Mariana reveals the most intense and unexpected moments from Trafficked.

An inside look into "Trafficked" and the world's shadow economy.

Features HSI running multiple undercover drug deals; CBP discovers coke hidden in oatmeal.

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 investigates a scam that tricks seniors 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 meets the craftsmen who make and sell the world's finest counterfeit U.S. dollars.

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.

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

The Palace of Versailles in France reveals stories of a fallen musketeer, the schemes of Marie Antoinette, the murder of a king's mistress, and the origin of human life.

Breakdowns threaten the company's Christmas toy run to the Arctic; the ensuing chaos pushes a stressed-out Kelly past the breaking point.

The re-creation of a Bugatti proves to be a nightmare; a wrench is thrown into the delivery of a 1963 classic.

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.

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

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.

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.

Wildlife activists Benhail Antao and Louise Remedios must carefully remove a cobra from a building full of children.

Wildlife activists Benhail Antao and Louise Remedios try to deal with a snake that makes loud noises and rescue a leopard trapped in a well.

Si and Sioux help Shyam rescue a very elusive 'Houdini-snake'; Mbali goes solo with a black mamba in a courthouse, while Si and Sioux tackle a grumpy krait on the night-shift; Simon tails his first wild king cobra.

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

Wildlife activists Benhail Antao and Louise Remedios must carefully remove a cobra from a building full of children.

Wildlife activists Benhail Antao and Louise Remedios try to deal with a snake that makes loud noises and rescue a leopard trapped in a well.

Si and Sioux help Shyam rescue a very elusive 'Houdini-snake'; Mbali goes solo with a black mamba in a courthouse, while Si and Sioux tackle a grumpy krait on the night-shift; Simon tails his first wild king cobra.

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.

A faceoff develops over luxury counterfeits; agents detect potentially lethal powder; a CBP beagle finds the mother load of meat.

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

Stories from London's National Maritime Museum include the shooting of Admiral Horatio Nelson, the capture of pirates, Captain Bligh's commandeering of a lifeboat and lightning strikes at sea.

Ray must perform an emergency landing when the right landing gear of his Lockheed Electra becomes stuck in the up position.

Cartoon car called Mr. Beep rolls in on life support; Jay burns out on the Bugatti; exploding engines hinder Mustang deadline.

A faceoff develops over luxury counterfeits; agents detect potentially lethal powder; a CBP beagle finds the mother load of meat.

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

From a harrowing farrowing to broken bones, the PVS vets pull off miracles.

Donkeys, ducks and dogs, from quirky to jaw dropping.

PVS helps a laboring Lab, a big, wounded pig, and a kitten needing a home.

Santa takes a leap and Doc goes flying.

The vets swing into action mending paws, jaws, and a down on his luck duck.

Dr. Nicole tends to her old, beloved beagle, and it's all hands on deck for a litter of 11 puppies.

Clinic house cat, Tater, falls ill and the team bands together to save him.

An ice storm shuts down the clinic, and newborn labs are melting hearts.

The docs at Critter Fixer rush to aid a big tortoise with a cracked shell.

Cesar helps a pet parent whose three dogs battle to the point of bloodshed.

An ice storm shuts down the clinic, and newborn labs are melting hearts.

The docs at Critter Fixer rush to aid a big tortoise with a cracked shell.

Cesar helps a pet parent whose three dogs battle to the point of bloodshed.

From a harrowing farrowing to broken bones, the PVS vets pull off miracles.

Donkeys, ducks and dogs, from quirky to jaw dropping.

PVS helps a laboring Lab, a big, wounded pig, and a kitten needing a home.

Santa takes a leap and Doc goes flying.

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

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

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.

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

Festive gladiators, whispering camel herders and the water demands of ancient Romans are among the stories found in the National Bardo Museum in Tunis, Tunisia.

Cory works to ready a water bomber for prospective South Korean buyers, but a mechanical emergency puts his and Justin's lives in danger.

Paul has passport problems after David invites him to an elite-car auction in the United States; a 1959 Cadillac has more problems than expected.

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

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

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.

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

Gordon embraces local ingenuity as he fishes and forages through Cuba.

Gordon battles it out at Petra to impress Jordan's royal family.

Gordon dives into the culinary ocean of the Florida Keys.

Gordon dives, hunts, forages and forges on Hawaii's Big Island.

Gordon and his daughter Tilly explore centuries-old culinary traditions in Galicia, a largely overlooked but magnificent corner of Spain.

Gordon uncovers treasures of land and sea on Ireland's Connemara Coast.

Gordon explores England's southwest coast to find culinary gems in his own backyard.

A beaver smells something strange, chickens run on wet concrete, and a dog steals a pacifier.

Michelle faces off against the unforgiving Alaskan winter to help animals.

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

A beaver smells something strange, chickens run on wet concrete, and a dog steals a pacifier.

Michelle faces off against the unforgiving Alaskan winter to help animals.

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

Gordon embraces local ingenuity as he fishes and forages through Cuba.

Gordon battles it out at Petra to impress Jordan's royal family.

Gordon dives into the culinary ocean of the Florida Keys.

Gordon dives, hunts, forages and forges on Hawaii's Big Island.

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.

The African elephant is still acting out; a trumpeter swan bothers patrons; a tahr get his shots.

An overweight turtle; an Indian rhino can't take a hint; pinatas with the orangutans favorites.

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.

The African elephant is still acting out; a trumpeter swan bothers patrons; a tahr get his shots.

An overweight turtle; an Indian rhino can't take a hint; pinatas with the orangutans favorites.

Cesar rehabs an overexcited Australian shepherd and its emotional pet parent.

Cesar helps an aggressive beagle and a Malinois that refuse to leave home.

A pitbulls aggression is fueled by fear; a Frenchie eats everything.

Cesar helps a possessed pit mix and a miniature dachshund with a giant bark.

Cesar rehabilitates a German shepherd whose behavior is getting dangerous.

A couple with a baby seeks Cesar's help with a dog who bites and guards.

A Border Collie causes isolation and a Chihuahua bites the hand that feeds her.

Cesar rehabilitates a loud, anti-social Chihuahua and her inexperienced pet parents.

Cesar helps sequestered sisters and a woman preparing for surgery.

A Boston terrier fights with an Akita next door; two terriers hunt dogs.

Cesar rehabs an overexcited labrador and a pushy adolescent doberman.

Doctors from Pol Veterinary Services rush to help a distressed cow and her calf.

A young zebra undergoes urgent abdominal surgery after an encounter with an eland's horn; two meerkats jostle for top position in the meerkat mob.

Cesar rehabs an overexcited labrador and a pushy adolescent doberman.

Doctors from Pol Veterinary Services rush to help a distressed cow and her calf.

A young zebra undergoes urgent abdominal surgery after an encounter with an eland's horn; two meerkats jostle for top position in the meerkat mob.

Cesar rehabs an overexcited Australian shepherd and its emotional pet parent.

Cesar helps an aggressive beagle and a Malinois that refuse to leave home.

A pitbulls aggression is fueled by fear; a Frenchie eats everything.

Cesar helps a possessed pit mix and a miniature dachshund with a giant bark.

Reigning champ Polar Industries returns, and is looking to maintain its dominance by any means necessary; trucking rival Darrell Ward poaches an ice road legend out from the grips of Polar Industries.

A Siberian tiger gives birth prematurely; a blind bird goes for a stroll; a cheetah gets an exam.

The keepers have a half hour to move three cheetahs; Patsy finally obeys; Chao Nao the red panda.

Reigning champ Polar Industries returns, and is looking to maintain its dominance by any means necessary; trucking rival Darrell Ward poaches an ice road legend out from the grips of Polar Industries.

A Siberian tiger gives birth prematurely; a blind bird goes for a stroll; a cheetah gets an exam.

The keepers have a half hour to move three cheetahs; Patsy finally obeys; Chao Nao the red panda.

Wood bison are moved to the Calgary Zoo; the gorillas try out their new home; two polar bear cubs.

A female polar bear has a hysterectomy; a new lion exhibit; a red panda is trained.

Simon, Sioux and Mbali face a global snake crisis; as cities continue to grow and temperatures rise, thousands of snakes are on the move in a desperate search for food, water and shelter, which has led to a spike in snakebites.

In the height of black mamba season, the team splits up to deal with all the calls; Sioux and Mbali face a feisty black mamba while Simon wrestles an enormous specimen solo.

Simon and Sioux help rescue some of the world's deadliest snakes; a giant rat snake causes chaos at a kid's summer camp; a woman gets a surprise visit from a cobra in the toilet; the team come face to face with a King cobra for the first time.

Simon and Sioux join local snake catchers to capture and remove snakes sheltering people's homes and places of work; along the way, they face off with India's most dangerous snakes, including a giant King Cobra.

Snake Shyam needs help rescuing a deadly Russell's viper from a motorbike; a King cobra in search of a mate comes too close to the village and needs to be relocated; a spectacled cobra has to be dug out from a burrow in someone's back yard.

Si and Sioux help Shyam rescue a very elusive 'Houdini-snake'; Mbali goes solo with a black mamba in a courthouse, while Si and Sioux tackle a grumpy krait on the night-shift; Simon tails his first wild king cobra.

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

Finland's impressive defence in the Second World War and the nuclear age.

How Britain defended itself from invasion for nearly a thousand years.

The story of Poland's survival, against all the odds.

Three real world disasters dissected; in space, on a train, in a high-rise.

Features Albert Lin travelling to Peru, Oman, and Mexico in order to reveal ancient lost cities.

The story of Poland's survival, against all the odds.

Three real world disasters dissected; in space, on a train, in a high-rise.

Features Albert Lin travelling to Peru, Oman, and Mexico in order to reveal ancient lost cities.

In the height of black mamba season, the team splits up to deal with all the calls; Sioux and Mbali face a feisty black mamba while Simon wrestles an enormous specimen solo.

Simon and Sioux help rescue some of the world's deadliest snakes; a giant rat snake causes chaos at a kid's summer camp; a woman gets a surprise visit from a cobra in the toilet; the team come face to face with a King cobra for the first time.

Simon and Sioux join local snake catchers to capture and remove snakes sheltering people's homes and places of work; along the way, they face off with India's most dangerous snakes, including a giant King Cobra.

Snake Shyam needs help rescuing a deadly Russell's viper from a motorbike; a King cobra in search of a mate comes too close to the village and needs to be relocated; a spectacled cobra has to be dug out from a burrow in someone's back yard.

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.

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

Jay clashes with the new guy; a 1972 Plymouth Road Runner GTX arrives at the shop; a one-of-kind Swiss car goes up for auction.

A man is ready to liquidate his collection of dinosaur fossils and other quirky items; Scott hunts for maritime treasures while Sheldon eats oysters; a seasoned picker reveals his impressive man cave.

Justin and Cory attempt to place a Canadair CL-215 aircraft onto a cargo ship for delivery to a Korean company.

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.

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

HSI tracks shipment of 246kg of cocaine; CBP seizes illicit ammo and cash.

HSI Miami encounters mysterious new drug; CBP finds invasive snails in mail.

CBP uncovers smuggled human remains; Border Patrol stops migrant smugglers.

CBP Dulles finds outbound drugs; Border Patrol tracks human smugglers.

HSI finds cocaine hidden in frozen avocado paste; CBP recovers stolen cars.

CBP in McAllen faces a possible bomb; HSI arrests fentanyl traffickers.

A 48-hour sting leads HSI to a stash house; CBP finds drugs in gas tanks.

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

A terrifying tale of demonic possession in a witch trial in Ireland.

Killer wolves turn a quiet duck hunt deadly for Tim Curly Leach.

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

A terrifying tale of demonic possession in a witch trial in Ireland.

Killer wolves turn a quiet duck hunt deadly for Tim Curly Leach.

HSI tracks shipment of 246kg of cocaine; CBP seizes illicit ammo and cash.

HSI Miami encounters mysterious new drug; CBP finds invasive snails in mail.

CBP uncovers smuggled human remains; Border Patrol stops migrant smugglers.

CBP Dulles finds outbound drugs; Border Patrol tracks human smugglers.

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.

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

Guild owner David orders rivals Jay and Dave to join forces on a vehicle from a horror film; Paul risks his son's education fund on two cars.

In Nova Scotia, Scott pays top dollar for a mechanical rooster; two treasures are found inside a decrepit storage barn; a lobster fisherman's vast collection contains the contents of an old country store.

Tempers flare as Corey and Justin attempt to remove their plane from the ship and deliver it to its final destination in South Korea; Mikey takes part in a grueling endurance race.

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.

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

Mariana investigates the illicit trade in human organs.

Mariana goes in search of the elusive chemists who make the world's LSD.

Mariana exposes the dangers of the growing and deadly ghost guns industry.

Mariana investigates the lucrative black market for private data.

Enhanced: Mariana follows the booming MDMA supply chain.

Mariana journeys into gangland to understand the violence plaguing LA.

Mariana investigates how illicit oil is fueling terrorist groups worldwide.

Mariana embeds with crypto scammers who show her how they make millions.

Mariana shines light on a new breed of cocaine trafficker: lady bosses.

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

Mariana embeds with crypto scammers who show her how they make millions.

Mariana shines light on a new breed of cocaine trafficker: lady bosses.

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

Mariana investigates the illicit trade in human organs.

Mariana goes in search of the elusive chemists who make the world's LSD.

Mariana exposes the dangers of the growing and deadly ghost guns industry.

Mariana investigates the lucrative black market for private data.

A faceoff develops over luxury counterfeits; agents detect potentially lethal powder; a CBP beagle finds the mother load of meat.

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.

Ian becomes upset when he is removed from working on a 1970 Datsun 510; the multimillion-dollar Bugatti Aerolithe is damaged.

Scott and Sheldon make a huge offer to buy the entire contents of a prolific collector's man cave; hidden gems are unearthed among the clutter of a now-defunct nautical museum.

Brian is brought in to finish a dangerous job; former Buffalo Airways pilot Arnie Schreder is remembered.

A faceoff develops over luxury counterfeits; agents detect potentially lethal powder; a CBP beagle finds the mother load of meat.

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.

In the shadow of the Great Pyramid, archaeologists unearth a royal palace.

Archeologists excavate an unexplored burial chamber inside a pyramid.

Archaeologists explore life and death in Ancient Egypt's metropolis, Alexandria.

Archaeologists explore hidden tombs and find spectacular mummies.

Archaeologists unearth new clues about a forgotten dynasty, the Sun Kings.

Archaeologists investigate Egypt's last legendary Queen, Cleopatra.

Archaeologists investigate the mysterious mega tombs of a forgotten era.

Experts investigate a forgotten valley hiding a hoard of royal mummies.

Archaeologists investigate the battle strategies of Ramses the Second, Egypt's warrior pharaoh.

Archaeologists uncover the secrets of Tutankhamun's religious reforms.

Experts investigate a forgotten valley hiding a hoard of royal mummies.

Archaeologists investigate the battle strategies of Ramses the Second, Egypt's warrior pharaoh.

Archaeologists uncover the secrets of Tutankhamun's religious reforms.

In the shadow of the Great Pyramid, archaeologists unearth a royal palace.

Archeologists excavate an unexplored burial chamber inside a pyramid.

Archaeologists explore life and death in Ancient Egypt's metropolis, Alexandria.

Archaeologists explore hidden tombs and find spectacular mummies.

A CBP canine tracks a THC-toting traveler.

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.

Alex's ego is crushed when the Bugatti fails to perform; a damaged Alfa Romeo gets a cosmetic overhaul; David attempts to figure out what is wrong with Larry's new Ferrari.

Scott and Sheldon travel to the United Kingdom to purchase a Wild West collection with a Canadian twist; one of the world's largest collections of nautical salvage is displayed at the Trinity Marine warehouse.

Justin and Cory's flight to Turkey involves a pit stop at a dangerous airstrip in Greenland; Mikey visits LEGOLAND in Denmark for an event involving Buffalo Airways.

A CBP canine tracks a THC-toting traveler.

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.

These tall, bark and handsome canines have a date with Dr. Michelle Oakley.

Dr. Michelle Oakley is knee-deep in snow and animal emergencies.

Dr. Oakley treats a cat that swallowed a string and a pregnant reindeer with cancer.

Dr. Oakley faces a toxic emergency and removes the eye of an alpaca.

A look into how the T-Rex became king of the dinosaurs.

A look into how prehistoric land mammals evolved into top ocean predators.

How the giant ice age mammoth became extinct.

Taking a look at the excavations in the La Brea Tar Pits in Los Angeles and showcasing how the pits can help unravel the mystery of how the saber-toothed tiger hunted its prey.

How the giant megalodon shark took over the oceans.

How the Tasmanian Tiger became extinct.

Taking a look at the excavations in the La Brea Tar Pits in Los Angeles and showcasing how the pits can help unravel the mystery of how the saber-toothed tiger hunted its prey.

How the giant megalodon shark took over the oceans.

How the Tasmanian Tiger became extinct.

These tall, bark and handsome canines have a date with Dr. Michelle Oakley.

Dr. Michelle Oakley is knee-deep in snow and animal emergencies.

Dr. Oakley treats a cat that swallowed a string and a pregnant reindeer with cancer.

Dr. Oakley faces a toxic emergency and removes the eye of an alpaca.

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.

Customs and immigration officials work to protect their borders.

Customs and immigration officials work to protect their borders.

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.

David takes Alex to the Elegance at Hershey; the guys work on a 1966 Oldsmobile Toronado and race to complete the Bugatti.

The Pickers meet a World War II collector who is reluctant to sell; a fellow picker reveals his first-class collection; the guys scour an attic for treasure during their visit to the Welsh village of Portmeirion.

Joe and Mikey recover a lost tailpiece from a plane wreck; Cory and Justin battle severe icing conditions over the North Atlantic.

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.

Customs and immigration officials work to protect their borders.

Customs and immigration officials work to protect their borders.

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.

Bear shows Simu Liu how to trigger avalanches, plunge into frozen lakes and traverse alpine terrain as temperatures drop below -20 degrees.

Ashton Kutcher joins Bear to challenge the coastal jungles of Costa Rica. Their adventure begins with a helicopter jump into the Pacific Ocean.

Rappelling from a helicopter, Bear takes Florence Pugh to the volcanic rainforests of Costa Rica.

Anthony Anderson joins Bear in the Sierra Nevada mountains.

Bear puts Rob Riggle through survival tests in the Great Basin to prepare for Rob's latest movie role.

Actor Troy Kotsur braves rapids and cliffs in the Scottish Highlands.