hoards still waiting to be found? And if so, where are they?

Behind official policy often stand unofficial actors. Discover the audacious operations of Red Cell, the covert Navy SEAL team that staged attacks on U.S. bases to expose deadly weaknesses; "The Shop," the CIA's clandestine cadre of expert thieves and lock pickers who stole secrets worldwide; and the Alamo Scouts, the elite World War II special forces whose exploits remained a hidden chapter of history for decades. These units thrived where denial was policy, kept in the dark.

Some of Earth's most remarkable creatures push the limits of belief - from a headless chicken who toured the nation, to a goat who tipped the scales of war, to dolphins drafted into Cold War espionage. Proof that the strangest legends sometimes walk, swim, or fly among us.

The Viking's fearless ability to launch devastating raids across vast distances make him an elite force from the late 8th century to the mid-11th century; armed with axe and sword, he uses both strength and strategy to dominate his enemies.

Historic flood waters slam the region, stranding Junior and forcing Big Donny's new hires to step up on a mountain-side tow recovery; Dale needs a helping hand to keep his fledgling business alive.

Logger Kevin Wenstob finds himself in a battle of wills against an opposing crew trying to thwart his plans to expand his sawmill.

Bryan Sr. resurrects an ancient crane dubbed "Rust Bucket" to complete a remote fishing cabin; Beat struggles with two huge projects competing for time and square footage on the work yard.

Historic flood waters slam the region, stranding Junior and forcing Big Donny's new hires to step up on a mountain-side tow recovery; Dale needs a helping hand to keep his fledgling business alive.

Logger Kevin Wenstob finds himself in a battle of wills against an opposing crew trying to thwart his plans to expand his sawmill.

A man from Mexico is questioned when it is indicated his vacation plans may include a work component; at JFK cargo facility a shipment of live moth pupas is put under the microscope; in San Francisco, an angry traveler points a finger at CBP.

A couple and their girlfriend, with a loaded weapon on board, reach the border by mistake; in San Francisco, a man wandering aimlessly around the airport after his flight arrives is questioned about the contents of his luggage.

Col. Potter orders Klinger to tutor him for driving school on a night Klinger has set aside for a big poker game.

Charles receives a week's supply of newspapers from home at a time when no other mail is getting through.

The Valentine's Day Massacre, a shocking event in Chicago's history, occurred on February 14th, 1929; it's an unsolved mystery.

From military-grade exoskeletons that grant superhuman strength to advances in visual spectrometers that enhance human perception, today's technologies are rapidly transforming myth into reality; sonic weapons capable of toppling structures evoke the biblical fall of Jericho; invisibility cloaks under development invoke the Ring of Gyges, said to render their wearer unseen and untouchable.

Counting down ten unexplainable technologies in history, from mysterious golden orbs discovered in Mexico and a sacred wooden box that could communicate with the heavens to an ancient tomb that is said to depict an astronaut.

Col. Potter orders Klinger to tutor him for driving school on a night Klinger has set aside for a big poker game.

Charles receives a week's supply of newspapers from home at a time when no other mail is getting through.

The Valentine's Day Massacre, a shocking event in Chicago's history, occurred on February 14th, 1929; it's an unsolved mystery.

A Delta Force operator deploys unparalleled skill in counterterrorism, hostage rescue, and covert operations; his ability to neutralize high-level threats makes the Delta Force operator a critical force in combating global terrorism.

After seeing ancient structures in the Portuguese Azores islands that mirror others found on Oak Island, the team begins a massive dig in the Money Pit area where they have detected evidence of buried treasure.

On December 11, 1978, a gang of thieves lifted around $5 million in cash and $800,000 in jewelry from a luxury airline hangar at New York's JFK Airport, marking the largest heist in U.S. history at that time. The authorities interview employees and find a connection to local mafia bosses... but every time they close in on a potential suspect, that suspect ends up dead. Almost 50 years later, they still haven't found all the culprits-or the goods. So, who orchestrated the Lufthansa heist?

Pythagoras was initiated into the cosmic language of geometry; the Knights Templar and Freemasons incorporated sacred numbers, mystical patterns and divine symbols into their art and architecture.

On December 11, 1978, a gang of thieves lifted around $5 million in cash and $800,000 in jewelry from a luxury airline hangar at New York's JFK Airport, marking the largest heist in U.S. history at that time. The authorities interview employees and find a connection to local mafia bosses... but every time they close in on a potential suspect, that suspect ends up dead. Almost 50 years later, they still haven't found all the culprits-or the goods. So, who orchestrated the Lufthansa heist?

Counting down ten unexplainable technologies in history, from mysterious golden orbs discovered in Mexico and a sacred wooden box that could communicate with the heavens to an ancient tomb that is said to depict an astronaut.

From military-grade exoskeletons that grant superhuman strength to advances in visual spectrometers that enhance human perception, today's technologies are rapidly transforming myth into reality; sonic weapons capable of toppling structures evoke the biblical fall of Jericho; invisibility cloaks under development invoke the Ring of Gyges, said to render their wearer unseen and untouchable.

The Valentine's Day Massacre, a shocking event in Chicago's history, occurred on February 14th, 1929; it's an unsolved mystery.

Col. Potter orders Klinger to tutor him for driving school on a night Klinger has set aside for a big poker game.

Charles receives a week's supply of newspapers from home at a time when no other mail is getting through.

Dale and his five-year old son wait on the perilous shoulder of a wintery highway after their truck dies; Angela struggles to pull off a quick flip with a rare off-road vehicle.

Thunder and lightning threaten logger Kevin Wenstob's crew as they shift into high gear on his high mountain timber claim.

Tensions run high when Andre muscles in on Sam's build in Kansas; winter gales put a chill on Peter's project for a Russian client.

Dale and his five-year old son wait on the perilous shoulder of a wintery highway after their truck dies; Angela struggles to pull off a quick flip with a rare off-road vehicle.

Thunder and lightning threaten logger Kevin Wenstob's crew as they shift into high gear on his high mountain timber claim.

A father and son from China have four suitcases full of undeclared food; an immigration raid targets illegal workers.

A Dutch woman with a lot of luggage claims she's on a four-day holiday; a Chinese parcel contains a shocking surprise; actor Corey Feldman shows up.

Klinger is accused of being responsible for a rash of thefts around the camp.

Klinger, facing a court-martial, agrees to let Charles defend him.

Behind official policy often stand unofficial actors. Discover the audacious operations of Red Cell, the covert Navy SEAL team that staged attacks on U.S. bases to expose deadly weaknesses; "The Shop," the CIA's clandestine cadre of expert thieves and lock pickers who stole secrets worldwide; and the Alamo Scouts, the elite World War II special forces whose exploits remained a hidden chapter of history for decades. These units thrived where denial was policy, kept in the dark.

Did a UFO in Texas streak across the sky during a solar eclipse? Is a giant creature making waves in a Canadian river? Could a mysterious metal sphere found in the woods actually be alien technology? Tony Harris and his team look at the evidence.

Treasure hunter Darrel Miklos and his team are embarking on a mission to solve a mystery: the disappearance of the Nazi's looted World War II treasure, estimated to be worth billions.

Treasure hunter Darrell Miklos' search for treasure-filled, lost Nazi U-Boats takes an unexpected turn when a 98-year-old local eyewitness gives him a tip that changes the course of his entire investigation.

Klinger is accused of being responsible for a rash of thefts around the camp.

Klinger, facing a court-martial, agrees to let Charles defend him.

Did a UFO in Texas streak across the sky during a solar eclipse? Is a giant creature making waves in a Canadian river? Could a mysterious metal sphere found in the woods actually be alien technology? Tony Harris and his team look at the evidence.

On December 11, 1978, a gang of thieves lifted around $5 million in cash and $800,000 in jewelry from a luxury airline hangar at New York's JFK Airport, marking the largest heist in U.S. history at that time. The authorities interview employees and find a connection to local mafia bosses... but every time they close in on a potential suspect, that suspect ends up dead. Almost 50 years later, they still haven't found all the culprits-or the goods. So, who orchestrated the Lufthansa heist?

Behind official policy often stand unofficial actors. Discover the audacious operations of Red Cell, the covert Navy SEAL team that staged attacks on U.S. bases to expose deadly weaknesses; "The Shop," the CIA's clandestine cadre of expert thieves and lock pickers who stole secrets worldwide; and the Alamo Scouts, the elite World War II special forces whose exploits remained a hidden chapter of history for decades. These units thrived where denial was policy, kept in the dark.

Did two warehouse employees discover a mystery monster in Mexico? It's a classic 1960s UFO photo, but is it history or a hoax? Has someone genetically engineered a half-human, half-goat hybrid? Did someone photograph a ghost in the same haunted hotel that inspired Stephen King's "The Shining"? Tony Harris and his team of experts examine the clues and deliver the answers.

Some discoveries defy explanation, like fossilized vomit from the Jurassic era, a sewer blob with a pulse, even a long-lost toy discovered inside a man's lung. These freaky finds prove that reality can be stranger-and far creepier-than fiction.

Behind official policy often stand unofficial actors. Discover the audacious operations of Red Cell, the covert Navy SEAL team that staged attacks on U.S. bases to expose deadly weaknesses; "The Shop," the CIA's clandestine cadre of expert thieves and lock pickers who stole secrets worldwide; and the Alamo Scouts, the elite World War II special forces whose exploits remained a hidden chapter of history for decades. These units thrived where denial was policy, kept in the dark.

Did two warehouse employees discover a mystery monster in Mexico? It's a classic 1960s UFO photo, but is it history or a hoax? Has someone genetically engineered a half-human, half-goat hybrid? Did someone photograph a ghost in the same haunted hotel that inspired Stephen King's "The Shining"? Tony Harris and his team of experts examine the clues and deliver the answers.

Some discoveries defy explanation, like fossilized vomit from the Jurassic era, a sewer blob with a pulse, even a long-lost toy discovered inside a man's lung. These freaky finds prove that reality can be stranger-and far creepier-than fiction.

Did a UFO in Texas streak across the sky during a solar eclipse? Is a giant creature making waves in a Canadian river? Could a mysterious metal sphere found in the woods actually be alien technology? Tony Harris and his team look at the evidence.

Treasure hunter Darrel Miklos and his team are embarking on a mission to solve a mystery: the disappearance of the Nazi's looted World War II treasure, estimated to be worth billions.

Treasure hunter Darrell Miklos' search for treasure-filled, lost Nazi U-Boats takes an unexpected turn when a 98-year-old local eyewitness gives him a tip that changes the course of his entire investigation.

Klinger is accused of being responsible for a rash of thefts around the camp.

Klinger, facing a court-martial, agrees to let Charles defend him.

Dale has to confront his past in a desperate attempt to keep his failing business alive; Dave has a meltdown stranded on a back road with a heavy load; Craig gets greasy on a biodiesel run with his girlfriend's truck.

Logger Kevin Wenstob gets terrible news as his crew struggles to bring the last of their 200 truckloads of logs off the mountain before winter shuts them down.

Joel hopes a contract for four cabins in Michigan will lead to an order for 16 more; Andre's kitchen renovation becomes more complicated than expected.

Dale has to confront his past in a desperate attempt to keep his failing business alive; Dave has a meltdown stranded on a back road with a heavy load; Craig gets greasy on a biodiesel run with his girlfriend's truck.

Logger Kevin Wenstob gets terrible news as his crew struggles to bring the last of their 200 truckloads of logs off the mountain before winter shuts them down.

An angry businessman hides the real reason for his hostility; officers try to process some unusual Mexican migrants.

Officers drill an American oil worker with a shady past; a British traveler's proposed reunion with a girlfriend could be cut short.

Visiting British soldiers explain an age-old tradition about the day after Christmas when the enlisted men and officers trade places for the day.

Klinger, while ill, communicates with the spirit of a dead soldier.

Remember when looking your best meant risking life and limb?; from dentures that could explode at the dinner table and stiff shirt collars that strangled people to death, to toxic hair implants and tanning pills that left them glowing orange.

Obsessed engineer Joseph Strauss and President Herbert Hoover battle side by side to build the two longest suspension bridges of all time in San Francisco: The Golden Gate and the Bay Bridge.

A hard-driving engineer with a reputation for excellence is on a quest to tame one of the wildest rivers in the United States, bringing much needed water to the arid American West.

Family-owned hardware stores become behemoth brands who battle it out taking big risks, ushering in new innovations and betting it all in a race to become the number one hardware store chain in America.

Visiting British soldiers explain an age-old tradition about the day after Christmas when the enlisted men and officers trade places for the day.

Klinger, while ill, communicates with the spirit of a dead soldier.

Rival cereal giants race to invent the next must-have bowl, sparking a sugary arms race of mascots, crunch, candy and the first ever chocolate cereal.

Some discoveries defy explanation, like fossilized vomit from the Jurassic era, a sewer blob with a pulse, even a long-lost toy discovered inside a man's lung. These freaky finds prove that reality can be stranger-and far creepier-than fiction.

Remember when looking your best meant risking life and limb?; from dentures that could explode at the dinner table and stiff shirt collars that strangled people to death, to toxic hair implants and tanning pills that left them glowing orange.

A candy maker's botched experiment leads to the world's first bubble gum, its distinctive color, and a decades-long bubble gum war fueled by mascots, comic strips, baseball cards, and novelty flavors, transforming gum into a pop culture powerhouse and reshaping the candy aisle.

Remember when playtime meant tempting fate?; from toy belts that fire speeding projectiles, to high-powered pogo sticks that send people soaring, to dolls that try to eat people alive, these playthings are made for kids, but their risks are anything but child's play; it's a mind-blowing, bone-rattling trip through the toys of yesteryear that remind people of a time when childhood was wild, free, and hazardous.

Rival cereal giants race to invent the next must-have bowl, sparking a sugary arms race of mascots, crunch, candy and the first ever chocolate cereal.

A candy maker's botched experiment leads to the world's first bubble gum, its distinctive color, and a decades-long bubble gum war fueled by mascots, comic strips, baseball cards, and novelty flavors, transforming gum into a pop culture powerhouse and reshaping the candy aisle.

Remember when playtime meant tempting fate?; from toy belts that fire speeding projectiles, to high-powered pogo sticks that send people soaring, to dolls that try to eat people alive, these playthings are made for kids, but their risks are anything but child's play; it's a mind-blowing, bone-rattling trip through the toys of yesteryear that remind people of a time when childhood was wild, free, and hazardous.

Obsessed engineer Joseph Strauss and President Herbert Hoover battle side by side to build the two longest suspension bridges of all time in San Francisco: The Golden Gate and the Bay Bridge.

A hard-driving engineer with a reputation for excellence is on a quest to tame one of the wildest rivers in the United States, bringing much needed water to the arid American West.

Family-owned hardware stores become behemoth brands who battle it out taking big risks, ushering in new innovations and betting it all in a race to become the number one hardware store chain in America.

Visiting British soldiers explain an age-old tradition about the day after Christmas when the enlisted men and officers trade places for the day.

Klinger, while ill, communicates with the spirit of a dead soldier.

Dave and Tristan fight an antique wood boiler and each other leading to a showdown between father and son; Craig gets muddy on a radio antenna delivery job that leaves its mark; Dale goes on a family trip to help cut a deal for his dad.

Spring is here, and with just weeks to finish logging before he has to give his timber claim back, Kevin invests money he doesn't have on big plans to get the job done but when everything starts to go wrong, he's not sure he'll make his deadline.

Peter gets stuck in the mud; Beat helps Sam with his biggest build ever, but a reckless crane operator threatens the entire project.

Dave and Tristan fight an antique wood boiler and each other leading to a showdown between father and son; Craig gets muddy on a radio antenna delivery job that leaves its mark; Dale goes on a family trip to help cut a deal for his dad.

Spring is here, and with just weeks to finish logging before he has to give his timber claim back, Kevin invests money he doesn't have on big plans to get the job done but when everything starts to go wrong, he's not sure he'll make his deadline.

A sloshed snowboarder causes trouble at the airport; a pair of packages add up to a deadly surprise.

A bad-tempered drill worker returning home from Japan goes one step too far with officers; a Californian woman hides something in her child's stroller.

An injured pregnant cow is brought to the 4077th; Hot Lips plans a birthday trip to Tokyo.

A noted war correspondent visits the 4077th to do a story on blood donated by his readers.

A Delta Force operator deploys unparalleled skill in counterterrorism, hostage rescue, and covert operations; his ability to neutralize high-level threats makes the Delta Force operator a critical force in combating global terrorism.

The pressure is on for Bodie when the largest restoration of his career flames out; Dale's routine tune-up on a 1946 Harley turns into a complete overhaul; the Monkey Business team runs into a hairy situation.

At Wheels Through Time, Dale is charged with bringing a mysterious, 104-year-old motorcycle back to life; Steve's Restorations deals with a rare vintage arm-wrestling arcade game from the 1980s.

Steve's Restorations takes on the challenge of restoring a client's rust bucket 1972 Gran Torino; in Georgia, Bob's Garage brings back a family's cherished 1959 hi-fi stereo.

An injured pregnant cow is brought to the 4077th; Hot Lips plans a birthday trip to Tokyo.

A noted war correspondent visits the 4077th to do a story on blood donated by his readers.

A Delta Force operator deploys unparalleled skill in counterterrorism, hostage rescue, and covert operations; his ability to neutralize high-level threats makes the Delta Force operator a critical force in combating global terrorism.

A candy maker's botched experiment leads to the world's first bubble gum, its distinctive color, and a decades-long bubble gum war fueled by mascots, comic strips, baseball cards, and novelty flavors, transforming gum into a pop culture powerhouse and reshaping the candy aisle.