Steve explores the arid deserts of the Four Corners region, investigating monumental ancestral Puebloan sites like Chaco Canyon and Mesa Verde.

Steve ventures into the heart of the Cascade Mountain range; Steve explores D.B. Cooper through a new lens, asking how he could have survived and escaped his perilous jump into a dark and stormy November night.

Steve investigates the 1972 disappearance of the Begich/Boggs flight, a case that sparked the largest search in Alaska's history.

Returning to his Michigan roots, Steve investigates the mystery of Le Griffon, the legendary lost ship of the Great Lakes that has fascinated him since childhood; using his local knowledge and maritime expertise, he navigates shipwrecks and clues.

Steve journeys to Oregon's remote ranches to investigate the mystery of cattle mutilations; drawing on his understanding of the natural world and a hunter's perspective, he examines who is behind these surgically precise deaths.

Near Steve's cabin on Prince of Wales Island lies evidence of one of humanity's greatest milestones, human's arrival in the Americas; drawing on his deep expertise in this rugged environment, Steve investigates when the first Americans arrived.

Steve explores the arid deserts of the Four Corners region, investigating monumental ancestral Puebloan sites like Chaco Canyon and Mesa Verde.

A window washer falls nearly 50 stories; rocks and boulders move on their own; human feet.

A dogfight between alien aircraft and the U.S. Air Force; world's loudest sounds; a fishing trawler.

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The fundamental creation of the wheel helps shape the human experience, but if the wheel suddenly stopped working and society lost the greatest, game-changing accomplishments made using wheel technology, the world would be vastly different.

A window washer falls nearly 50 stories; rocks and boulders move on their own; human feet.

A dogfight between alien aircraft and the U.S. Air Force; world's loudest sounds; a fishing trawler.

The top-selling candy days of the year revolve around Easter, Valentine's Day and Halloween, and it all started with a few bold pioneers.

As new wing-focused restaurant chains take the recipe out of Buffalo, N.Y., restaurateurs must find a way to cleverly market the new "Buffalo wings" to turn their restaurants into national icons, and chicken wings into a global phenomenon.

Two icons compete for America's coffee drinkers and forever change a worldwide, multi-billion-dollar industry.

A look at some staples of Thanksgiving dinner that weren't around until a few brands used technological advances to reinvent turkey, stuffing, cranberry sauce, pumpkin pie and more; food innovators made each part of the meal accessible.

A century ago, most backyard grilling essentials were not yet invented; Henry Ford, a tinkerer named Kingsford, and a passionate butcher created recognizable summer brands and changed the face of American backyards.

When an entrepreneur creates shelf-stable peanut butter out of his garage, it leads to the birth of an iconic sandwich; as competition heats up to be America's favorite peanut butter, three famous brands battle it out to be number one.

Two entrepreneurs rise from the ashes of Prohibition by staking everything on two liquors - a bitter, bottom-shelf whisky, and a flavorless foreign moonshine - and go on to save an industry and create two of the most popular brands in the country.

At a time when dog food is a rarity and cat food is almost nonexistent, it will take visionary innovators to invent the first dog treat, dry food, the first cat food, and many more innovations that will carve out the billion-dollar pet food industry.

Before juice was everywhere, these innovators used brilliant ingenuity to create the most nostalgic drink products and thirst quenchers of the last century, leading the charge on a new billion dollar beverage industry.

The top-selling candy days of the year revolve around Easter, Valentine's Day and Halloween, and it all started with a few bold pioneers.

As new wing-focused restaurant chains take the recipe out of Buffalo, N.Y., restaurateurs must find a way to cleverly market the new "Buffalo wings" to turn their restaurants into national icons, and chicken wings into a global phenomenon.

Two icons compete for America's coffee drinkers and forever change a worldwide, multi-billion-dollar industry.

A look at some staples of Thanksgiving dinner that weren't around until a few brands used technological advances to reinvent turkey, stuffing, cranberry sauce, pumpkin pie and more; food innovators made each part of the meal accessible.

A century ago, most backyard grilling essentials were not yet invented; Henry Ford, a tinkerer named Kingsford, and a passionate butcher created recognizable summer brands and changed the face of American backyards.

When an entrepreneur creates shelf-stable peanut butter out of his garage, it leads to the birth of an iconic sandwich; as competition heats up to be America's favorite peanut butter, three famous brands battle it out to be number one.

Two entrepreneurs rise from the ashes of Prohibition by staking everything on two liquors - a bitter, bottom-shelf whisky, and a flavorless foreign moonshine - and go on to save an industry and create two of the most popular brands in the country.

At a time when dog food is a rarity and cat food is almost nonexistent, it will take visionary innovators to invent the first dog treat, dry food, the first cat food, and many more innovations that will carve out the billion-dollar pet food industry.

Before juice was everywhere, these innovators used brilliant ingenuity to create the most nostalgic drink products and thirst quenchers of the last century, leading the charge on a new billion dollar beverage industry.

A blast of arctic air reopens the ice roads; Steph Custance falls victim to severe icing and winds up in a ditch; truckers set out to see if the newly reopened ice crossings are really ready for their big rigs.

Chris and Nika face financial hardship; Cam's son-in-law is determined to find gold; Ken and Guillaume make a deal with a mining veteran.

A rise in oil pressure threatens one of the C-46's; Andrew and Graeme face a test as DC-3 co-pilots.

A blast of arctic air reopens the ice roads; Steph Custance falls victim to severe icing and winds up in a ditch; truckers set out to see if the newly reopened ice crossings are really ready for their big rigs.

Chris and Nika face financial hardship; Cam's son-in-law is determined to find gold; Ken and Guillaume make a deal with a mining veteran.

A rise in oil pressure threatens one of the C-46's; Andrew and Graeme face a test as DC-3 co-pilots.

Tony Harris and his team of experts dive into claims of the supernatural to find the truth.

Descendants of the Black Loyalists, Jamaican Maroons, and the Black Refugees represent Canada's largest Black population, and their incredible story begins in Nova Scotia in the 1700s.

The team launches new investigations aided by a fresh wave of exclusive eyewitnesses; these U.S. military veterans testify to a series of encounters between the military and UFOs dating back to the Vietnam War; the team attempts to connect the dots.

Andy and Paul return to Mt. Shasta, California, to investigate the cause of the strange and potentially deadly energies; these seem to draw everything toward the mountain from people to UAPs.

After the team unearths new and bizarre clues from the Mesa on Skinwalker Ranch, a complex laser experiment leads to an encounter.

For more than 2 centuries, a ranch in Utah has been associated with strange and disturbing occurrences that defy physical reality; a team of dedicated scientists, researchers and experts is determined to solve the mystery and reveal the secrets.

Descendants of the Black Loyalists, Jamaican Maroons, and the Black Refugees represent Canada's largest Black population, and their incredible story begins in Nova Scotia in the 1700s.

Tony Harris and his team of experts dive into claims of the supernatural to find the truth.

The team launches new investigations aided by a fresh wave of exclusive eyewitnesses; these U.S. military veterans testify to a series of encounters between the military and UFOs dating back to the Vietnam War; the team attempts to connect the dots.

Andy and Paul return to Mt. Shasta, California, to investigate the cause of the strange and potentially deadly energies; these seem to draw everything toward the mountain from people to UAPs.

After the team unearths new and bizarre clues from the Mesa on Skinwalker Ranch, a complex laser experiment leads to an encounter.

The team launches new investigations aided by a fresh wave of exclusive eyewitnesses; these U.S. military veterans testify to a series of encounters between the military and UFOs dating back to the Vietnam War; the team attempts to connect the dots.

Andy and Paul return to Mt. Shasta, California, to investigate the cause of the strange and potentially deadly energies; these seem to draw everything toward the mountain from people to UAPs.

After the team unearths new and bizarre clues from the Mesa on Skinwalker Ranch, a complex laser experiment leads to an encounter.

Tony Harris and his team of experts dive into claims of the supernatural to find the truth.

For more than 2 centuries, a ranch in Utah has been associated with strange and disturbing occurrences that defy physical reality; a team of dedicated scientists, researchers and experts is determined to solve the mystery and reveal the secrets.

Descendants of the Black Loyalists, Jamaican Maroons, and the Black Refugees represent Canada's largest Black population, and their incredible story begins in Nova Scotia in the 1700s.

For more than 2 centuries, a ranch in Utah has been associated with strange and disturbing occurrences that defy physical reality; a team of dedicated scientists, researchers and experts is determined to solve the mystery and reveal the secrets.

Polar Industries must deliver an oversized load hundreds of miles north on the winter roads; owner Mark Koyhaykewych recruits Lisa Kelly, then calls in Reno Ward, the 23-year-old son of the late Darrell Ward; a blizzard adds a new layer of danger.

Karl hopes to make a profit at Last Chance; Chris and Nika move to Stowe Creek; Cam and his wife melt the gold they've collected and find they're way below their target.

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

Polar Industries must deliver an oversized load hundreds of miles north on the winter roads; owner Mark Koyhaykewych recruits Lisa Kelly, then calls in Reno Ward, the 23-year-old son of the late Darrell Ward; a blizzard adds a new layer of danger.

Karl hopes to make a profit at Last Chance; Chris and Nika move to Stowe Creek; Cam and his wife melt the gold they've collected and find they're way below their target.

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

The latest video leak from the Department of Homeland Security; one of the world's most respected Bigfoot researchers; anachronistic works of art; a lost, sunken city off the coast of Louisiana.

Born free of an Ojibwe father and an escaped-slave mother in Upper Canada, John 'Daddy' Hall fought in the war of 1812, was captured and sold into slavery.

Sinaloa and its leader El Chapo aim to become the world's largest drug trafficking organization, but their success is threatened by the Tijuana Cartel, and U.S. and Mexican authorities.

Oakland Hells Angels president, Sonny Barger, transforms the club into an organized crime syndicate and creates a blueprint for outlaw biker clubs to follow; federal authorities strike at the club, employing the RICO statute.

In 1980s New York, two opposing factions of the American Mafia split the Gambino crime family down the middle; the old school and the new school struggle against one another; one murderous capo emerges as the Boss of Bosses.

Peril strikes during a daring investigation as the team embarks on their quest to understand what may lie beneath Skinwalker Ranch.

Born free of an Ojibwe father and an escaped-slave mother in Upper Canada, John 'Daddy' Hall fought in the war of 1812, was captured and sold into slavery.

The latest video leak from the Department of Homeland Security; one of the world's most respected Bigfoot researchers; anachronistic works of art; a lost, sunken city off the coast of Louisiana.

Sinaloa and its leader El Chapo aim to become the world's largest drug trafficking organization, but their success is threatened by the Tijuana Cartel, and U.S. and Mexican authorities.

Oakland Hells Angels president, Sonny Barger, transforms the club into an organized crime syndicate and creates a blueprint for outlaw biker clubs to follow; federal authorities strike at the club, employing the RICO statute.

In 1980s New York, two opposing factions of the American Mafia split the Gambino crime family down the middle; the old school and the new school struggle against one another; one murderous capo emerges as the Boss of Bosses.

Sinaloa and its leader El Chapo aim to become the world's largest drug trafficking organization, but their success is threatened by the Tijuana Cartel, and U.S. and Mexican authorities.

Oakland Hells Angels president, Sonny Barger, transforms the club into an organized crime syndicate and creates a blueprint for outlaw biker clubs to follow; federal authorities strike at the club, employing the RICO statute.

In 1980s New York, two opposing factions of the American Mafia split the Gambino crime family down the middle; the old school and the new school struggle against one another; one murderous capo emerges as the Boss of Bosses.

The latest video leak from the Department of Homeland Security; one of the world's most respected Bigfoot researchers; anachronistic works of art; a lost, sunken city off the coast of Louisiana.

Peril strikes during a daring investigation as the team embarks on their quest to understand what may lie beneath Skinwalker Ranch.

Born free of an Ojibwe father and an escaped-slave mother in Upper Canada, John 'Daddy' Hall fought in the war of 1812, was captured and sold into slavery.

Peril strikes during a daring investigation as the team embarks on their quest to understand what may lie beneath Skinwalker Ranch.

A small convoy heads out with an oversized load; Lisa Kelly and Reno Ward's skills are tested by the treacherous journey; Art Burke attempts to navigate an ice road over a frozen lake; Alex Debogorski stops to help a stranded trucker.

Chris and Nika's mine hand Charles gets injured, leaving them short-handed; Cam gives Donovan Cut one final try to save his season; Ken and Guillaume up their recovery system in hopes of catching finer gold.

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

A small convoy heads out with an oversized load; Lisa Kelly and Reno Ward's skills are tested by the treacherous journey; Art Burke attempts to navigate an ice road over a frozen lake; Alex Debogorski stops to help a stranded trucker.

Chris and Nika's mine hand Charles gets injured, leaving them short-handed; Cam gives Donovan Cut one final try to save his season; Ken and Guillaume up their recovery system in hopes of catching finer gold.

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

Examining if the famous glowing lights seen above Marfa, Texas are a natural or supernatural phenomenon, what spirit possessed a goat to walk down a street like a human, and if mysterious stone carvings in Japan are connected to a close encounter.

For many years Hogan's Alley was the heart of Vancouver's Black community; in the 1850s James Douglas invited Blacks to settle Vancouver island in an effort to stave off American annexation.

A silver orb in the sky, and alleged crash debris may be from a UFO; a 65-year-old-man might have some of the fastest hands in the West; an infamous spy organization's alleged footage of UFOs and aliens.

An in-depth look at the relationship between Indigenous people and settlers, offering an important lens into Indigenous history on the land that is now Canada, including Turtle Island's creation story and the important role women play in society.

A life-threatening incident forces the team to re-assess their methods of investigation; disturbing new evidence at homestead one has Tom and Travis on edge.

For many years Hogan's Alley was the heart of Vancouver's Black community; in the 1850s James Douglas invited Blacks to settle Vancouver island in an effort to stave off American annexation.

Examining if the famous glowing lights seen above Marfa, Texas are a natural or supernatural phenomenon, what spirit possessed a goat to walk down a street like a human, and if mysterious stone carvings in Japan are connected to a close encounter.

A silver orb in the sky, and alleged crash debris may be from a UFO; a 65-year-old-man might have some of the fastest hands in the West; an infamous spy organization's alleged footage of UFOs and aliens.

An in-depth look at the relationship between Indigenous people and settlers, offering an important lens into Indigenous history on the land that is now Canada, including Turtle Island's creation story and the important role women play in society.

A silver orb in the sky, and alleged crash debris may be from a UFO; a 65-year-old-man might have some of the fastest hands in the West; an infamous spy organization's alleged footage of UFOs and aliens.

An in-depth look at the relationship between Indigenous people and settlers, offering an important lens into Indigenous history on the land that is now Canada, including Turtle Island's creation story and the important role women play in society.

Examining if the famous glowing lights seen above Marfa, Texas are a natural or supernatural phenomenon, what spirit possessed a goat to walk down a street like a human, and if mysterious stone carvings in Japan are connected to a close encounter.

A life-threatening incident forces the team to re-assess their methods of investigation; disturbing new evidence at homestead one has Tom and Travis on edge.

For many years Hogan's Alley was the heart of Vancouver's Black community; in the 1850s James Douglas invited Blacks to settle Vancouver island in an effort to stave off American annexation.

A life-threatening incident forces the team to re-assess their methods of investigation; disturbing new evidence at homestead one has Tom and Travis on edge.

Reno Ward has a disastrous encounter with a speeding pick-up truck; Lisa Kelly attempts to rescue Reno but is forced to leave him to fend for himself; Art Burke attempts to deliver a Zamboni to save an isolated community's hockey season.

Ken and Guillaume face a dangerous situation; Karl begins sluicing the drained swamp at Last Chance; Cam weighs in for his final sale.

Chuck gets the Electra ready for a mission; Audrey returns and starts up the battle of the sexes.

Reno Ward has a disastrous encounter with a speeding pick-up truck; Lisa Kelly attempts to rescue Reno but is forced to leave him to fend for himself; Art Burke attempts to deliver a Zamboni to save an isolated community's hockey season.

Ken and Guillaume face a dangerous situation; Karl begins sluicing the drained swamp at Last Chance; Cam weighs in for his final sale.

Chuck gets the Electra ready for a mission; Audrey returns and starts up the battle of the sexes.

A home security video might show proof that UFOs are messing with technology; a species of carnivorous marsupials thought to be long extinct; a visitor at a historic cemetery in Savannah.

Tucked between Griffintown and St. Henri in Montreal's Sud Ouest is Little Burgundy, home to a Black population led by Black men who worked in Canada's railway industry as sleeping car porters.

Bodie is tasked to restore a very rare 1970 GTO Judge in one month's time for the SEMA car show; Andy modernizes a spark plug cleaner into a stereo; Steve makes a plan to transform a beat up 64 Ford Falcon into a work of art.

Exploring the real, and often misrepresented, history of Indigenous peoples on the land that is now called Canada; taking an in-depth look at the relationship between Indigenous people, the land and the settlers.

A historic moment occurs when the entire team witnesses, and documents, two UFO sightings directly over Skinwalker Ranch.

Tucked between Griffintown and St. Henri in Montreal's Sud Ouest is Little Burgundy, home to a Black population led by Black men who worked in Canada's railway industry as sleeping car porters.

A home security video might show proof that UFOs are messing with technology; a species of carnivorous marsupials thought to be long extinct; a visitor at a historic cemetery in Savannah.

Bodie is tasked to restore a very rare 1970 GTO Judge in one month's time for the SEMA car show; Andy modernizes a spark plug cleaner into a stereo; Steve makes a plan to transform a beat up 64 Ford Falcon into a work of art.

Exploring the real, and often misrepresented, history of Indigenous peoples on the land that is now called Canada; taking an in-depth look at the relationship between Indigenous people, the land and the settlers.

Bodie is tasked to restore a very rare 1970 GTO Judge in one month's time for the SEMA car show; Andy modernizes a spark plug cleaner into a stereo; Steve makes a plan to transform a beat up 64 Ford Falcon into a work of art.

Exploring the real, and often misrepresented, history of Indigenous peoples on the land that is now called Canada; taking an in-depth look at the relationship between Indigenous people, the land and the settlers.

A home security video might show proof that UFOs are messing with technology; a species of carnivorous marsupials thought to be long extinct; a visitor at a historic cemetery in Savannah.

A historic moment occurs when the entire team witnesses, and documents, two UFO sightings directly over Skinwalker Ranch.

Tucked between Griffintown and St. Henri in Montreal's Sud Ouest is Little Burgundy, home to a Black population led by Black men who worked in Canada's railway industry as sleeping car porters.

A historic moment occurs when the entire team witnesses, and documents, two UFO sightings directly over Skinwalker Ranch.

A big bump takes out Art Burke's radiator; Todd Dewey's rig lands in a snowbank; Steph Custance regrets her foray onto a wet ice crossing; Alex Debogorski uses a sled to drag a construction shack across a frozen lake.

Nika and Chris push through the final week of the season; low temperatures freeze Karl's sluicing plant; Ken and Guillaume try to make up for their disappointing season.

Devan, Scott and Adam battle for fuel; Audrey escorts a team of dog mushers.

A big bump takes out Art Burke's radiator; Todd Dewey's rig lands in a snowbank; Steph Custance regrets her foray onto a wet ice crossing; Alex Debogorski uses a sled to drag a construction shack across a frozen lake.

Nika and Chris push through the final week of the season; low temperatures freeze Karl's sluicing plant; Ken and Guillaume try to make up for their disappointing season.

Devan, Scott and Adam battle for fuel; Audrey escorts a team of dog mushers.

Scientists study claims of a dead mermaid discovered and preserved in Japan; UFOs attracted to nuclear facilities; the glowing-eyed sea creature captured on video chasing a motorboat; a man who lived alone in the jungle.

Examining the history of cats and dogs and how they have been helpful companions to humankind all over the globe.

Muskie Creek operations manager Bill Danh sends a six-truck convoy, including Lisa, Scooter, and Todd, on a crucial but near-impossible mission to a remote outpost on the Hudson Bay, traveling the world's longest winter road.

Mike journeys to an uninhabited island to hunt a herd of wild buffalo with help from the local natives; Lauro pushes himself training for the upcoming Iditarod with a grueling 260-mile run through the Alaskan wilderness.

The remaining participants are finally adapting to the cruel environment, but the hunt for food leads them into harms way; one man is forced to drop his new boat miles from camp.

When advanced testing shows evidence of strange anomalies under the ranch, Brandon finally gives the team permission to dig.

Examining the history of cats and dogs and how they have been helpful companions to humankind all over the globe.

Scientists study claims of a dead mermaid discovered and preserved in Japan; UFOs attracted to nuclear facilities; the glowing-eyed sea creature captured on video chasing a motorboat; a man who lived alone in the jungle.

Muskie Creek operations manager Bill Danh sends a six-truck convoy, including Lisa, Scooter, and Todd, on a crucial but near-impossible mission to a remote outpost on the Hudson Bay, traveling the world's longest winter road.

Mike journeys to an uninhabited island to hunt a herd of wild buffalo with help from the local natives; Lauro pushes himself training for the upcoming Iditarod with a grueling 260-mile run through the Alaskan wilderness.

The remaining participants are finally adapting to the cruel environment, but the hunt for food leads them into harms way; one man is forced to drop his new boat miles from camp.

Muskie Creek operations manager Bill Danh sends a six-truck convoy, including Lisa, Scooter, and Todd, on a crucial but near-impossible mission to a remote outpost on the Hudson Bay, traveling the world's longest winter road.

Mike journeys to an uninhabited island to hunt a herd of wild buffalo with help from the local natives; Lauro pushes himself training for the upcoming Iditarod with a grueling 260-mile run through the Alaskan wilderness.

The remaining participants are finally adapting to the cruel environment, but the hunt for food leads them into harms way; one man is forced to drop his new boat miles from camp.

Scientists study claims of a dead mermaid discovered and preserved in Japan; UFOs attracted to nuclear facilities; the glowing-eyed sea creature captured on video chasing a motorboat; a man who lived alone in the jungle.

When advanced testing shows evidence of strange anomalies under the ranch, Brandon finally gives the team permission to dig.

Examining the history of cats and dogs and how they have been helpful companions to humankind all over the globe.

When advanced testing shows evidence of strange anomalies under the ranch, Brandon finally gives the team permission to dig.

The guys haggle with a teenage girl over classic old Canadian canoes.

The Pickers load up on Newfoundland collectibles.

Danny and his crew continue to piece together a World War II-era Triumph motorcycle for a client, hoping to make it a tribute to his family's military roots, but when they finally get it all together and try to crank it, it won't start.

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The guys haggle with a teenage girl over classic old Canadian canoes.

The Pickers load up on Newfoundland collectibles.

A ghostly salvage in an abandoned hospital brings some unusual finds; the salvage team discovers a surprising collection of vintage items during the demolition of a 50's era subdivision property.

Up to 70% of UFO sightings happen in hot spots; examining what attracts UFOs and extraterrestrial visitors to these locations.

More than 10,000 crop circle formations have been documented in over 50 countries.

The discovery of the ancient megalithic site of Karahan Tepe in southern Turkey turns the world of archaeology on its head, displaying engineering skills far beyond what the people of the time were thought to be capable of.

The towering obelisks of ancient Egypt weigh hundreds of tons; while mainstream scholars identify them as monuments to the pharaohs, ancient astronaut theorists suggest they may have served a technological purpose.

The Mutual UFO Network is an organization devoted to the scientific investigation of unidentified aerial phenomena and other unexplained encounters; with more than five decades of investigations, MUFON's extensive database could contain proof.

Terrifying encounters at 40,000 feet; pilot accounts of UFOs taking control of their aircraft; entire jumbo jets disappearing into thin air; since the dawn of aviation, pilots have experienced unexplainable events in the sky.

Counting down the world's top 10 mysterious devices, from strange, grooved disks found in a cave in China to an ancient Greek computer to an incredible crystal skull unearthed in Mexico.

"Ancient Aliens" is counting down the world's top 10 mysterious islands, including sites said to be home to giants, remote landmasses that are home to massive megalithic structures, and even islands that disappear into thin air.

"Ancient Aliens" is counting down the top 10 alien craft, from V-shaped objects to orbs of light to flying saucers.

Up to 70% of UFO sightings happen in hot spots; examining what attracts UFOs and extraterrestrial visitors to these locations.

More than 10,000 crop circle formations have been documented in over 50 countries.

The discovery of the ancient megalithic site of Karahan Tepe in southern Turkey turns the world of archaeology on its head, displaying engineering skills far beyond what the people of the time were thought to be capable of.

The towering obelisks of ancient Egypt weigh hundreds of tons; while mainstream scholars identify them as monuments to the pharaohs, ancient astronaut theorists suggest they may have served a technological purpose.

The Mutual UFO Network is an organization devoted to the scientific investigation of unidentified aerial phenomena and other unexplained encounters; with more than five decades of investigations, MUFON's extensive database could contain proof.

Terrifying encounters at 40,000 feet; pilot accounts of UFOs taking control of their aircraft; entire jumbo jets disappearing into thin air; since the dawn of aviation, pilots have experienced unexplainable events in the sky.

Counting down the world's top 10 mysterious devices, from strange, grooved disks found in a cave in China to an ancient Greek computer to an incredible crystal skull unearthed in Mexico.

"Ancient Aliens" is counting down the world's top 10 mysterious islands, including sites said to be home to giants, remote landmasses that are home to massive megalithic structures, and even islands that disappear into thin air.

"Ancient Aliens" is counting down the top 10 alien craft, from V-shaped objects to orbs of light to flying saucers.

Sea lions disappear days before an earthquake; a mysterious medieval manuscript.

A surfer is saved by dolphins; pets identify people about to die; a teen lifts a car.

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Exploring what the world would be like if salt and all of its vital contributions, from food preservation to enabling industry, were to suddenly disappear.

Sea lions disappear days before an earthquake; a mysterious medieval manuscript.

A surfer is saved by dolphins; pets identify people about to die; a teen lifts a car.

An argument for the Ancient Astronaut theory is the engineering evident in the construction of ancient megalithic sites worldwide; colossal stones, precise cuts, and fitted blocks at many of these sites hint at the prospect of advanced technology.

Ancient Astronaut theorists propose that descriptions of sky gods and star beings might reflect real encounters with extraterrestrial visitors in the remote past.

Earth's deep, uncharted waters have long been a source of wonder; from legends of aquatic cities ruled by gods and creatures to frequent UFO sightings, considering if these might point to an otherworldly presence lurking in Earth watery depths.

An argument for the Ancient Astronaut theory is the engineering evident in the construction of ancient megalithic sites worldwide; colossal stones, precise cuts, and fitted blocks at many of these sites hint at the prospect of advanced technology.

Ancient Astronaut theorists propose that descriptions of sky gods and star beings might reflect real encounters with extraterrestrial visitors in the remote past.

Earth's deep, uncharted waters have long been a source of wonder; from legends of aquatic cities ruled by gods and creatures to frequent UFO sightings, considering if these might point to an otherworldly presence lurking in Earth watery depths.

An argument for the Ancient Astronaut theory is the engineering evident in the construction of ancient megalithic sites worldwide; colossal stones, precise cuts, and fitted blocks at many of these sites hint at the prospect of advanced technology.

Ancient Astronaut theorists propose that descriptions of sky gods and star beings might reflect real encounters with extraterrestrial visitors in the remote past.

Earth's deep, uncharted waters have long been a source of wonder; from legends of aquatic cities ruled by gods and creatures to frequent UFO sightings, considering if these might point to an otherworldly presence lurking in Earth watery depths.

Lisa Kelly and Steph Custance team up for a challenging passage on the icy terrain; Art Burke brings a split load into the north country, hoping this will be his last load of the year; Todd Dewey hauls a double oversized camp shack.

The miners recap their highs and lows of the season.

AJ and Andrew get the chance to fly the DC-3 mounted on snow skis; the Mackenzie Valley food mail.

Lisa Kelly and Steph Custance team up for a challenging passage on the icy terrain; Art Burke brings a split load into the north country, hoping this will be his last load of the year; Todd Dewey hauls a double oversized camp shack.

The miners recap their highs and lows of the season.

AJ and Andrew get the chance to fly the DC-3 mounted on snow skis; the Mackenzie Valley food mail.

Tony Harris travels to the Florida coast to investigate mysterious ruins discovered at the Bermuda Triangle; Tony and a team of experts analyze evidence of similar discoveries from around the world and pass a verdict.

Discovering the roots of Black music in Canada, from the early black settlers of the Underground Railroad to the 1960s Caribbean migration, which introduced music which shaped all music within Canada today.

Lue Elizondo uncovers an exclusive video, sparking an investigation into possible connections to the USSR and the threat posed by UFOs to the planet.

Andy and Paul meet with the Skinwalker team to review the most compelling evidence uncovered in phase two; from UAP sightings, to evidence of portals, to terrifying encounters with unknown entities.

When an UAP appears above Skinwalker Walker Ranch during an experiment involving hundreds of illuminated drones, the timing of what happens next leaves the team in disbelief.

The ranch reacts in dangerous ways when the team begins to dig.

Discovering the roots of Black music in Canada, from the early black settlers of the Underground Railroad to the 1960s Caribbean migration, which introduced music which shaped all music within Canada today.

Tony Harris travels to the Florida coast to investigate mysterious ruins discovered at the Bermuda Triangle; Tony and a team of experts analyze evidence of similar discoveries from around the world and pass a verdict.

Lue Elizondo uncovers an exclusive video, sparking an investigation into possible connections to the USSR and the threat posed by UFOs to the planet.

Andy and Paul meet with the Skinwalker team to review the most compelling evidence uncovered in phase two; from UAP sightings, to evidence of portals, to terrifying encounters with unknown entities.

When an UAP appears above Skinwalker Walker Ranch during an experiment involving hundreds of illuminated drones, the timing of what happens next leaves the team in disbelief.

Lue Elizondo uncovers an exclusive video, sparking an investigation into possible connections to the USSR and the threat posed by UFOs to the planet.

Andy and Paul meet with the Skinwalker team to review the most compelling evidence uncovered in phase two; from UAP sightings, to evidence of portals, to terrifying encounters with unknown entities.

When an UAP appears above Skinwalker Walker Ranch during an experiment involving hundreds of illuminated drones, the timing of what happens next leaves the team in disbelief.

Tony Harris travels to the Florida coast to investigate mysterious ruins discovered at the Bermuda Triangle; Tony and a team of experts analyze evidence of similar discoveries from around the world and pass a verdict.

The ranch reacts in dangerous ways when the team begins to dig.

Discovering the roots of Black music in Canada, from the early black settlers of the Underground Railroad to the 1960s Caribbean migration, which introduced music which shaped all music within Canada today.

The ranch reacts in dangerous ways when the team begins to dig.

Drivers head out one last time during the spring thaw; Steph Custance slides into trees; Todd Dewey struggles with a load on a twisty trail; Art Burke retrieves a heavy bulldozer; Reno Ward's truck dies on the ice; Lisa Kelly gets an emergency call.

Now in a wheelchair, Big Al returns to gold mining; Bernie clashes with his son; Karl finds gold right away; Chris reunites with his partner and their kids.

Buffalo transports the Stanley Cup on a tour of the North; a Transport Canada violation forces Joe to give up his license for 10 days; he reluctantly looks for a captain to replace him on the passenger run he's flown for almost 30 years.

Drivers head out one last time during the spring thaw; Steph Custance slides into trees; Todd Dewey struggles with a load on a twisty trail; Art Burke retrieves a heavy bulldozer; Reno Ward's truck dies on the ice; Lisa Kelly gets an emergency call.

Now in a wheelchair, Big Al returns to gold mining; Bernie clashes with his son; Karl finds gold right away; Chris reunites with his partner and their kids.

Buffalo transports the Stanley Cup on a tour of the North; a Transport Canada violation forces Joe to give up his license for 10 days; he reluctantly looks for a captain to replace him on the passenger run he's flown for almost 30 years.

Traveling to the Florida coast, a hotspot for UFO sightings; Tony and his team analyze evidence of UFOs and wormholes in the Bermuda Triangle and pass a verdict on similar discoveries from around the world.

Examining the systemic barriers that Black artists face in the radio and music label industries and how this led to pivotal moments and historic protests that shaped the current landscape of the music industry today.

The Chicago Outfit takes over the Windy City, even if it means Al Capone's downfall.

After Los Angeles-based MS-13 members are deported back to El Salvador, the now worldwide vicious group attempts to take over U.S. suburbs, but the authorities fight back.

In the 1990s, three violent cartels battled for control of the Mexican drug world; one brutally ambitious Narco, known as El Chapo, rose above the rest to create one unified cartel, and become the most powerful criminal in Mexico's history.

When a cow suddenly and mysteriously dies, surveillance footage poses another worldly explanation.

Examining the systemic barriers that Black artists face in the radio and music label industries and how this led to pivotal moments and historic protests that shaped the current landscape of the music industry today.