From UFO sightings witnessed by thousands to missing civilizations with evidence left in their wake, North America is filled with unresolved questions and mysteries.

Sightings of the Yeti, a creature of myth and legend, has been recorded for thousands of years throughout the Himalayas and surrounding regions; a seven-foot-tall creature, covered in shaggy gray hair is hiding in plain sight.

Finally back up on the mountain, Kevin hauls as much red cedar as he can; Sarah helps with a massive reforestation effort and gets Kevin to create a custom wooden table for a client in California.

An iconic 1969 Road Runner gives Mike a run for his money and a crash course in bodywork; a client build cuts very close to home; while out on a simple errand to buy shelves, Mike manages to make a deal on something for his trusty companion, Lincoln.

The source of Slumach's lost gold.

Finally back up on the mountain, Kevin hauls as much red cedar as he can; Sarah helps with a massive reforestation effort and gets Kevin to create a custom wooden table for a client in California.

An iconic 1969 Road Runner gives Mike a run for his money and a crash course in bodywork; a client build cuts very close to home; while out on a simple errand to buy shelves, Mike manages to make a deal on something for his trusty companion, Lincoln.

Joining dedicated teams of agents at Canada's airports and seaports as they intercept visitors smuggling illegal contraband and tourists with tall stories.

A captain navigates troubled waters when he forgets to declare himself to the authorities.

Frank throws his back out and applies for a Purple Heart, while Hawkeye mourns the loss of a friend and sends an underage soldier home.

Hawkeye writes to his father detailing Radar's attempts at passing an exam and a sudden cooling of affections between Frank and Margaret.

One of the most chilling aviation mysteries in modern day: a Boeing 777, carrying 239 people, vanishes over the Indian Ocean; nearly a decade later, no one knows what really happened to Malaysia Flight 370.

Counting down 10 mysteries of the deep, from sunken continents to puzzling ruins on the ocean floor and even artifacts that might be remnants of Atlantis; these underwater mysteries could provide a record of extraterrestrial visitation.

"Ancient Aliens" is looking at alien petroglyphs around the world; from strange, human-like figures to flying craft and carvings of what appear to be astronauts.

On Jacques Vallee's work in the field of UFOs and his theories on alien life.

Frank throws his back out and applies for a Purple Heart, while Hawkeye mourns the loss of a friend and sends an underage soldier home.

Hawkeye writes to his father detailing Radar's attempts at passing an exam and a sudden cooling of affections between Frank and Margaret.

One of the most chilling aviation mysteries in modern day: a Boeing 777, carrying 239 people, vanishes over the Indian Ocean; nearly a decade later, no one knows what really happened to Malaysia Flight 370.

After an explosive experiment aimed at the mysterious Bubble, the team examines the incredible phenomena they have discovered on Skinwalker Ranch with a number of world renown experts and scientists.

As the team finds more traces of treasure in the Money Pit, they discover a clue that may guide them to the ultimate answers on Oak Island.

Across time and cultures civilizations have preserved remarkably similar accounts of sky beings who bestowed the foundational elements of civilization, language, mathematics, architecture, medicine, and astronomy.

One of the most chilling aviation mysteries in modern day: a Boeing 777, carrying 239 people, vanishes over the Indian Ocean; nearly a decade later, no one knows what really happened to Malaysia Flight 370.

Across time and cultures civilizations have preserved remarkably similar accounts of sky beings who bestowed the foundational elements of civilization, language, mathematics, architecture, medicine, and astronomy.

On Jacques Vallee's work in the field of UFOs and his theories on alien life.

"Ancient Aliens" is looking at alien petroglyphs around the world; from strange, human-like figures to flying craft and carvings of what appear to be astronauts.

Counting down 10 mysteries of the deep, from sunken continents to puzzling ruins on the ocean floor and even artifacts that might be remnants of Atlantis; these underwater mysteries could provide a record of extraterrestrial visitation.

Frank throws his back out and applies for a Purple Heart, while Hawkeye mourns the loss of a friend and sends an underage soldier home.

Hawkeye writes to his father detailing Radar's attempts at passing an exam and a sudden cooling of affections between Frank and Margaret.

With the mill still desperately short of red cedar, Kevin moves his log salvaging operation to Barkley Sound to chase bigger logs; Sarah hustles to keep her clients happy.

Mike struggles to finish the restoration of a legendary muscle car, and trading gets chaotic when he goes up against The Great White Shark; one of Rust Valley's own heads to The Detroit Autorama with a 1964 Acadian.

The expedition continues as Adam and Kru's discovery of a hidden mine sends the entire team back, deep into the British Columbia wilderness; they're equipped for adventure and on a mission for gold.

With the mill still desperately short of red cedar, Kevin moves his log salvaging operation to Barkley Sound to chase bigger logs; Sarah hustles to keep her clients happy.

Mike struggles to finish the restoration of a legendary muscle car, and trading gets chaotic when he goes up against The Great White Shark; one of Rust Valley's own heads to The Detroit Autorama with a 1964 Acadian.

An American arrives at customs with firearms; a traveler makes a breathtaking statement.

An irritated traveler pushes officers to the limit; Haitian fruits may contain more than vitamins.

During a cold snap, a pair of long johns sent to Hawkeye from home becomes a much-sought-after commodity.

While settling down to listen to the Army-Navy game, the 4077th is bombarded and left with an unexploded bomb to defuse.

After humanity ceases to exist, the homes we built from suburban mansions and Miami condos to rural farmhouses face a relentless siege by fire, flood, wildlife and time.

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

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.

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

During a cold snap, a pair of long johns sent to Hawkeye from home becomes a much-sought-after commodity.

While settling down to listen to the Army-Navy game, the 4077th is bombarded and left with an unexploded bomb to defuse.

After humanity ceases to exist, the homes we built from suburban mansions and Miami condos to rural farmhouses face a relentless siege by fire, flood, wildlife and time.

Across time and cultures civilizations have preserved remarkably similar accounts of sky beings who bestowed the foundational elements of civilization, language, mathematics, architecture, medicine, and astronomy.

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.

Forget the monsters under your bed; the real ones, from dinosaurs to mythic beasts, are out there just waiting to be unearthed.

After humanity ceases to exist, the homes we built from suburban mansions and Miami condos to rural farmhouses face a relentless siege by fire, flood, wildlife and time.

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.

Forget the monsters under your bed; the real ones, from dinosaurs to mythic beasts, are out there just waiting to be unearthed.

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

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.

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

During a cold snap, a pair of long johns sent to Hawkeye from home becomes a much-sought-after commodity.

While settling down to listen to the Army-Navy game, the 4077th is bombarded and left with an unexploded bomb to defuse.

After Kevin almost loses his log salvaging bounty, he heads back up the mountainside to blast a huge boulder in his way, while the risk of forest fires threatens to shut him down.

Mike gives Cassidy the opportunity to take charge on a restoration; Avery finds pieces of a 1942 Harley Davidson buried among Mike's junk and recruits a local motorcycle legend to help him restore it to its former glory; Mike tries to gold snipe.

What secrets lurk at the bottom of Harrison Lake?; Adam and Kru follow the trail of a prospector's coin to a deserted island with a rich history, both above and below the water.

After Kevin almost loses his log salvaging bounty, he heads back up the mountainside to blast a huge boulder in his way, while the risk of forest fires threatens to shut him down.

Mike gives Cassidy the opportunity to take charge on a restoration; Avery finds pieces of a 1942 Harley Davidson buried among Mike's junk and recruits a local motorcycle legend to help him restore it to its former glory; Mike tries to gold snipe.

Packaged sweets at JFK Airport; a Dutch visitor travels stateside; mistaken identity for a traveler in Washington State; party girls' plans are deflated.

Officers don't believe a traveler's claims; a Canadian traveler is upset; clearance issues for a package from China.

After a bad session in the O.R., Hawkeye quarrels with Frank over his inadequacies, then finds one of his own patients is sinking fast.

When Frank threatens to leave, Hawkeye and Trapper find it means double duty for them and invent a way to make him stay.

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.

Mike meets a passionate Connecticut picker with major inventory-but getting access to his collection means dismantling a massive, layered wall of stuff.

Mike makes moves on a bonanza of rare signs and surfboards; Robbie and Jersey scour a Vermont homestead's classic car boneyard.

Mike and Jersey go wild for an eclectic Kentucky stockpile. And, Mike steps up with a high-flying bid for the Holy Grail of vintage motorbikes.

After a bad session in the O.R., Hawkeye quarrels with Frank over his inadequacies, then finds one of his own patients is sinking fast.

When Frank threatens to leave, Hawkeye and Trapper find it means double duty for them and invent a way to make him stay.

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.

Forget the monsters under your bed; the real ones, from dinosaurs to mythic beasts, are out there just waiting to be unearthed.

History is full of people pushing the limits, but some are more astonishing than others; like the man who single-handedly liberated a town during World War II; or an epic robbery in Buenos Aires that was pulled off with zero casualties.

Four blade smiths turn snowflake canister Damascus into a deadly Yakut knife in freezing temperatures; after brutal testing, two competitors head home to tackle another Siberian staple.

Mike nails a double deal at a Utah motorcycle museum; Robbie and Jersey scour a shuttered family museum that hasn't been touched in decades.

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.

Four blade smiths turn snowflake canister Damascus into a deadly Yakut knife in freezing temperatures; after brutal testing, two competitors head home to tackle another Siberian staple.

Mike nails a double deal at a Utah motorcycle museum; Robbie and Jersey scour a shuttered family museum that hasn't been touched in decades.

Mike meets a passionate Connecticut picker with major inventory-but getting access to his collection means dismantling a massive, layered wall of stuff.

Mike makes moves on a bonanza of rare signs and surfboards; Robbie and Jersey scour a Vermont homestead's classic car boneyard.

Mike and Jersey go wild for an eclectic Kentucky stockpile. And, Mike steps up with a high-flying bid for the Holy Grail of vintage motorbikes.

After a bad session in the O.R., Hawkeye quarrels with Frank over his inadequacies, then finds one of his own patients is sinking fast.

When Frank threatens to leave, Hawkeye and Trapper find it means double duty for them and invent a way to make him stay.

Just as Kevin gets back to his timber claim, the risk of forest fires shuts him down before he can get started; forced back to log salvaging, he discovers his boat might not be up to the task.

Connor's out to avenge the Rust Bros' failure at last year's demolition derby, but gets more than he expected when Avery and Shafin enter a car of their own; Mike restores a 1965 GMC van with an emotional past.

Legends collide when Adam leads the team 200 km east to B.C.'s Similkameen Valley following a lifelong legend hunter and his quest to rewrite history; Taylor and Kru visit a local knowledge keeper whose path to gold leads to a surprising discovery.

Just as Kevin gets back to his timber claim, the risk of forest fires shuts him down before he can get started; forced back to log salvaging, he discovers his boat might not be up to the task.

Connor's out to avenge the Rust Bros' failure at last year's demolition derby, but gets more than he expected when Avery and Shafin enter a car of their own; Mike restores a 1965 GMC van with an emotional past.

A traveler returns from Colombia with a lot of luggage; a pregnant passenger in Detroit; a package from India is halted; a traveler is Washington is questioned.

An auto theft arrest in Detroit; dozens of vials in the JFK Mail Facility; an American traveler has reptiles; a traveler in New York shows signs of smuggling; a family reunites in Detroit.

News spreads throughout the camp that a cease-fire is imminent.

While an entertainer does a show from an improvised stage in the compound, the comedy and drama of the doctors' lives go on.

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.

Roli completes his electric car; a family truck for MLB pitcher Matt Mantei.

A couple wants a Count's Kustoms bike; the crew builds a bike for Sharon, who lost a leg.

Danny buys fire-damaged '78 Lincoln; Danny and Horny Mike find a Cadillac limo in a driveway, but the owner calls the cops.

Danny buys a '69 Caddy on an impulse; rockers Judas Priest pick up a gift.

Danny must create a special bike for Mike; Danny finds a rare Corvette in a driveway; the crew argues over horsepower in a Camaro.

Danny and the gang go to the Las Vegas Speedway for Ford Mustang's 50th Anniversary Celebration; Danny takes over an '86 Chevy pickup project.

News spreads throughout the camp that a cease-fire is imminent.

While an entertainer does a show from an improvised stage in the compound, the comedy and drama of the doctors' lives go on.

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.

Four blade smiths turn snowflake canister Damascus into a deadly Yakut knife in freezing temperatures; after brutal testing, two competitors head home to tackle another Siberian staple.

A forgotten manuscript in a dusty trunk; a priceless painting discovered in plain sight; a royal tomb hidden for millennia beneath the sands; these famous finds prove history's greatest treasures often resurface when least expected.

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.

Scooter and Muskie Todd split from the convoy and blast deeper into the wilderness, where Scooter's truck vanishes into a drift left by a recent blizzard; Bill sends reinforcements as Todd and Lisa battle to complete their mission.

A forgotten manuscript in a dusty trunk; a priceless painting discovered in plain sight; a royal tomb hidden for millennia beneath the sands; these famous finds prove history's greatest treasures often resurface when least expected.

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.

Scooter and Muskie Todd split from the convoy and blast deeper into the wilderness, where Scooter's truck vanishes into a drift left by a recent blizzard; Bill sends reinforcements as Todd and Lisa battle to complete their mission.

Roli completes his electric car; a family truck for MLB pitcher Matt Mantei.

A couple wants a Count's Kustoms bike; the crew builds a bike for Sharon, who lost a leg.

Danny buys fire-damaged '78 Lincoln; Danny and Horny Mike find a Cadillac limo in a driveway, but the owner calls the cops.

Danny buys a '69 Caddy on an impulse; rockers Judas Priest pick up a gift.

Danny must create a special bike for Mike; Danny finds a rare Corvette in a driveway; the crew argues over horsepower in a Camaro.

Danny and the gang go to the Las Vegas Speedway for Ford Mustang's 50th Anniversary Celebration; Danny takes over an '86 Chevy pickup project.

News spreads throughout the camp that a cease-fire is imminent.

While an entertainer does a show from an improvised stage in the compound, the comedy and drama of the doctors' lives go on.

Kevin and his crew give it their all in a last ditch effort to salvage a million dollars' worth of logs, but neither he nor Sarah know if they'll reach their goal.

Mike bites off more than he can chew when he helps out with a 1938 Buick Special for an employee, while also racing to finish a 1965 GMC Handi-Van for clients hoping to make up for past mistakes; Mike and Avery train for a local dance competition.

After numerous failed attempts in the B.C. backwoods, European gold hunter Anton Lennartz and his team return to the Pitt to find the gold and claim the glory; Adam and Daryl track the trio with a plan of their own.

Kevin and his crew give it their all in a last ditch effort to salvage a million dollars' worth of logs, but neither he nor Sarah know if they'll reach their goal.

Mike bites off more than he can chew when he helps out with a 1938 Buick Special for an employee, while also racing to finish a 1965 GMC Handi-Van for clients hoping to make up for past mistakes; Mike and Avery train for a local dance competition.

JFK Airport officials look for drugs in backpacks; a driver in Washington arrives in someone else's vehicle; a Detroit citizen takes a wrong turn.

The canine unit uncovers trouble in Michigan; blood-stained baggage in Detroit; officers are suspicious of a Canadian citizen.

The personnel of the 4077th try to make a good impression on a psychiatrist when threatened with reassignment.

Daily bombing near the hospital by an inept North Korean pilot becomes the leading spectator sport at the 4077th.

Wondering about bizarre things that have fallen from the sky; from meteorites to seafood, and even bathtubs, these are some unbelievable stories of what comes from above.

For centuries, mankind has wondered what lies hidden in the depths of the Earth; for instance, the military secrets that underground bases like Area 51 and the Cheyenne Mountain Complex hold.

Deep within the recesses of the US government archives are secrets that will never see the light of day; but thanks to eyewitness encounters and devoted research many odd events are being uncovered and re-examined.

From lone operatives to agents of powerful regimes, assassins have left a trail of disruption that echoes through time; are assassins merely footnotes in history, or have they steered the destiny of civilization all along?

The personnel of the 4077th try to make a good impression on a psychiatrist when threatened with reassignment.

Daily bombing near the hospital by an inept North Korean pilot becomes the leading spectator sport at the 4077th.

Wondering about bizarre things that have fallen from the sky; from meteorites to seafood, and even bathtubs, these are some unbelievable stories of what comes from above.

Do the chemicals found on two fishermen's clothes prove they were abducted by aliens?; are UFOs monitoring our military? What is the transparent four-foot-tall figure spotted by hikers in Bolivia?

From lone operatives to agents of powerful regimes, assassins have left a trail of disruption that echoes through time; are assassins merely footnotes in history, or have they steered the destiny of civilization all along?

From strange afflictions to infections that ravage populations, it's frightening to think that one of us can contract dangerous and often deadly diseases.

A brush with death is terrifying enough-but these stories take survival to the extreme; like fending off a black bear while dangling off a cliff; drifting through shark-infested waters with nothing but a pair of rubber boots to stay afloat; just when you think skydiving is the real danger-try crash-landing into a nest of thousands of angry fire ants.

After an explosive experiment aimed at the mysterious Bubble, the team examines the incredible phenomena they have discovered on Skinwalker Ranch with a number of world renown experts and scientists.

From strange afflictions to infections that ravage populations, it's frightening to think that one of us can contract dangerous and often deadly diseases.

A brush with death is terrifying enough-but these stories take survival to the extreme; like fending off a black bear while dangling off a cliff; drifting through shark-infested waters with nothing but a pair of rubber boots to stay afloat; just when you think skydiving is the real danger-try crash-landing into a nest of thousands of angry fire ants.

For centuries, mankind has wondered what lies hidden in the depths of the Earth; for instance, the military secrets that underground bases like Area 51 and the Cheyenne Mountain Complex hold.

Deep within the recesses of the US government archives are secrets that will never see the light of day; but thanks to eyewitness encounters and devoted research many odd events are being uncovered and re-examined.

From lone operatives to agents of powerful regimes, assassins have left a trail of disruption that echoes through time; are assassins merely footnotes in history, or have they steered the destiny of civilization all along?

The personnel of the 4077th try to make a good impression on a psychiatrist when threatened with reassignment.

Daily bombing near the hospital by an inept North Korean pilot becomes the leading spectator sport at the 4077th.

The team in Bute Inlet continues to follow new leads in search of answers regarding a missing or murdered prospector, while David Muise inches closer to gold in Pitt Lake.

A hidden 1940s map reveals new clues pointing to the motherlode; the team races season-ending weather through unexplored terrain to find an X that marks the spot where Slumach possibly found his gold.

When a bear charges a group of remote researchers, a Conservation Officer deals with the potentially life-threatening situation, and Ray takes on a challenging recovery that bested two tow companies before him.

The team in Bute Inlet continues to follow new leads in search of answers regarding a missing or murdered prospector, while David Muise inches closer to gold in Pitt Lake.

A hidden 1940s map reveals new clues pointing to the motherlode; the team races season-ending weather through unexplored terrain to find an X that marks the spot where Slumach possibly found his gold.

Santa Claus is a beloved figure and face on Earth, a symbol of hope and goodwill; the story of the creative minds, brands, and major events that shaped the image of St. Nick.

The Christmas crazes that helped transform holiday shopping into the frantic, no-holds-barred $1.1 trillion frenzy that it is today; each season's must-have toy sends desperate shoppers to unbelievable lengths just to buy it.

A look at the enormous prices people have paid over the last three decades to get their hands on the cherished toys they have always wanted.

Early American malls had no food court, until a cinnamon bun, a pretzel, and a panda all move in to create three of the world's most iconic food brands and transform the American Mall.

Stephen Whitman introduces Americans to chocolate candy in a sampler box; Russell Stover builds a competing company; both brands help turn chocolate from an unknown import to a boxed American staple, given as a gift of love to this day.

Jim Folger discovers a new way to bring coffee to the masses; then another famous coffee brand gets its big break at the Maxwell House Hotel in Nashville; the creation of then coffee machines that help make coffee a billion-dollar industry.

A German immigrant looks to revolutionize the American beer industry when he's handed a struggling brewery; his signature beer will go on to amass sales of over 11 billion dollars a year.

A farmhand named Jack Daniel and a distiller in Tennessee look to bring their quality bootleg whiskey out of the shadows into a larger market; a new recipe and Daniel's revolutionary branding tactics pave the way for an American whiskey.

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 look at the enormous prices people have paid over the last three decades to get their hands on the cherished toys they have always wanted.

The Christmas crazes that helped transform holiday shopping into the frantic, no-holds-barred $1.1 trillion frenzy that it is today; each season's must-have toy sends desperate shoppers to unbelievable lengths just to buy it.

Santa Claus is a beloved figure and face on Earth, a symbol of hope and goodwill; the story of the creative minds, brands, and major events that shaped the image of St. Nick.

Tan is left reeling when his girlfriend is kidnapped; a violent cartel leader may be behind the abduction.

When back-to-back shootings at women's clinics leave two healthcare providers dead, Hondo and the team investigate whether the shootings were politically motivated.

When two students are brutally attacked, 20-Squad contends with a possible honor killing; Hondo and Nichelle have their first parenting dispute while searching for a suitable daycare.

Tan is left reeling when his girlfriend is kidnapped; a violent cartel leader may be behind the abduction.

When back-to-back shootings at women's clinics leave two healthcare providers dead, Hondo and the team investigate whether the shootings were politically motivated.

When two students are brutally attacked, 20-Squad contends with a possible honor killing; Hondo and Nichelle have their first parenting dispute while searching for a suitable daycare.

Santa Claus is a beloved figure and face on Earth, a symbol of hope and goodwill; the story of the creative minds, brands, and major events that shaped the image of St. Nick.

The Christmas crazes that helped transform holiday shopping into the frantic, no-holds-barred $1.1 trillion frenzy that it is today; each season's must-have toy sends desperate shoppers to unbelievable lengths just to buy it.

A look at the enormous prices people have paid over the last three decades to get their hands on the cherished toys they have always wanted.

In North Carolina, Mike, and Jersey dive into a mad-scientist collection of antique quackery and medical equipment; in California, Larry's barn features a multi-generational stockpile of vintage motorbikes, cars, and leather gear.

While Beat constructs a luxury fishing lodge in northern British Columbia, Bryan Jr. gives the local gun shop a much-needed facelift; Peter joins forces with his former crane operator, Nelly, to build a sandbox on steroids for her baby girl.

Bryan builds a log smoker; Beat creates a summer home; Joel converts his kids' playhouse into a mini man-cave.

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.

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.

Scooter and Muskie Todd split from the convoy and blast deeper into the wilderness, where Scooter's truck vanishes into a drift left by a recent blizzard; Bill sends reinforcements as Todd and Lisa battle to complete their mission.

Do certain weapons recorded in the pages of history, like the dagger of King Tut or the Swords of Damascus, actually contain incredible power?

Forget the monsters under your bed; the real ones, from dinosaurs to mythic beasts, are out there just waiting to be unearthed.

A brush with death is terrifying enough-but these stories take survival to the extreme; like fending off a black bear while dangling off a cliff; drifting through shark-infested waters with nothing but a pair of rubber boots to stay afloat; just when you think skydiving is the real danger-try crash-landing into a nest of thousands of angry fire ants.

Tan is left reeling when his girlfriend is kidnapped; a violent cartel leader may be behind the abduction.

When back-to-back shootings at women's clinics leave two healthcare providers dead, Hondo and the team investigate whether the shootings were politically motivated.

When two students are brutally attacked, 20-Squad contends with a possible honor killing; Hondo and Nichelle have their first parenting dispute while searching for a suitable daycare.

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.

Do certain weapons recorded in the pages of history, like the dagger of King Tut or the Swords of Damascus, actually contain incredible power?

Studying stories of revenge, such as the one about a man in Colorado that uses a killdozer to settle a zoning dispute or another about an emperor who pickles his wife's lover; exploring vengeance seekers who take things too far.

A brush with death is terrifying enough-but these stories take survival to the extreme; like fending off a black bear while dangling off a cliff; drifting through shark-infested waters with nothing but a pair of rubber boots to stay afloat; just when you think skydiving is the real danger-try crash-landing into a nest of thousands of angry fire ants.

Forget the monsters under your bed; the real ones, from dinosaurs to mythic beasts, are out there just waiting to be unearthed.

While investigating a potentially ancient marker stone on Oak Island, the team makes stunning new discoveries.

A brush with death is terrifying enough-but these stories take survival to the extreme; like fending off a black bear while dangling off a cliff; drifting through shark-infested waters with nothing but a pair of rubber boots to stay afloat; just when you think skydiving is the real danger-try crash-landing into a nest of thousands of angry fire ants.

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.

While investigating a potentially ancient marker stone on Oak Island, the team makes stunning new discoveries.

Forget the monsters under your bed; the real ones, from dinosaurs to mythic beasts, are out there just waiting to be unearthed.

Studying stories of revenge, such as the one about a man in Colorado that uses a killdozer to settle a zoning dispute or another about an emperor who pickles his wife's lover; exploring vengeance seekers who take things too far.

Do certain weapons recorded in the pages of history, like the dagger of King Tut or the Swords of Damascus, actually contain incredible power?

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.

Kevin has grand plans to use his million-dollar savings to finish incomplete projects and expand his business, but the weather and his rickety boats aren't cooperating; Sarah isn't on board with his new plan.

A visit to Avery's family farm leads to a discovery of unexpected treasures and puts Mike's veterinary skills to the test; A new member of the Rust Valley rat rod community needs help; Mike's '68 Chevelle SS comes back from the dead.

Is Slumach's gold guarded by Bigfoot? Legend hunter Randy Brisson and his archive of evidence suggests the location of Slumach's mine and the legend of the Sasquatch converge; Adam and Kru climb the high-altitude rocky spires of Tooth Pass.

Kevin has grand plans to use his million-dollar savings to finish incomplete projects and expand his business, but the weather and his rickety boats aren't cooperating; Sarah isn't on board with his new plan.

A visit to Avery's family farm leads to a discovery of unexpected treasures and puts Mike's veterinary skills to the test; A new member of the Rust Valley rat rod community needs help; Mike's '68 Chevelle SS comes back from the dead.

A traveler with a questionable past; contraband in the mail facility; officers inspect passengers at JFK; a fugitive shows up.

An inside smuggling job is revealed at JFK; a wrong turn separates friends; German tourists in Washington; a baggage exam in Detroit.

Unrequited love, death, danger, duty and tomfoolery make up a typical day in the 4077th. Guest starring Joan Van Ark.

Hawkeye and Trapper are determined to make an issue of the accidental shelling of a South Korean village by U.S. artillery.

In 1997, thousands of people across Phoenix witness a series of strange lights unlike anything they've ever seen; many think this could be one of the largest-scale UFO sightings in history, but there may be another explanation.

Giorgio Tsoukalos looks at mysterious teachers who have appeared throughout history, including a biblical patriarch, a race of fish-people and Egypt's most controversial Pharoah.

Giorgio Tsoukalos takes a look back at the top 10 reports of encounters with strange and mysterious beasts that have been investigated on "Ancient Aliens.".

Stories of god-like beings providing instruction to early humans, helping establish the first civilizations; exploring if mysterious figures who appear throughout history provide evidence that these otherworldly teachers have been here all along.

Unrequited love, death, danger, duty and tomfoolery make up a typical day in the 4077th. Guest starring Joan Van Ark.

Hawkeye and Trapper are determined to make an issue of the accidental shelling of a South Korean village by U.S. artillery.

With over 7,500 hours investigating the mystery; top D.B. Cooper expert Eric Ulis believes that he's found the true location where Cooper landed during his daring dive.

While investigating a potentially ancient marker stone on Oak Island, the team makes stunning new discoveries.

From elaborate ceremonies featuring garments strangely reminiscent of space suits to masked dancers with alien-like faces, human history is rich with traditions that seem to honor mysterious beings from the sky.

In 1997, thousands of people across Phoenix witness a series of strange lights unlike anything they've ever seen; many think this could be one of the largest-scale UFO sightings in history, but there may be another explanation.

From elaborate ceremonies featuring garments strangely reminiscent of space suits to masked dancers with alien-like faces, human history is rich with traditions that seem to honor mysterious beings from the sky.

Giorgio Tsoukalos looks at mysterious teachers who have appeared throughout history, including a biblical patriarch, a race of fish-people and Egypt's most controversial Pharoah.

Giorgio Tsoukalos takes a look back at the top 10 reports of encounters with strange and mysterious beasts that have been investigated on "Ancient Aliens.".

Stories of god-like beings providing instruction to early humans, helping establish the first civilizations; exploring if mysterious figures who appear throughout history provide evidence that these otherworldly teachers have been here all along.

Unrequited love, death, danger, duty and tomfoolery make up a typical day in the 4077th. Guest starring Joan Van Ark.

Hawkeye and Trapper are determined to make an issue of the accidental shelling of a South Korean village by U.S. artillery.

Kevin struggles with a broken processor to get his logs off the mountain before snow closes the roads; his plans to launch the Seacrest go sideways; back at the mill, Sarah has a good idea for a side business that could make them a lot of money.

Mike restores a 1969 El Camino for his son Connor to race in a high-stakes Hit to Pass competition; Rust Bros' biggest rivalry gets nasty when they realize that not everyone is playing by the rules.

A newly discovered video and an old recording of a phone conversation shine a spotlight on a 40-year-old claim that Slumach's gold was found and mined in the 1980s.

Kevin struggles with a broken processor to get his logs off the mountain before snow closes the roads; his plans to launch the Seacrest go sideways; back at the mill, Sarah has a good idea for a side business that could make them a lot of money.

Mike restores a 1969 El Camino for his son Connor to race in a high-stakes Hit to Pass competition; Rust Bros' biggest rivalry gets nasty when they realize that not everyone is playing by the rules.

An inside smuggling job is revealed at JFK; a wrong turn separates friends; German tourists in Washington; a baggage exam in Detroit.

Canines in Chicago sniff out cash; a Canadian vehicle is seedy; officers discover a traveler's alter ego; officers sift through suspicious leaves.

After three days of near-continuous duty, Hawkeye's behavior becomes wackier than usual.

A small Korean boy with minor injuries captures the hearts of all in the 4077th.

Hidden dangers once held at bay by humans erupt with force, from everyday objects ready to explode to chemical plants and locust plagues; as nature and human legacy collide, these ticking time bombs threaten to send the world up in smoke.

Most of the world's holiest places sit in plain sight, able to be seen and experienced, but there are some hidden deep underground.

England's Stonehenge and the Moai statues of Easter Island have inspired awe for centuries; marveling at their ambitious construction and at the determination of the people who built them.

For centuries, powerful artifacts have sparked wars, inspired legends and shaped empires; from divine weapons, to formidable places, to sacred relics, these are the incredible stories of the world's most mighty marvels.

After three days of near-continuous duty, Hawkeye's behavior becomes wackier than usual.

A small Korean boy with minor injuries captures the hearts of all in the 4077th.

Hidden dangers once held at bay by humans erupt with force, from everyday objects ready to explode to chemical plants and locust plagues; as nature and human legacy collide, these ticking time bombs threaten to send the world up in smoke.

From elaborate ceremonies featuring garments strangely reminiscent of space suits to masked dancers with alien-like faces, human history is rich with traditions that seem to honor mysterious beings from the sky.

Why has an Italian sighting puzzled UFO experts for decades? Did a Calgary resident record footage of a legendary Canadian lake monster? Do an ancient pair of footprints prove giants once walked the earth? How does an eight-year-old girl climb walls like Spiderman? Tony and his team of experts examine the evidence to find the truth.

From a bat swung by one of baseball's boldest pioneers, to an iconic painting hidden behind a false wall, and even a relic tied to our nation's first president, these astonishing finds prove that America's greatest treasures can turn up in the most unlikely places.

Hidden dangers once held at bay by humans erupt with force, from everyday objects ready to explode to chemical plants and locust plagues; as nature and human legacy collide, these ticking time bombs threaten to send the world up in smoke.

Why has an Italian sighting puzzled UFO experts for decades? Did a Calgary resident record footage of a legendary Canadian lake monster? Do an ancient pair of footprints prove giants once walked the earth? How does an eight-year-old girl climb walls like Spiderman? Tony and his team of experts examine the evidence to find the truth.

From a bat swung by one of baseball's boldest pioneers, to an iconic painting hidden behind a false wall, and even a relic tied to our nation's first president, these astonishing finds prove that America's greatest treasures can turn up in the most unlikely places.

Most of the world's holiest places sit in plain sight, able to be seen and experienced, but there are some hidden deep underground.

England's Stonehenge and the Moai statues of Easter Island have inspired awe for centuries; marveling at their ambitious construction and at the determination of the people who built them.

For centuries, powerful artifacts have sparked wars, inspired legends and shaped empires; from divine weapons, to formidable places, to sacred relics, these are the incredible stories of the world's most mighty marvels.

After three days of near-continuous duty, Hawkeye's behavior becomes wackier than usual.

A small Korean boy with minor injuries captures the hearts of all in the 4077th.

Things are starting to look up as Kevin repairs his broken machines and makes progress on his plan to build a breakwater and doc at Hook Bay.

Mike refuses to sell an old clunker to a pair of serious buyers and instead takes on the challenging restoration of a 1967 Mercury Cougar with a tragic past; Avery goes head to head with Mike at the local swap meet.

Adam and Kru navigate a vertical mud bog to access a remote lake perched 1000 feet high in the Pitt; Taylor and Don search the Vancouver Police archives for clues as they investigate the man responsible for Slumach's arrest and execution.

Things are starting to look up as Kevin repairs his broken machines and makes progress on his plan to build a breakwater and doc at Hook Bay.

Mike refuses to sell an old clunker to a pair of serious buyers and instead takes on the challenging restoration of a 1967 Mercury Cougar with a tragic past; Avery goes head to head with Mike at the local swap meet.

In Chicago, officers find some bad medicine; hikers get into trouble; an architect's story seems sketchy.

A traveler returns from Colombia with a lot of luggage; a pregnant passenger in Detroit; a package from India is halted; a traveler is Washington is questioned.

An enlisted man who wants to marry a Korean girl comes to Hawkeye for help.

Hot Lips and Frank challenge Henry's fitness to command by reporting the activities of the 4077th to the Army brass.

Santa Claus is a beloved figure and face on Earth, a symbol of hope and goodwill; the story of the creative minds, brands, and major events that shaped the image of St. Nick.

Postwar peace and prosperity reveals a demand for more challenging pastimes; after decades of struggle, three different innovators break the mold to release games that combine fun with an intellectual challenge: Scrabble, Clue and Yahtzee.

The Teenage Mutant Ninja Turtles high kick their way into the action figure market in the late 1980s, opening the door for a new kind of martial arts toy; their place at the top is soon challenged by a mighty morphin phenomenon.

Two chance discoveries in the 1950s turn mundane industrial materials into legendary toys; Etch A Sketch and Play-Doh will rake in billions for decades to come, but not everyone will reap the rewards.

Thanks to the industry-defining innovations of three men through the creation of games like Super Mario Brothers, The Legend of Zelda, and Pokémon, Nintendo goes from a struggling playing card company to a video game juggernaut.

In 1983, underdog company Tonka sets out to bring the transformable robot from Japan to America, but they're soon confronted by an industry giant as Hasbro has its own competing toy line.