Archaeologists exploring the origins of the civilisation that built the great city of Angkor investigate ancient lost treasure discovered in Laos.

The discovery of gold and silver artifacts in Laos, dating to the early days of the Khmer Empire, leads scientists to investigate how the objects were made; on their journey, they retrace the steps of the ancient kings.

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

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

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.

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

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.

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

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

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

Cesar rehabs an overprotective Belgian Malinois and a puppy with no leadership.

A pet parent unknowingly trains his pit bull to attack cleaning objects.

Cesar rehabs a sound sensitive sheepdog and a confused golden retriever.

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

Two dogs with bizarre obsessions.

Cesar helps three little dogs with big problems.

In this special episode, Cesar helps two dogs with aggression issues.

In this special episode, Cesar helps two dogs in life-or-death situations.

In this special episode, Cesar helps three pandemic pups with big problems.

Cesar helps two families with big problems.

Cesar helps three families with quirky pups.

In this special episode, Cesar helps three pandemic pups with big problems.

Cesar helps two families with big problems.

Cesar helps three families with quirky pups.

A pet parent unknowingly trains his pit bull to attack cleaning objects.

Cesar rehabs a sound sensitive sheepdog and a confused golden retriever.

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

Two dogs with bizarre obsessions.

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.

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

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.

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

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.

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.

The most-famous witch trials of them all: Salem, Massachusetts.

The brutal Trier witch trials and the origins of witch-hunting.

The true story of the first major witch trials in Scotland.

Witch-hunters torture so-called witches during England's Civil War.

Swedish children tell stories of a place witches took them to.

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

As Chris bulks up for "Thor: Love and Thunder," he needs to build a body that looks right for an immortal god. But, he also wants the kind of muscles that are scientifically proven to ensure he stays strong and healthy in real life.

Chris goes to South Korea for the tools to change his relationship to pain.

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

As Chris bulks up for "Thor: Love and Thunder," he needs to build a body that looks right for an immortal god. But, he also wants the kind of muscles that are scientifically proven to ensure he stays strong and healthy in real life.

Chris goes to South Korea for the tools to change his relationship to pain.

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.

The most-famous witch trials of them all: Salem, Massachusetts.

The brutal Trier witch trials and the origins of witch-hunting.

Authorities find a traveler's pot pipe in Blaine; in Port Huron, a traveler's past may come back to haunt him.

A Canadian must deliver the truth before visiting his wife and child; an officer finds a skull at the JFK mail facility.

A Ukrainian traveler may split after divorcing her husband; a suspicious package is sent to the lab for narcotics testing.

A Canadian is interviewed after officers find pictures of pot plants on his phone; a canine team detects marijuana on a couple.

Karl contemplates a crew member's dismissal; fire threatens Cam's camp; Ken pours money into his operation.

A bell possibly from the train crash that killed Jumbo the Elephant in the late 1800s.

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.

Authorities find a traveler's pot pipe in Blaine; in Port Huron, a traveler's past may come back to haunt him.

A Canadian must deliver the truth before visiting his wife and child; an officer finds a skull at the JFK mail facility.

A Ukrainian traveler may split after divorcing her husband; a suspicious package is sent to the lab for narcotics testing.

A Canadian is interviewed after officers find pictures of pot plants on his phone; a canine team detects marijuana on a couple.

A long winter forever changes the paths of Port Protection's residents.

Carl hunts a deer; Troy dives and Curly and Veronica embrace danger.

In Port Protection, tools aren't always used for what they're intended.

Curly helps battle a group of deadly trees on his neighbor's property.

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

Sam and Squibb attempt to salvage an unwieldy boat mast.

Hoping to add a new weapon to his fishing arsenal, Oliver hits the water with Carl, Matt and a new set of slinky pots, and they're in for a shock.

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

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

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

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

In this enhanced episode, CBP finds meth in a shipment of chili peppers.

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

A long winter forever changes the paths of Port Protection's residents.

Carl hunts a deer; Troy dives and Curly and Veronica embrace danger.

In Port Protection, tools aren't always used for what they're intended.

Curly helps battle a group of deadly trees on his neighbor's property.

A conductor arrives to lead a symphony orchestra; a drug dealer tries to enter the United States.

CBP worries a man from Nicaragua may not leave the U.S.; a traveler's plan to start an e-vape business may go up in smoke.

A traveler must make a difficult decision; a bus passenger is busted with bud in her bag.

Officers find cocaine inside a Caribbean cocktail; officers sift through packages of pills.

Ken loses a machine when he can't afford to pay his debts and his crew; Big Al experiences more mechanical breakdowns; Dennis needs to quickly discover $10,000 worth of gold or get shut down.

The guys get a sneak peek of an auction with antique cars, retro gas pumps and collectibles.

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.

A conductor arrives to lead a symphony orchestra; a drug dealer tries to enter the United States.

CBP worries a man from Nicaragua may not leave the U.S.; a traveler's plan to start an e-vape business may go up in smoke.

A traveler must make a difficult decision; a bus passenger is busted with bud in her bag.

Officers find cocaine inside a Caribbean cocktail; officers sift through packages of pills.

Lion Air Flight 610 was just 13 minutes into flight from Jakarta, Indonesia, when it plunges into the sea on October 29, 2018.

The 1985 Japan Airlines Boeing 747 crash is the deadliest single-aircraft accident in history, with 520 fatalities out of 524 people on board.

Curious minds discover how the British Midland Flight 92 crashes on a freeway embankment near the village of Kegworth, resulting in tragedy.

Pakistan International Airlines Flight 8303 crashes near Karachi on 22 May 2020, minutes from landing. The Airbus A320 collides with a residential area during a second approach, just miles from the runway.

Experts shed light on the United Airlines Flight 232 crash as survivors share their firsthand accounts.

US Airways Flight 1549 takes off from New York City's LaGuardia Airport when it collides with a flock of birds, destroying both engines.

Investigators examine the reason behind the deadly crash of Air France Flight 447 that took a catastrophic dive into the Atlantic Ocean.

Survivors of the 2009 Turkish Airlines Flight 1951 crash share their firsthand experiences from that fateful day.

Will heads to the North Pole for his final and most dangerous mission.

Activist Dima Litvinov is on a dangerous mission; he documents the effects of the Russian military actions at the Chernobyl nuclear power plant and detects radiation levels.

A unique look into the mission and inner workings of Greenpeace through its legal campaigns, top-level scientific work and lobbying, and follows the work of activists and campaigners in their mission to save the planet.

Will heads to the North Pole for his final and most dangerous mission.

Survivors of the 2009 Turkish Airlines Flight 1951 crash share their firsthand experiences from that fateful day.

Lion Air Flight 610 was just 13 minutes into flight from Jakarta, Indonesia, when it plunges into the sea on October 29, 2018.

The 1985 Japan Airlines Boeing 747 crash is the deadliest single-aircraft accident in history, with 520 fatalities out of 524 people on board.

Curious minds discover how the British Midland Flight 92 crashes on a freeway embankment near the village of Kegworth, resulting in tragedy.

Pakistan International Airlines Flight 8303 crashes near Karachi on 22 May 2020, minutes from landing. The Airbus A320 collides with a residential area during a second approach, just miles from the runway.

Real estate entrepreneurs are questioned; a traveler's investments in the U.S. raises alarms; suspicious Mexican souvenirs.

A traveler is caught driving without a license; a U.S. resident returns from the Dominican Republic.

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.

Ken contends with a double mutiny; Cam's injured employee is airlifted to a hospital; Karl's crew encounters a bear.

A showroom full of antique cars, jukeboxes and tin trucks in central Alberta.

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.

Real estate entrepreneurs are questioned; a traveler's investments in the U.S. raises alarms; suspicious Mexican souvenirs.

A traveler is caught driving without a license; a U.S. resident returns from the Dominican Republic.

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.

Thord and Bjoern take on a marathon, 16-hour rescue, to stop an unstable truck falling off a steep gradient with a large lake below; it involves the men putting themselves in danger.

In the south of Norway, Thord, Bjoern and their army of men are forced to go out into one of the country's worst storms in ten years; they need to rescue a truck loaded with steel girders.

Bjoern is under pressure when a head-on collision between two trucks blocks an ambulance on an emergency call-out; Thord works through the night to rescue a driver trapped in his jack-knifed truck.

Thord and Bjoern face the ultimate rescue challenge when a fully loaded truck crashes 40 meters down a mountainside and is destroyed.

Bjoern finds himself in a tough situation when a double accident forces him to ask his rivals for help; Thord tries to rescue a 14-ton tractor.

In the north, Jo Roger's rookies are put to the test by rescuing three vehicles that have tumbled off the road; the tow truck sinks into a deep ditch.

When a massive supermarket truck crashes, Jo Roger enlists his old friend and former employee, Roger, to make a comeback.

Thord and Bjoern find themselves between a rock and a hard place when the police stop them halfway through the rescue of a 35-ton truck; in the north, Jo Roger tries to rescue a truck loaded with ten tons of salmon.

Airport workers work to reunite travelers with their family's heirloom gold Rolex, a $5000 Gucci bag, an espresso maker and a missing prosthetic eye.

With the finish line in sight, the students face their final and big test, as they go head-to-head in a dogfight against an instructor.

Thord and Bjoern find themselves between a rock and a hard place when the police stop them halfway through the rescue of a 35-ton truck; in the north, Jo Roger tries to rescue a truck loaded with ten tons of salmon.

Airport workers work to reunite travelers with their family's heirloom gold Rolex, a $5000 Gucci bag, an espresso maker and a missing prosthetic eye.

With the finish line in sight, the students face their final and big test, as they go head-to-head in a dogfight against an instructor.

Thord and Bjoern take on a marathon, 16-hour rescue, to stop an unstable truck falling off a steep gradient with a large lake below; it involves the men putting themselves in danger.

In the south of Norway, Thord, Bjoern and their army of men are forced to go out into one of the country's worst storms in ten years; they need to rescue a truck loaded with steel girders.

Bjoern is under pressure when a head-on collision between two trucks blocks an ambulance on an emergency call-out; Thord works through the night to rescue a driver trapped in his jack-knifed truck.

Thord and Bjoern face the ultimate rescue challenge when a fully loaded truck crashes 40 meters down a mountainside and is destroyed.

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.

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

Ken's wife gets some surprising news when she arrives for a visit; Big Al has trouble with his excavator; Karl's season is threatened by permafrost.

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

Lisa Kelly finds herself in a real jam after jackknifing her truck deep in the back-country; Alex Debogorski gets more than he bargained for when he falls through a patch of thin ice; Todd Dewey comes to the aid of a stranded trucker.

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.

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

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.

Aardvarks Willie and Peanut go on a blind date that could ultimately produce the park's first-ever aardvark babies; a black rhino undergoes a blood draw; a massive Nile crocodile gets a checkup for his injured tail.

Bertie traverses the Galapagos to film three unique animal behaviors.

A muskrat attack sends a dog to the vet; Dr. Nicole has exciting news.

Bertie is in the Azores to film a spectacular predator feeding frenzy.

Bertie traverses the Galapagos to film three unique animal behaviors.

A muskrat attack sends a dog to the vet; Dr. Nicole has exciting news.

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.

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.

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

Dennis' hunt for gold proves unsuccessful; Ken breaks a machine in his haste to sluice; Karl's season is threatened by floods.

The Pickers load up on Newfoundland collectibles.

A sudden warm-up threatens to derail the ice road season; Art Burke faces scary and slick roads; Lisa Kelly is forced to ask her former boss for financial help; Alex Debogorski encounters a mystery man walking alone on an isolated winter road.

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.

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

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.

Is the Shroud of Turin real? Are jet packs fake? Why do ancient cups have holes?

Jeff meets Instagram pups, a squad of trainee service dogs, and a family of urban mushers and their huskies on a journey to meet a variety of working dogs.

Wildlife activist Benhail Antao confronts his fear of heights when he must rescue a python stuck on a 40-foot-high roof.

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.

Is the Shroud of Turin real? Are jet packs fake? Why do ancient cups have holes?

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

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.

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

Ken takes a roll in his bulldozer; beavers threaten Big Al's operation; Karl's loader springs a leak.

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

Ken takes a roll in his bulldozer; beavers threaten Big Al's operation; Karl's loader springs a leak.

A 35-year-old Amazon parrot has a history of complications with anesthesia and a growth on his leg; Dr. Thielen examines an alligator's leg wound.

Helping a giant lethargic rabbit, an anemic red-shouldered hawk and a wobbly hedgehog.

A pet owner brings in Pixel, a very bloated, 8-year-old dwarf rabbit.

A desert tortoise needs life-saving surgery; a male prairie dog has a little problem down below; a beloved bunny has a major issue with his anesthesia.

A beloved squirrel travels hundreds of miles to see Dr. K; a goat has some serious udder trouble; Dyanne's bunny needs help.

An owl monkey, opossum and coyote come to the clinic.

Dr. K sees a macaw with a broken wing; a bearded dragon is rushed in as an emergency.

Tonga the Lemur comes into the clinic to be spayed; a young rabbit gets a CT scan; a koi fish sees about a mass.

A prairie dog comes in for an examination after he mysteriously loses his top teeth.

Dr. T and Dyanne are called out to a nature center to examine a male peacock.

Hubble, a crested gecko, comes rushing into the clinic after being attacked by the family dog.

Two emergencies and two surgeries make for a busy day at Dr. K's clinic.

Dr. K and her staff have their hands full with unusual cases that are difficult to solve.

Hubble, a crested gecko, comes rushing into the clinic after being attacked by the family dog.

Two emergencies and two surgeries make for a busy day at Dr. K's clinic.

Dr. K and her staff have their hands full with unusual cases that are difficult to solve.

A desert tortoise needs life-saving surgery; a male prairie dog has a little problem down below; a beloved bunny has a major issue with his anesthesia.

A beloved squirrel travels hundreds of miles to see Dr. K; a goat has some serious udder trouble; Dyanne's bunny needs help.

An owl monkey, opossum and coyote come to the clinic.

Dr. K sees a macaw with a broken wing; a bearded dragon is rushed in as an emergency.

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

Ken battles frigid conditions and disappointing returns; an ancient waterfall proves problematic to Cam; Karl's mechanical skills are put to the test.

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

Ken battles frigid conditions and disappointing returns; an ancient waterfall proves problematic to Cam; Karl's mechanical skills are put to the test.

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

Niue is a small island nation with big plans to protect ocean resources.

Exploring San Francisco's artisan baking scene, where sourdough has flour power.

In Guatemala, the humble tortilla makes the world go round.

In Turkey, a national obsession for bread feeds bodies and souls alike.

Gary Mehigan, an Australian chef, travels to Brajbhumi to witness the grand, vibrant and unique celebration of Holi as he engages in a series of activities.

Gary immerses himself in Kerala's 10-day celebrations of Onam, an annual harvest and cultural festival, by participating in exciting activities and sampling local cuisine.

Chef Pablo tags along thousands of devotees as they perform rituals and distribute sweets to celebrate the Ganpati Festival, which is dedicated to Lord Ganesh.

Gary Mehigan explores different parts of Delhi and Hyderabad during Eid-Ul-Fitr, where Muslims celebrate the end of Ramadan with delicacies.

Chef Gary Mehigan experiences the cultural splendor of Nagaland's famed Hornbill festival, an annual celebration which represents the richness of local traditions.

Chef Gary Mehigan lands in Kolkata to soak in the festive spirit of Durga Puja, a Hindu festival where devotees celebrate Goddess Durga's victory over evil.

Chris has always worked to keep his body healthy; now it's time to start looking after his brain. Neurologist Dr. Sharon Sha challenges him to go off-grid into the wilderness without a GPS or map. The hike stirs up Chris' most precious memories.

Rediscovering the true legacies of queens Cleopatra, Nefertiti and Hatshepsut.

Chef Gary Mehigan lands in Kolkata to soak in the festive spirit of Durga Puja, a Hindu festival where devotees celebrate Goddess Durga's victory over evil.

Chris has always worked to keep his body healthy; now it's time to start looking after his brain. Neurologist Dr. Sharon Sha challenges him to go off-grid into the wilderness without a GPS or map. The hike stirs up Chris' most precious memories.

Rediscovering the true legacies of queens Cleopatra, Nefertiti and Hatshepsut.

In Guatemala, the humble tortilla makes the world go round.

In Turkey, a national obsession for bread feeds bodies and souls alike.

Gary Mehigan, an Australian chef, travels to Brajbhumi to witness the grand, vibrant and unique celebration of Holi as he engages in a series of activities.

Gary immerses himself in Kerala's 10-day celebrations of Onam, an annual harvest and cultural festival, by participating in exciting activities and sampling local cuisine.

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.

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.

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

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

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

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.

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.

A suspicious speedboat immediately raises a red flag at headquarters.

The customs surveillance team carries out a special operation.

A high-speed chase tests the limits of the Coastguard's fastest boats.

The Coastguard seizes a boat carrying over 3 tons of drugs.

The Coastguard and other security teams battle enemies on all fronts.