The residents of Port Protection build a life-changing tool.

In Port Protection, good friends equal survival, as one hand helps another.

Sam and Squibb attempt to salvage an unwieldy boat mast.

Human bones are found inside luggage; a pair fails to declare thousands of dollars in jewelry; a mysterious powder is masked by beauty products.

A traveler is caught with injections; officers smoke out marijuana residue; a mom may end up in jail due to a wrong turn.

A one-way ticket raises red flags; a traveler is caught with undeclared meat; officers find a loaded gun and live crab.

Officers find white powder in tea sacks; pills marked ICE are frozen; some furry foreigners arrive to spread good will.

Devastating flash floods threaten Dawson City.

Glass brought light into homes and put the world into focus; people use glass to protect ourselves, cure disease, and create artistic masterpieces.

A recurring mine marker points the team east to neighboring Harrison Lake as leads and legend line up; clues found in a 1950s article by an investigative reporter place a lost Spanish gold mine directly on Slumach's path.

Human bones are found inside luggage; a pair fails to declare thousands of dollars in jewelry; a mysterious powder is masked by beauty products.

A traveler is caught with injections; officers smoke out marijuana residue; a mom may end up in jail due to a wrong turn.

A one-way ticket raises red flags; a traveler is caught with undeclared meat; officers find a loaded gun and live crab.

Officers find white powder in tea sacks; pills marked ICE are frozen; some furry foreigners arrive to spread good will.

AMO seizes over 280 kilos of cocaine and $750,000 from smuggling vessels.

Caribbean AMO agents bust a smuggling ring and seize 1300 kilos of cocaine.

HSI arrests 37 gang members; AMO seizes $5.4 million worth of cocaine.

HSI arrests drug traffickers; AMO seizes $13.2 million of coke on a beach.

AMO seizes over $60 million of cocaine out at sea.

AMO seizes $8 million of coke; HSI foils a port smuggling operation.

AMO discovers over 80 kilos of cocaine washed ashore in St. Thomas.

Curly shoots a bear; Troy and Sarah struggle with a new water system.

Border Patrol finds a smuggling tunnel; CBP seizes silver bars and coke.

Milestone achievements are only possible with steep challenges in Port Protection; Carl and Matt pull a 3,000-gallon barrel up a cliff.

Curly shoots a bear; Troy and Sarah struggle with a new water system.

Border Patrol finds a smuggling tunnel; CBP seizes silver bars and coke.

Milestone achievements are only possible with steep challenges in Port Protection; Carl and Matt pull a 3,000-gallon barrel up a cliff.

AMO seizes over 280 kilos of cocaine and $750,000 from smuggling vessels.

Caribbean AMO agents bust a smuggling ring and seize 1300 kilos of cocaine.

HSI arrests 37 gang members; AMO seizes $5.4 million worth of cocaine.

HSI arrests drug traffickers; AMO seizes $13.2 million of coke on a beach.

A traveler is caught with cocaine-filled pen caps; a long stay alerts CBP; a probation-breaking welder feels the heat.

A fake ID is comes to light at the border; a young traveler's stories don't jibe; CBP hounds sniff out forbidden food.

Officers find a stash of luxury knockoffs; a drag race fan slows his roll; CBP catches a wanted duo.

A car's radiation levels alert CBP; an officer digs up a stash of deadly bath salts; multiple phones materialize.

Conservation Officer Logan has a close call while investigating a case of poaching; an aggressive grizzly bear ransacks a remote trapper's cabin.

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.

The source of Slumach's lost gold.

A traveler is caught with cocaine-filled pen caps; a long stay alerts CBP; a probation-breaking welder feels the heat.

A fake ID is comes to light at the border; a young traveler's stories don't jibe; CBP hounds sniff out forbidden food.

Officers find a stash of luxury knockoffs; a drag race fan slows his roll; CBP catches a wanted duo.

A car's radiation levels alert CBP; an officer digs up a stash of deadly bath salts; multiple phones materialize.

Mariana heads to Mexico to investigate the billion-dollar business of people-smuggling to the U.S., a system fueled by cartels and corruption.

Mariana goes inside the world of contract killers.

Mariana delves into a new scheme called sextortion, where compromising photos are used to extort victims; while searching for the scammer who targeted a young American, she uncovers a scam culture even more terrifying than she had imagined.

Mariana launches an investigation into a complex scam that targets seniors, tricking them into becoming drug mules.

Mariana's investigation into how gold mining is funding terrorism gets interrupted by a military coup that strands the team in Niger.

Mariana explores the growing influence of Mexican cartels in the U.S.

Mariana heads to a Southeast Asian hotbed of scamming, where criminal organizations are holding thousands of hostages and forcing them to scam.

Mariana investigates the mysterious next wave of America's opioid crisis.

A young CIA officer is kidnapped abroad, triggering a tense 24-hour standoff.

Mariana travels to Vietnam to investigate reports that young women are being trafficked into China to be sold as unwilling brides.

Mariana investigates the mysterious next wave of America's opioid crisis.

A young CIA officer is kidnapped abroad, triggering a tense 24-hour standoff.

Mariana travels to Vietnam to investigate reports that young women are being trafficked into China to be sold as unwilling brides.

Mariana heads to Mexico to investigate the billion-dollar business of people-smuggling to the U.S., a system fueled by cartels and corruption.

Mariana goes inside the world of contract killers.

Mariana delves into a new scheme called sextortion, where compromising photos are used to extort victims; while searching for the scammer who targeted a young American, she uncovers a scam culture even more terrifying than she had imagined.

Mariana launches an investigation into a complex scam that targets seniors, tricking them into becoming drug mules.

CBP converges on flights arriving from drug-source countries; a coffee expo volunteer finds trouble; pills are found in film containers.

A face-off develops over luxury counterfeits; agents detect potentially lethal powder; a CBP beagle finds the mother lode of meat.

Suspected of smuggling narcotics, a jittery traveler's next stop is a medical facility; a pair arrives bearing a trophy; CBP question a DJ's find.

A tourist's uncertain vacation plans make him suspicious; two backpackers return with more than just memories; in Port Huron, a traveler carries a concealed weapon.

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.

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.

It's up to Adam to push forward and guide the team through the uncharted terrain of Corbold Canyon.

CBP converges on flights arriving from drug-source countries; a coffee expo volunteer finds trouble; pills are found in film containers.

A face-off develops over luxury counterfeits; agents detect potentially lethal powder; a CBP beagle finds the mother lode of meat.

Suspected of smuggling narcotics, a jittery traveler's next stop is a medical facility; a pair arrives bearing a trophy; CBP question a DJ's find.

A tourist's uncertain vacation plans make him suspicious; two backpackers return with more than just memories; in Port Huron, a traveler carries a concealed weapon.

A tricky rescue of an excavator forces Thord to find solutions, but he's in double trouble when rookie Terje messes up.

Thord Paulsen and his colleagues must fight against snow and icy winds as they rescue cars and trucks on Norway's slippery mountain roads.

Thord Paulsen and his colleagues must fight against snow and icy winds as they rescue cars and trucks on Norway's slippery mountain roads.

Thord Paulsen and his colleagues must fight against snow and icy winds as they rescue cars and trucks on Norway's slippery mountain roads.

Thord takes tow truck driver, Erlend, along to rescue a crashed van near a graveyard at night; they end up spooked while trying to pull the van up the ice-covered slope of a 20 degree hill.

There is chaos on the main road after a truck driver skids on ice but refuses help from Thord; another vehicle runs into serious trouble and needs urgent rescue.

After a snowstorm, a car ends up crashed almost 65 yards into a field; Thord tries to tow it out, but he gets stressed when a winch failure jeopardizes the rescue.

The rescue operation is a tricky one as the truck in question is on the verge of tipping; Thord decides to entrust Bjorn with his life and crawls under the trailer during the pull.

A journey behind the scenes of Melbourne Airport to observe the team of dedicated professionals who work around the clock to ensure the airport runs safely and efficiently.

Thord Paulsen and his colleagues must fight against snow and icy winds as they rescue cars and trucks on Norway's slippery mountain roads.

The rescue operation is a tricky one as the truck in question is on the verge of tipping; Thord decides to entrust Bjorn with his life and crawls under the trailer during the pull.

A journey behind the scenes of Melbourne Airport to observe the team of dedicated professionals who work around the clock to ensure the airport runs safely and efficiently.

Thord Paulsen and his colleagues must fight against snow and icy winds as they rescue cars and trucks on Norway's slippery mountain roads.

A tricky rescue of an excavator forces Thord to find solutions, but he's in double trouble when rookie Terje messes up.

Thord Paulsen and his colleagues must fight against snow and icy winds as they rescue cars and trucks on Norway's slippery mountain roads.

Thord Paulsen and his colleagues must fight against snow and icy winds as they rescue cars and trucks on Norway's slippery mountain roads.

Thord Paulsen and his colleagues must fight against snow and icy winds as they rescue cars and trucks on Norway's slippery mountain roads.

Cameras follow U.S. border protection agencies as they man the front lines of national security.

Cameras follow U.S. border protection agencies as they man the front lines of national security.

Cameras follow U.S. border protection agencies as they man the front lines of national security.

Cameras follow U.S. border protection agencies as they man the front lines of national security.

Frigid temperatures wreak havoc on Dawson City, putting the fire department in danger; an avalanche shuts down the Klondike Highway and a tow operator races to find a driver who has plunged off-road and into an icy river.

The world is literally buzzing with insects; bees, spiders and insects of all shapes and sizes touch every aspect of life, they're the essential workers that pollinate food, clean up the dead and are an integral part of the ecosystem.

According to a 1980s author and historian, the Spanish have a long and hidden history of gold exploration in Pitt Lake, and Slumach found their cache.

Cameras follow U.S. border protection agencies as they man the front lines of national security.

Cameras follow U.S. border protection agencies as they man the front lines of national security.

Cameras follow U.S. border protection agencies as they man the front lines of national security.

Cameras follow U.S. border protection agencies as they man the front lines of national security.

Charles is worried about his dog Athena and looks to his dad for guidance.

From the North Pole to Dr. Pol, everyone is getting in the Christmas spirit.

The staffers become the clients when several of their pets fall ill.

The clinic works together to create an extra special surprise for Diane.

The Pols need to fix the sheep hut before winter arrives.

Everything feels connected as the vets see patterns emerge in their cases.

The clinic braces for a snowstorm as Doc races to an emergency farm call.

A pioneering gorilla treatment, rhino fitness tracker and tortoise party.

Australian bugs must battle Earth's fiercest forces to survive Down Under.

Discover how tiny bugs, and this series, are filmed.

Wildlife activist Benhail Antao insists on rescuing dangerous snakes despite being allergic to Russell's viper venom.

A pioneering gorilla treatment, rhino fitness tracker and tortoise party.

Australian bugs must battle Earth's fiercest forces to survive Down Under.

Discover how tiny bugs, and this series, are filmed.

Wildlife activist Benhail Antao insists on rescuing dangerous snakes despite being allergic to Russell's viper venom.

Charles is worried about his dog Athena and looks to his dad for guidance.

From the North Pole to Dr. Pol, everyone is getting in the Christmas spirit.

The staffers become the clients when several of their pets fall ill.

The clinic works together to create an extra special surprise for Diane.

Cameras follow U.S. border protection agencies as they man the front lines of national security.

In the American border, agents questions an African traveler with a one-way ticket; in Detroit, a passenger receives a special surprise; officers wait for a drug-smuggler to expulse a pack of cocaine.

An Asian woman arrives with an American man who is not her husband; CBP discover a large collection of vapes and vape oils in a traveler's luggage; an officer discovers undeclared items belonging to an American couple returning from Europe.

A traveler is suspected of smuggling cocaine; an officer questions a traveler with low funds and a lengthy travel plan; a family from Canada traveling with a puppy is barking up the wrong tree.

Multiple 911 calls push Dawson City to the brink as they battle to save a family home and a historic building, while snowstorms pummel Whitehorse, causing chaos and forcing a dangerous backcountry helicopter rescue mission.

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

Adam, Kru and Tony follow the path of a failed 1982 Vancouver news team led by a Slumach gold hunter and mystic dowser.

Cameras follow U.S. border protection agencies as they man the front lines of national security.

In the American border, agents questions an African traveler with a one-way ticket; in Detroit, a passenger receives a special surprise; officers wait for a drug-smuggler to expulse a pack of cocaine.

An Asian woman arrives with an American man who is not her husband; CBP discover a large collection of vapes and vape oils in a traveler's luggage; an officer discovers undeclared items belonging to an American couple returning from Europe.

A traveler is suspected of smuggling cocaine; an officer questions a traveler with low funds and a lengthy travel plan; a family from Canada traveling with a puppy is barking up the wrong tree.

Archaeologists investigate Egypt's ancient power struggle with the Nubians.

Archaeologists uncover the secrets and rivalries of Egypt's last dynasty.

Recounting the life of Chinggis Khan, beginning with the struggles of his early years, including his family's fall from power, his survival against rival tribes and his first alliances as a young warrior to rescue his kidnapped wife Borte.

Temujin's powers grow as he battles with Jamuqa; he is exiled, but he returns to unify the Mongol tribes when he takes the title of Chinggis Khan.

Genghis Khan built power by building an army and eliminating rivals; he begins conquests against the Tanguts and the Jin, expanding his empire.

When the neighboring empire attacks a Mongol caravan and Genghis Khan's envoys, he unleashes a campaign that annihilates the empire and solidifies Mongol dominance in Persia; he names his son Ogedei as his successor before his death.

Ogedei is proclaimed ruler of the Mongol Empire; he conquers Armenia, Georgia and the Jin Empire and builds the capital city of Karakorum.

Ogedei's death triggers a struggle for succession over the largest empire in the world.

Hannah Fry travels to Spain to decode its history and culture; she learns about the rhythms of flamenco, a mountain whistle language and the hidden symbolism in its urban planning.

This journey travels through Yunnan from Kunming's market to Pu'er, the starting point of the Tea-Horse Road.

Ogedei's death triggers a struggle for succession over the largest empire in the world.

Hannah Fry travels to Spain to decode its history and culture; she learns about the rhythms of flamenco, a mountain whistle language and the hidden symbolism in its urban planning.

This journey travels through Yunnan from Kunming's market to Pu'er, the starting point of the Tea-Horse Road.

Archaeologists investigate Egypt's ancient power struggle with the Nubians.

Archaeologists uncover the secrets and rivalries of Egypt's last dynasty.

Recounting the life of Chinggis Khan, beginning with the struggles of his early years, including his family's fall from power, his survival against rival tribes and his first alliances as a young warrior to rescue his kidnapped wife Borte.

Temujin's powers grow as he battles with Jamuqa; he is exiled, but he returns to unify the Mongol tribes when he takes the title of Chinggis Khan.

On her first solo trip, Steph Custance braves one of the longest ice crossings on the map; Darrell Ward attempts a triple delivery in a single day; an engine fire stops Lisa Kelly in her tracks; Todd Dewey celebrates his birthday stuck on a road.

As winter tightens its icy grip, the small, isolated community of West Dawson finds itself completely cut off from emergency services. Alone, Ray faces a string of dangerous solo vehicle retrieval missions on a storm-battered highway.

On her first solo trip, Steph Custance braves one of the longest ice crossings on the map; Darrell Ward attempts a triple delivery in a single day; an engine fire stops Lisa Kelly in her tracks; Todd Dewey celebrates his birthday stuck on a road.

As winter tightens its icy grip, the small, isolated community of West Dawson finds itself completely cut off from emergency services. Alone, Ray faces a string of dangerous solo vehicle retrieval missions on a storm-battered highway.

Dr. Oakley transports a bull by boat and sees chinchillas for a cuteness check.

Dr. Oakley treats a limping bison and a litter of puppies struggling to survive.

Dr. Oakley tries to outsmart a herd of bison and fights for the life of a cherished friend.

Dr. Oakley operates on an unusual mass and investigates a musk ox with a hair loss problem.

Dr. Oakley performs a checkup on two scrappy lynx, and Sierra takes charge on clinic day.

Back in the Yukon, the Oakleys help over 100 cattle and a rowdy mini mule.

Dr. Oakley treats a kitten with a bulging eye, and Sierra preg checks a miniature cow.

Dr. Oakley treats a beagle mix with a severely infected paw and rappels to an eagle's nest.

Dr. Oakley herds a group of unruly reindeer and treats a mini ram with a limp.

Dr. Oakley treats an electrocuted sloth and releases rescued animals back into the wild.

In Costa Rica, Dr. Oakley handles a pair of jaguars and a sloth in heat.

Dr. Oakley competes in a rodeo and treats a dog with persistent nosebleeds.

Dr. Oakley treats a sheep with a large growth and the eye of a tiny owl.

In Costa Rica, Dr. Oakley handles a pair of jaguars and a sloth in heat.

Dr. Oakley competes in a rodeo and treats a dog with persistent nosebleeds.

Dr. Oakley treats a sheep with a large growth and the eye of a tiny owl.

Dr. Oakley operates on an unusual mass and investigates a musk ox with a hair loss problem.

Dr. Oakley performs a checkup on two scrappy lynx, and Sierra takes charge on clinic day.

Back in the Yukon, the Oakleys help over 100 cattle and a rowdy mini mule.

Dr. Oakley treats a kitten with a bulging eye, and Sierra preg checks a miniature cow.

Todd Dewey must fix his truck or find himself stranded a hundred miles from the nearest town; Alex Debogorski confronts a creek in the middle of the road; Art Burke receives bad news; Lisa Kelly battles an ice crossing unlike any she's seen.

An avalanche risk forces a bombing mission above the Klondike Highway.

Todd Dewey must fix his truck or find himself stranded a hundred miles from the nearest town; Alex Debogorski confronts a creek in the middle of the road; Art Burke receives bad news; Lisa Kelly battles an ice crossing unlike any she's seen.

An avalanche risk forces a bombing mission above the Klondike Highway.

After aborting his mission last season, lone wolf prospector David Muise returns undeterred and looking for a partner.

Ben Horton explores Guizhou's mystical wilderness, iconic attractions and hidden marvels.

The devastating tsunami makes landfall, catching thousands unaware.

As the tsunami hits Thailand, tourists and locals fight for survival.

The wave hits Sri Lanka, and the world wakes up to news of the disaster.

After the tsunami, survivors on an island work together to save lives.

Hurricane Katrina looms over New Orleans, while residents face a chaotic evacuation; as the city scrambles to prepare, 100,000 are left behind.

New Orleans floods after the levees breach; residents try to evacuate, rescue efforts begin, and a chaotic atmosphere sets in.

Rescues persist as thousands are trapped at home, with others ushered to the Superdome; stories of resilience emerge amid media focus on violence.

Gen Honoré leads rescue efforts post-Katrina amid pressure to use force; evacuees face discrimination, and tensions rise as violence increases.

The future of a devastated New Orleans hangs in the balance as its residents struggle to return, rebuild and restore their lives even 20 years later.

Dive into the awe-inspiring world of Dutch engineering.

This film reveals the secrets of the UK's engineering wonders.

The future of a devastated New Orleans hangs in the balance as its residents struggle to return, rebuild and restore their lives even 20 years later.

Dive into the awe-inspiring world of Dutch engineering.

This film reveals the secrets of the UK's engineering wonders.

As the tsunami hits Thailand, tourists and locals fight for survival.

The wave hits Sri Lanka, and the world wakes up to news of the disaster.

After the tsunami, survivors on an island work together to save lives.

Hurricane Katrina looms over New Orleans, while residents face a chaotic evacuation; as the city scrambles to prepare, 100,000 are left behind.

CBP has beef with a traveler when they discover undeclared meat in his fiancé's luggage.

In Buffalo, officers search the vehicle of an American permanent resident; CBP are perplexed by a batch of ceramic pastries.

A family risks losing their stacks of cash; officers are on high alert after an American declares he is packing heat; CBP suspect a traveler is pulling a con job with his US work visa.

A CBP canine tracks a THC-toting traveler.

Frigid temperatures wreak havoc on Dawson City, putting the fire department in danger; an avalanche shuts down the Klondike Highway and a tow operator races to find a driver who has plunged off-road and into an icy river.

As the end of the season nears, Mark Kohaykewych makes a deal with rivals Darrell Ward and Lisa Kelly to join forces for a four-truck convoy; Alex Debogorski must complete one of the longest trails; Art Burke's truck gives out on the ice.

Nika and Chris face a repair they can't afford; Guillaume has trouble while Ken is gone; Karl asks his family for help; Bernie gets a surprise.

CBP has beef with a traveler when they discover undeclared meat in his fiancé's luggage.

In Buffalo, officers search the vehicle of an American permanent resident; CBP are perplexed by a batch of ceramic pastries.

A family risks losing their stacks of cash; officers are on high alert after an American declares he is packing heat; CBP suspect a traveler is pulling a con job with his US work visa.

A CBP canine tracks a THC-toting traveler.

HSI busts date-rape drug traffickers; CBP stops a car filled with cocaine.

CBP finds an SUV loaded with meth; AMO seizes nearly 2000 kilos of cocaine.

CBP seizes $500K worth of coke; HSI arrests an importer of illegal pills.

CBP and HSI track 25,000 ecstasy pills bound for Philadelphia from Germany.

CBP finds 100 kilos of coke in a banana shipment bound for a Philly bodega.

CBP detains a man suspected of swallowing drugs; AMO agents find $51 million of coke.

LA HSI executes undercover drug buys; CBP intercepts Coyotes at the border.

Residents tackle tasks at the height of summer's season of productivity.

HSI St. Louis pursues gun traffickers; CBP stops siblings hiding money.

With the help of Troy and Sarah, Squibb tackles a ticking time bomb that threatens to kill all life in the Bay.

Residents tackle tasks at the height of summer's season of productivity.

HSI St. Louis pursues gun traffickers; CBP stops siblings hiding money.

With the help of Troy and Sarah, Squibb tackles a ticking time bomb that threatens to kill all life in the Bay.

HSI busts date-rape drug traffickers; CBP stops a car filled with cocaine.

CBP finds an SUV loaded with meth; AMO seizes nearly 2000 kilos of cocaine.

CBP seizes $500K worth of coke; HSI arrests an importer of illegal pills.

CBP and HSI track 25,000 ecstasy pills bound for Philadelphia from Germany.

A traveler isn't blowing smoke when it comes to declaring her cigarettes.

A South American surfer's vague travel plans make waves with CBP.

A CBP canine is on the hunt for concealed contraband.

Planning a surprise visit to a married man could cause one traveler to be left at the airport; shocked by an undeclared stun gun, CBP race against time to find the owner before the plane boards.

Multiple 911 calls push Dawson City to the brink as they battle to save a family home and a historic building, while snowstorms pummel Whitehorse, causing chaos and forcing a dangerous backcountry helicopter rescue mission.

The truckers in the historic four-truck convoy face fire and a thin crossing; after Art Burke's engine dies, he must travel back to Winnipeg with Alex Debogorski over a trail that destroys his truck.

Breakdowns shut down Chris' mine; Big Al remembers his wife's death; Ken and Guillaume try to save their season; Bernie and his team have a big payoff.

A traveler isn't blowing smoke when it comes to declaring her cigarettes.

A South American surfer's vague travel plans make waves with CBP.

A CBP canine is on the hunt for concealed contraband.

Planning a surprise visit to a married man could cause one traveler to be left at the airport; shocked by an undeclared stun gun, CBP race against time to find the owner before the plane boards.

Every day our planet faces deadly threats; from earthquakes, viruses, tsunami's and extreme weather phenomenon, to threats from outer space in the form of radiation, asteroids and other space debris.

Ranking history's 10 most dramatic global disasters.

Ten of history's worst maritime disasters at sea.

Explore the 10 most dramatic structural collapses in history, from bridges to buildings.

When a dam fails, catastrophe follows; history's 10 worst dam failures.

Exploring various catastrophies that has happened in mankind's quest to conquer space, from the Apollo 1 tragedy to the Challenger and the Columbia disasters.

Witness the 10 worst sports crashes from the high-risk world of sport racing.

Trains, planes, and ships collide; exploring ten global collisions.

A CIA officer must trust an al-Qaida mole and fight to keep him alive.

Mariana investigates the explosive world of armored car heists.

Trains, planes, and ships collide; exploring ten global collisions.

A CIA officer must trust an al-Qaida mole and fight to keep him alive.

Mariana investigates the explosive world of armored car heists.

Every day our planet faces deadly threats; from earthquakes, viruses, tsunami's and extreme weather phenomenon, to threats from outer space in the form of radiation, asteroids and other space debris.

Ranking history's 10 most dramatic global disasters.

Ten of history's worst maritime disasters at sea.

Explore the 10 most dramatic structural collapses in history, from bridges to buildings.

A Mexican woman's relationship patterns are causing her headaches; a man arrives from Canada who is downright radiant.

Two French festival-goers may have to say au revoir to their travel plans; at the Port Huron border, routine questions reveal a traveler has a long criminal history; in San Francisco, a traveler with boring plans comes under heavy scrutiny.

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.

As winter tightens its icy grip, the small, isolated community of West Dawson finds itself completely cut off from emergency services. Alone, Ray faces a string of dangerous solo vehicle retrieval missions on a storm-battered highway.

The drivers are ready for what is forecast to be a cold and busy winter, but the tragic passing of legendary driver Darrell Ward leaves the drivers wondering who can take his place.

Nika's little brother gets in the way; Big Al is shut down; Ken and Guillaume's plan turns into a disaster; Karl and his crew go to a golf tournament.

A Mexican woman's relationship patterns are causing her headaches; a man arrives from Canada who is downright radiant.

Two French festival-goers may have to say au revoir to their travel plans; at the Port Huron border, routine questions reveal a traveler has a long criminal history; in San Francisco, a traveler with boring plans comes under heavy scrutiny.

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.

Alaskans confront brutal elements while on the hunt for critical resources.

Alaskans engineer inventive solutions for survival in the harsh elements.

With surprises around every bend, Alaskans must be ready for anything.

Alaskans brave the deadly cold of winter to protect their way of life.

The next generation must be resourceful tackling late winter challenges.

The next generation of Alaskans risk it all to ensure their survival.

Alaskans must push their boundaries in hopes of a prosperous future.