Wildlife activists Benhail Antao and Louise Remedios race across Goa to rescue a juvenile cobra and two combating rat snakes.

A critically endangered antelope is losing weight fast and needs urgent surgery; a baby rhino takes her first steps out on the savannah.

Only the most adaptable bugs can thrive in an ever-changing Texan backyard.

In the African savanna, two heroic bugs face mammoth challenges in a land of giants.

Wildlife activists Benhail Antao and Louise Remedios race across Goa to rescue a juvenile cobra and two combating rat snakes.

Cesar helps a rottweiler on house arrest and a Pom Terrier to socialize.

A cattle dog protects her fearful owner, and a family finds a perfect pal.

Cesar rehabs a boxer with an aggressive obsession with attacking handbags.

Cesar finds a match for a young couple and helps with separation anxiety.

Officers get the dope on a traveler's rap sheet; A passenger is unsure of his luggage contents.

Suspicious x-rays; an MMA fighter's story; an RV search that reveals unusual weapons; a cross-border car sale.

A businesswoman's personal items sound alarms; a cargo ship crew member who has been concealing in the ceiling; a puppeteer couple; an American seeking legal advice in Ontario.

Partygoers receive rave reviews at the Coutts crossing; officers delve into an international affair.

Darrell and Todd try to get through record breaking snowfall, while the rest of the team fights to survive; despite frigid temperatures the war between VP Express and Polar reaches a boiling point.

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

The Pickers visit Armstrong, Abbotsford and Mission in British Columbia as they compete to see who can obtain the most manly item; trolley ads, tin litho signs and rare gas pumps are among the unique finds.

Officers get the dope on a traveler's rap sheet; A passenger is unsure of his luggage contents.

Suspicious x-rays; an MMA fighter's story; an RV search that reveals unusual weapons; a cross-border car sale.

A businesswoman's personal items sound alarms; a cargo ship crew member who has been concealing in the ceiling; a puppeteer couple; an American seeking legal advice in Ontario.

Partygoers receive rave reviews at the Coutts crossing; officers delve into an international affair.

Archaeologists search for the truth behind the Curse of Tutankhamun.

Experts are the first to venture inside the heart of an unexplored pyramid.

New discoveries reveal the secrets of Roman gladiators' enduring appeal.

Archaeologists dig in Pompeii to uncover the dark side of the idyllic Roman city by finding the room of an enslaved person.

Archaeologists reveal the discovery of a Nero megastructure.

Discoveries uncover how the Romans ruled the seas for four centuries.

Archaeologists excavate a buried city in Jordan, dive a sunken temple in Italy and explore Petra to shed new light on how Rome conquered the east.

Archaeologists excavate the vast frontier of the Roman Empire, investigating the battle to keep it safe.

A robot chess player, an immortality device and a lost language, wrapped mummy?

Jeff inspects LEGOs, microorganisms, and miniatures.

Paul leaves Yunnan and moves to neighboring Sichuan province with his hiking friends.

Archaeologists excavate the vast frontier of the Roman Empire, investigating the battle to keep it safe.

A robot chess player, an immortality device and a lost language, wrapped mummy?

Jeff inspects LEGOs, microorganisms, and miniatures.

Paul leaves Yunnan and moves to neighboring Sichuan province with his hiking friends.

Archaeologists search for the truth behind the Curse of Tutankhamun.

Experts are the first to venture inside the heart of an unexplored pyramid.

New discoveries reveal the secrets of Roman gladiators' enduring appeal.

Archaeologists dig in Pompeii to uncover the dark side of the idyllic Roman city by finding the room of an enslaved person.

The truckers battle a massive storm.

Hugh has a plan to crush the competition; Todd and Lisa are pressured to up their game.

The truckers battle a massive storm.

Hugh has a plan to crush the competition; Todd and Lisa are pressured to up their game.

Cesar helps a back-of-the-pack biter and his pet parent shed their fear.

Cesar rehabs an overexcited labrador and a pushy adolescent doberman.

Fueled by fear, two brothers turn against each other in deadly attacks.

Cesar rehabs an aggressive Labradoodle with an alarming history of biting.

Cesar rehabs an over-policing pit mix and a space-invading mini schnauzer.

Cesar helps shed the pounds of an overweight pit mix.

Cesar matches a rescue dog with a family & inspires them to be leaders.

Paraplegic pet mom struggles to manage fighting bulldogs on her own.

Cesar rehabs two destructive Boston terriers and a senior husky that is taking a big social step.

Cesar helps an excited pit bull and matches a family with their forever dog.

Cesar works with a confused Goldendoodle and a fearful pet parent.

Cesar's rehab of two violent dogs threatening to kill each other continues.

Cesar finds a perfect dog for a single mom and helps a biting mini pinscher.

Cesar works with a confused Goldendoodle and a fearful pet parent.

Cesar's rehab of two violent dogs threatening to kill each other continues.

Cesar finds a perfect dog for a single mom and helps a biting mini pinscher.

Cesar rehabs an over-policing pit mix and a space-invading mini schnauzer.

Cesar helps shed the pounds of an overweight pit mix.

Cesar matches a rescue dog with a family & inspires them to be leaders.

With temperatures on the rise, conditions on the ice roads result in meltdown. The truckers from Polar and VP Express are pushed to the limit, crossing thin ice on their way to deliver critical loads.

Lisa and Todd take on one of the toughest runs of the season; Darrell steals business from his former boss; Alex's trucking season is threatened by a crash.

With temperatures on the rise, conditions on the ice roads result in meltdown. The truckers from Polar and VP Express are pushed to the limit, crossing thin ice on their way to deliver critical loads.

Lisa and Todd take on one of the toughest runs of the season; Darrell steals business from his former boss; Alex's trucking season is threatened by a crash.

Searching for impressive finds in Winnipeg; Scott involves his two sons in the action.

In 1944, the Allied invasion of Nazi-occupied Europe brings the hope of freedom and the devastation of war to the people of France.

New colorized footage and testimony reveal the cost paid by the Allies and civilians to free Belgium and the Netherlands from Nazi occupation.

In late 1944, Hitler forces the Americans into their biggest battle of the war when he launches a surprise attack into liberated Belgium.

New colorized footage and testimony reveals the cost of victory, the aftermath of war and the liberation of the camps and the destruction of Germany.

Force K6, an Indian regiment of mule handlers in WW2, aided Allied evacuation at Dunkirk, other units escaped Nazi-occupied France.

The stories of three Black sailors, who not only miraculously survived the attack on Pearl Harbor, but also saved countless lives.

Unearthing the hidden heroes of the 320th Barrage Balloon Battalion, the only all-Black combat unit to fight on the D-Day beaches to help liberate Europe.

The Black Panthers, an elite tank unit, push back Hitler's final advance.

The ingenious fortress designs used to defend France.

Spain's impressive fortifications in a dramatic history of conflict.

Explore the engineering wonders of Europe's lands of ice and fire.

The train station is severely tested during the Formula 1 Grand Prix.

Spain's impressive fortifications in a dramatic history of conflict.

Explore the engineering wonders of Europe's lands of ice and fire.

The train station is severely tested during the Formula 1 Grand Prix.

In late 1944, Hitler forces the Americans into their biggest battle of the war when he launches a surprise attack into liberated Belgium.

New colorized footage and testimony reveals the cost of victory, the aftermath of war and the liberation of the camps and the destruction of Germany.

Force K6, an Indian regiment of mule handlers in WW2, aided Allied evacuation at Dunkirk, other units escaped Nazi-occupied France.

The stories of three Black sailors, who not only miraculously survived the attack on Pearl Harbor, but also saved countless lives.

Cookies can be more trouble than treat; twins with matching beers take a wrong turn.

Officers make a stunning discovery; a tourist's papers hint at her true plans for coming to Canada.

A senior has some unfriendly gear in his RV; a Canadian returning from Panama tells all.

An American is busted trying to catch a different kind of trip; officers help a tipsy traveler.

The source of Slumach's lost gold.

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.

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

Cookies can be more trouble than treat; twins with matching beers take a wrong turn.

Officers make a stunning discovery; a tourist's papers hint at her true plans for coming to Canada.

A senior has some unfriendly gear in his RV; a Canadian returning from Panama tells all.

An American is busted trying to catch a different kind of trip; officers help a tipsy traveler.

HSI tails vehicle transporting meth; CBP seizes looted Ukrainian relics.

Rookie CBP officers find multiple drugs; HSI runs a buy-bust operation.

Border Patrol chases suspect fleeing arrest; CBP stops weed leaving the U.S.

HSI finds overcrowded human stash houses; CBP discovers meth in machinery.

HSI busts meth smugglers in San Diego; CBP intercepts drug body carriers.

AMO Puerto Rico finds cocaine on a ferry; CBP stops travelers with opioids.

HSI finds illegal guns in Miami; CBP in Texas seizes meth worth millions.

Curly Leach spends some final moments with a very dear old friend, leaving Port Protection for an easier life back on the grid.

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

Sam's desire to silence his generators ignites a fire that threatens to burn his house to the ground.

Curly Leach spends some final moments with a very dear old friend, leaving Port Protection for an easier life back on the grid.

In this enhanced episode, HSI busts date-rape-drug traffickers.

Sam's desire to silence his generators ignites a fire that threatens to burn his house to the ground.

HSI tails vehicle transporting meth; CBP seizes looted Ukrainian relics.

Rookie CBP officers find multiple drugs; HSI runs a buy-bust operation.

Border Patrol chases suspect fleeing arrest; CBP stops weed leaving the U.S.

HSI finds overcrowded human stash houses; CBP discovers meth in machinery.

A heavy automobile container hints at trouble; A student's stash of food brings him discomfort.

A traveler returns with a surprise; Marine officers come upon an infested container.

A student is failing his customs exam; officers prevent an artifact from going down in history.

The canine unit brings home the bacon; A traveler discovers she's got a friend in high places.

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

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 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 heavy automobile container hints at trouble; A student's stash of food brings him discomfort.

A traveler returns with a surprise; Marine officers come upon an infested container.

A student is failing his customs exam; officers prevent an artifact from going down in history.

The canine unit brings home the bacon; A traveler discovers she's got a friend in high places.

In this enhanced episode, the causes of three disasters are dissected.

Three real-world disasters forensically dissected - Deepwater Horizon explosion, the Concorde crash and the funicular fire at Kaprun.

The causes of three disasters involving a high-rise, a submarine and a subway station are dissected.

In this enhanced episode, the causes of three disasters are dissected, a nuclear plant, a tunnel and a department store.

Enhanced; three real-world disasters dissected: in space, a train and a high-rise.

Enhanced; three real-world disasters dissected: nuclear missile, ferry and oil rig.

In this enhanced episode, the causes of three disasters are dissected; Lac-Mégantic train crash, Imperial Sugar refinery explosion and Ever Given container ship accident.

Three real-world disasters forensically dissected: Fukushima nuclear plant, a Manhattan crane collapse, fire on the aircraft carrier USS Forrestal.

Emergency services evacuate passengers from a stranded train without power.

Health care costs have pushed millions of Americans to the black market.

Three real-world disasters forensically dissected: Fukushima nuclear plant, a Manhattan crane collapse, fire on the aircraft carrier USS Forrestal.

Emergency services evacuate passengers from a stranded train without power.

Health care costs have pushed millions of Americans to the black market.

In this enhanced episode, the causes of three disasters are dissected.

Three real-world disasters forensically dissected - Deepwater Horizon explosion, the Concorde crash and the funicular fire at Kaprun.

The causes of three disasters involving a high-rise, a submarine and a subway station are dissected.

In this enhanced episode, the causes of three disasters are dissected, a nuclear plant, a tunnel and a department store.

Strange beetles and butterflies are mailed into Canada that may carry disease.

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

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.

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.

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.

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.

Strange beetles and butterflies are mailed into Canada that may carry disease.

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

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.

Individuals who have recently left their traditional lifestyle behind face a challenging new world off the grid in the wilds of Alaska.

Individuals who have recently left their traditional lifestyle behind face a challenging new world off the grid in the wilds of Alaska.

The next generation is tireless in the hunt to secure Alaska's resources.

Alaska provides, but the next generation must be able to reap its rewards.

Alaskans must master trapping, fishing, construction and mechanical repair in order to survive.

Alaskans work hard to prepare for winter's brutally harsh elements.

Alaska's next generation must respect the land and its inhabitants to survive.

The next generation of remote Alaskans must secure food in bleak winter.

Airport workers attempt to locate a cat who escaped from its carrier on the tarmac; Alabama's unclaimed baggage store finds a Fendi runway dress.

Thord is busy rescuing two crashed trucks, so when he gets a call about a group of teenagers who've skidded off the road, he sends his daughter Malin.

The next generation of remote Alaskans must secure food in bleak winter.

Airport workers attempt to locate a cat who escaped from its carrier on the tarmac; Alabama's unclaimed baggage store finds a Fendi runway dress.

Thord is busy rescuing two crashed trucks, so when he gets a call about a group of teenagers who've skidded off the road, he sends his daughter Malin.

Individuals who have recently left their traditional lifestyle behind face a challenging new world off the grid in the wilds of Alaska.

Individuals who have recently left their traditional lifestyle behind face a challenging new world off the grid in the wilds of Alaska.

The next generation is tireless in the hunt to secure Alaska's resources.

Alaska provides, but the next generation must be able to reap its rewards.

A woman returning from a trip to China has business cards to a Sydney brothel and passports for three Chinese girls.

A piece of salmon comes up positive for cocaine; Syrian carpets have something suspicious woven into the fabric.

A man arrives from Beijing with strong readings for narcotics; three men want to visit a temple that hasn't been built yet.

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

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

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.

A woman returning from a trip to China has business cards to a Sydney brothel and passports for three Chinese girls.

A piece of salmon comes up positive for cocaine; Syrian carpets have something suspicious woven into the fabric.

A man arrives from Beijing with strong readings for narcotics; three men want to visit a temple that hasn't been built yet.

Dr. Pol and his team handle animal emergencies in Central Michigan.

A cow requires the doctor's assistance.

Dr. Pol needs to take blood samples from a flock of sheep to test for Ovine Progressive Pneumonia, a progressive, incurable and highly contagious disease.

Dr. Pol examines a goat that has been refusing to eat.

Dr. Pol and Diane celebrate a milestone that's been decades in the making.

Dr. Pol celebrates turning 80 with a trip to the Netherlands with Diane.

The Pols welcome a fluffy addition to the family; Tater is not pleased.

Giraffes stop traffic, a lemur has a birthday and a hippo makes friends.

On a British farm, busy bugs join the farmer to lend a hand - or six!

For bugs in the forest, finding love is an epic quest.

Wildlife activists Benhail Antao and Louise Remedios race against time to rescue a saw-scaled viper, one of the deadliest venomous snakes in India.

Giraffes stop traffic, a lemur has a birthday and a hippo makes friends.

On a British farm, busy bugs join the farmer to lend a hand - or six!

For bugs in the forest, finding love is an epic quest.

Wildlife activists Benhail Antao and Louise Remedios race against time to rescue a saw-scaled viper, one of the deadliest venomous snakes in India.

Dr. Pol and his team handle animal emergencies in Central Michigan.

A cow requires the doctor's assistance.

Dr. Pol needs to take blood samples from a flock of sheep to test for Ovine Progressive Pneumonia, a progressive, incurable and highly contagious disease.

Dr. Pol examines a goat that has been refusing to eat.

A woman's belongings are positive for heroin; a Malaysian man arrives looking for work.

A woman with protruding pants attracts the attention of Customs; a passenger would rather go to court than pay a fine.

A woman tries to smuggle an expensive gift into Australia; a package from Hong Kong looks suspicious.

A fidgety passenger has officers on high alert because of what's found under his home's floorboards.

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

Harsh flying conditions threaten the search for a historic missing plane.

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

A woman's belongings are positive for heroin; a Malaysian man arrives looking for work.

A woman with protruding pants attracts the attention of Customs; a passenger would rather go to court than pay a fine.

A woman tries to smuggle an expensive gift into Australia; a package from Hong Kong looks suspicious.

A fidgety passenger has officers on high alert because of what's found under his home's floorboards.

Just weeks before the war ends, USS Indianapolis is violently sunk; hundreds of men are lost at sea as they fight off exposure and shark attacks; it is the worst disaster at sea in U.S. Naval history.

Undersea explorers aboard the research vessel Petrel detect a wreck off the coast of the Philippines that fits the profile of an American destroyer.

Hours after emerging victorious in the first carrier-to-carrier battle of World War II, the USS Lexington erupts in flames due to enemy fire; after 80 years, Petrel hopes to spot the wreck and the planes that went down with the ship.

The Petrel team searches for the American aircraft carrier USS Hornet; the ship's life is cut short when the Hornet sails into a hornet's nest of Japanese ships.

What happened aboard the USS Juneau; five brothers are lost, but not all perish when the ship goes down; at least one brother is among scores of men stranded at sea for eight days.

In one night, over 1000 Allied sailors perish when four cruisers go down in flames; Petrel searches for the cruisers in a graveyard littered with ships.

Rob Kraft hunts for Musashi, the biggest battleship ever built and considered to be unsinkable by the Japanese.

Research vessel Petrel picks up what they believe to be the debris trail of the USS Johnston; a manned submersible is deployed to potentially put eyes on the deepest shipwreck in the world.

Can a carving retell history? A helmet cure modernity? Who's the armor skeleton?

Jeff visits with people who consistently challenge biker stereotypes.

National Geographic explorer and writer Paul Salopek walks the Tea Horse Road, a southerly branch of the vast ancient silk road network in China, delving into its rich history and culture through the lens of a village historian.

Research vessel Petrel picks up what they believe to be the debris trail of the USS Johnston; a manned submersible is deployed to potentially put eyes on the deepest shipwreck in the world.

Can a carving retell history? A helmet cure modernity? Who's the armor skeleton?

Jeff visits with people who consistently challenge biker stereotypes.

National Geographic explorer and writer Paul Salopek walks the Tea Horse Road, a southerly branch of the vast ancient silk road network in China, delving into its rich history and culture through the lens of a village historian.

Just weeks before the war ends, USS Indianapolis is violently sunk; hundreds of men are lost at sea as they fight off exposure and shark attacks; it is the worst disaster at sea in U.S. Naval history.

Undersea explorers aboard the research vessel Petrel detect a wreck off the coast of the Philippines that fits the profile of an American destroyer.

Hours after emerging victorious in the first carrier-to-carrier battle of World War II, the USS Lexington erupts in flames due to enemy fire; after 80 years, Petrel hopes to spot the wreck and the planes that went down with the ship.

The Petrel team searches for the American aircraft carrier USS Hornet; the ship's life is cut short when the Hornet sails into a hornet's nest of Japanese ships.

Darrell's calls in a surprising reinforcement; but can this new team member hack the treacherous ice roads; Hugh has a brush with near disaster.

The final words of a lifelong gold hunter send Adam, Kru and Daryl Friesen through an icy gauntlet high above Pitt Lake.

Darrell's calls in a surprising reinforcement; but can this new team member hack the treacherous ice roads; Hugh has a brush with near disaster.

The final words of a lifelong gold hunter send Adam, Kru and Daryl Friesen through an icy gauntlet high above Pitt Lake.

The staff treats a sushi eating-squirrel monkey, a cockatiel and a pregnant rabbit.

Dr. T's bunny suffers a life-threatening illness and is taken into emergency surgery.

The vet staff is shocked when a client brings in a baby snake with two heads.

The doctors have their hands full with emergency cases involving a tortoise and a goose.

The doctors solve a pigeon's mystery mass and find a foreign object inside a ferret.

Dr. K must act quick and perform emergency surgery on a tortoise crushed by a car.

A binge-eating pig learns that what goes down, must come up; a toothache sends Dr. T down a rabbit hole; a stubborn egg sends a sick chick to the hospital.

A macaw with a mysterious mass has Dr. K going beyond the call of duty; Dr. T gets a visit from a tiny tortoise who lost a fight with a pit bull puppy.

It's a wild few days as Dr. K and company try to keep control of crazy critters.

Dr. K wrestles a pot-bellied pig and handles an aggressive squirrel over a challenging few days at the hospital.

Dr. K and the team host a gender reveal party for a tortoise.

A guinea pig may need to have its foot amputated; Dr. K performs emergency surgery on a baby bird that can't breathe.

A snapping turtle case stumps Dr. K; a hedgehog gives Dr. T the silent treatment; a feisty pygmy goat stirs up some mischief.

Dr. K and the team host a gender reveal party for a tortoise.

A guinea pig may need to have its foot amputated; Dr. K performs emergency surgery on a baby bird that can't breathe.

A snapping turtle case stumps Dr. K; a hedgehog gives Dr. T the silent treatment; a feisty pygmy goat stirs up some mischief.

The doctors have their hands full with emergency cases involving a tortoise and a goose.

The doctors solve a pigeon's mystery mass and find a foreign object inside a ferret.

Dr. K must act quick and perform emergency surgery on a tortoise crushed by a car.

A binge-eating pig learns that what goes down, must come up; a toothache sends Dr. T down a rabbit hole; a stubborn egg sends a sick chick to the hospital.

Darrell continues to teach Reno how to drive the ice roads; bad wiring could sink Alex's cement load; Lisa and Todd run into a a road block.

An old map connected to testimony from an 1891 eyewitness account of Slumach's hanging sheds light on the legend.

Darrell continues to teach Reno how to drive the ice roads; bad wiring could sink Alex's cement load; Lisa and Todd run into a a road block.

An old map connected to testimony from an 1891 eyewitness account of Slumach's hanging sheds light on the legend.

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

Interviews and rare footage document the 1915 Turkish slaughter of Armenians.

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.