As a full moon rises, the night shift contends with problem passengers; A staircase installation risks blocking the airport's sole access road.

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.

The airport faces a blackout and a plane has to turn back shortly after take-off with a reported faulty engine.

Brad has just 90 minutes to turn around an Air India flight; a kangaroo keeps Trent on his toes and baggage handler Brodie battles jams.

The Australian Border Force dog unit sniffs out potential criminal activity; Emergency Planning Manager Riki oversees a repatriation flight.

A tarmac collision disrupts passengers; Border Force find contraband and a mysterious plane lands unannounced.

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.

Officers question a man from Texas who arrives with his hunting equipment.

A Dutch woman with a lot of luggage claims she's on a four-day holiday; a Chinese parcel contains a shocking surprise; actor Corey Feldman shows up.

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.

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

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.

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.

Officers question a man from Texas who arrives with his hunting equipment.

A Dutch woman with a lot of luggage claims she's on a four-day holiday; a Chinese parcel contains a shocking surprise; actor Corey Feldman shows up.

The youngest generation of Alaska Natives look to become providers.

Indigenous Alaskans live on ancient lands but face a new climate of challenges.

Alaska Natives battle the seas of the arctic as winter looms.

Alaska Natives battle the seas of the arctic as winter looms.

For the Indigenous Peoples of Alaska, giving up is never an option.

In harsh climates, the land becomes a survival resource for Alaska Natives.

The unpredictability of the arctic in winter challenges Alaska natives.

Alaska Natives strive to maintain Indigenous traditions in their homelands.

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.

An emergency training exercise encounters disturbance due to dangerous winds, flight board failure, and a real-life emergency of an explosion in a passenger terminal.

Alaska Natives strive to maintain Indigenous traditions in their homelands.

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.

An emergency training exercise encounters disturbance due to dangerous winds, flight board failure, and a real-life emergency of an explosion in a passenger terminal.

The youngest generation of Alaska Natives look to become providers.

Indigenous Alaskans live on ancient lands but face a new climate of challenges.

Alaska Natives battle the seas of the arctic as winter looms.

Alaska Natives battle the seas of the arctic as winter looms.

An angry businessman hides the real reason for his hostility; officers try to process some unusual Mexican migrants.

Officers drill an American oil worker with a shady past; a British traveler's proposed reunion with a girlfriend could be cut short.

A sloshed snowboarder causes trouble at the airport; a pair of packages add up to a deadly surprise.

A bad-tempered drill worker returning home from Japan goes one step too far with officers; a Californian woman hides something in her child's stroller.

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.

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.

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.

An angry businessman hides the real reason for his hostility; officers try to process some unusual Mexican migrants.

Officers drill an American oil worker with a shady past; a British traveler's proposed reunion with a girlfriend could be cut short.

A sloshed snowboarder causes trouble at the airport; a pair of packages add up to a deadly surprise.

A bad-tempered drill worker returning home from Japan goes one step too far with officers; a Californian woman hides something in her child's stroller.

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.

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.

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

Features rare wild cats that possess extraordinary skills and unique adaptations for survival to suit their changing environment.

Cesar rehabs an overexcited labrador and a pushy adolescent doberman.

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

Features rare wild cats that possess extraordinary skills and unique adaptations for survival to suit their changing environment.

Cesar rehabs an overexcited labrador and a pushy adolescent doberman.

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.

A Korean bride-to-be tries to enter Canada as a tourist; the Marine Enforcement Team tackles a massive Japanese freighter carrying an illegal passenger.

Officers suspect an IT consultant has arrived for more than just a holiday; a surfer returns from Southeast Asia with a strange souvenir.

The Inland Enforcement Team track down an alleged German sex offender; a detector dog sniffs out trouble in an unclaimed suitcase from Dubai.

A Canadian wanted in Alberta is stopped en route to Ecuador; a parcel of baby food contains surprising ingredients.

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.

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

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.

A Korean bride-to-be tries to enter Canada as a tourist; the Marine Enforcement Team tackles a massive Japanese freighter carrying an illegal passenger.

Officers suspect an IT consultant has arrived for more than just a holiday; a surfer returns from Southeast Asia with a strange souvenir.

The Inland Enforcement Team track down an alleged German sex offender; a detector dog sniffs out trouble in an unclaimed suitcase from Dubai.

A Canadian wanted in Alberta is stopped en route to Ecuador; a parcel of baby food contains surprising ingredients.

Francis Drake is cemented in history as the world's most controversial pirate.

Grace O'Malley defies gender conventions of her day and becomes the most feared and respected leader of both the land and the sea, eventually rising to Chieftain.

Englishman-turned-Algerian pirate John Ward becomes ruler of the Tunisian empire.

Brilliant strategist Morgan takes humans, treasure, and towns without mercy.

Captain Kidd, the treasure hunter, turns from pirate hunter to pirate.

Blackbeard's name strikes fear into all as a brutal diabolical pirate.

Braver than the men, Anne Bonny and Mary Read are ferocious female pirates.

Bartholomew Roberts is the most successful pirate of the Golden Age.

Blackbeard's name strikes fear into all as a brutal diabolical pirate.

Braver than the men, Anne Bonny and Mary Read are ferocious female pirates.

Bartholomew Roberts is the most successful pirate of the Golden Age.

Blackbeard's name strikes fear into all as a brutal diabolical pirate.

Braver than the men, Anne Bonny and Mary Read are ferocious female pirates.

Francis Drake is cemented in history as the world's most controversial pirate.

Grace O'Malley defies gender conventions of her day and becomes the most feared and respected leader of both the land and the sea, eventually rising to Chieftain.

Englishman-turned-Algerian pirate John Ward becomes ruler of the Tunisian empire.

Brilliant strategist Morgan takes humans, treasure, and towns without mercy.

Darrell Ward faces a trail known as "the obstacle course"; Todd Dewey strives to clear a melting ice bridge; Alex Debogorski hauls an oversized fuel tank; Art Burke stumbles onto an ice crossing in the middle of the night.

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

Darrell Ward faces a trail known as "the obstacle course"; Todd Dewey strives to clear a melting ice bridge; Alex Debogorski hauls an oversized fuel tank; Art Burke stumbles onto an ice crossing in the middle of the night.

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

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 rehabs an overprotective Great Dane mix.

A Chihuahua poses a threat to a pet mom's romantic life.

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

Cesar rehabs an overprotective Great Dane mix.

A Chihuahua poses a threat to a pet mom's romantic life.

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.

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.

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.

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.

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.

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

The airport faces a blackout and a plane has to turn back shortly after take-off with a reported faulty engine.

Brad has just 90 minutes to turn around an Air India flight; a kangaroo keeps Trent on his toes and baggage handler Brodie battles jams.

The Australian Border Force dog unit sniffs out potential criminal activity; Emergency Planning Manager Riki oversees a repatriation flight.

A tarmac collision disrupts passengers; Border Force find contraband and a mysterious plane lands unannounced.

Duty manager Dan faces multiple challenges, including managing holiday crowds, handling a self check-in system failure and responding to a critical medical emergency on an incoming flight.

A revolutionary airport trial, 10 years in the making, faces cancellation; Australian Border Force recruit Nelson makes a discovery.

Getting the world's biggest passenger plane off the ground takes a team effort and the airport faces congestion as an I.T. outage hits the border.

As a full moon rises, the night shift contends with problem passengers; A staircase installation risks blocking the airport's sole access road.

Dangerous weapons concealed in luggage test airport security while paramedics rush to treat a passenger suspected of having a stroke.

In this enhanced episode, Stanley explores Italy's industrial heartland.

Stanley discovers that Sicily is an island of contrasts and multiple influences.

In this enhanced episode, Stanley explores Italy's industrial heartland.

Stanley discovers that Sicily is an island of contrasts and multiple influences.

The Australian Border Force dog unit sniffs out potential criminal activity; Emergency Planning Manager Riki oversees a repatriation flight.

A tarmac collision disrupts passengers; Border Force find contraband and a mysterious plane lands unannounced.

Duty manager Dan faces multiple challenges, including managing holiday crowds, handling a self check-in system failure and responding to a critical medical emergency on an incoming flight.

A Russian dissident's complicated past raises questions for officers; a Korean tourist's resume and school diplomas raise eyebrows.

The Inland Enforcement Unit tracks a pair of Honduran drug runners; an American tourist seems to have already put down roots in Canada.

Trouble looms for a young Asian woman carrying someone else's bag, and a pair of Canadians return from a concert in California with more than a T-shirt.

A street performer is caught in the middle of an escape act; a cheeky bus passenger answers questions about his mischievous past.

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.

Karl hopes to score 100 ounces of gold in one week; Ken must deal with an eager employee who keeps breaking equipment.

A window washer falls nearly 50 stories; rocks and boulders move on their own; human feet.

A Russian dissident's complicated past raises questions for officers; a Korean tourist's resume and school diplomas raise eyebrows.

The Inland Enforcement Unit tracks a pair of Honduran drug runners; an American tourist seems to have already put down roots in Canada.

Trouble looms for a young Asian woman carrying someone else's bag, and a pair of Canadians return from a concert in California with more than a T-shirt.

A street performer is caught in the middle of an escape act; a cheeky bus passenger answers questions about his mischievous past.

A high speed chase ending in the BVI lands AMO 1,800 kilos of coke.

The department finds boats in Puerto Rico containing 350 kg of coke and multiple guns.

A pursuit off the coast off Vieques ends by seizing 907 kg of cocaine.

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.

The Port Protection residents are back to paving with good intentions.

Officers in the Port of Savannah intercept a container of stolen vehicles.

Eager to prove herself, Breanna splits from Oliver in search of deer; Terry helps Troy and Sarah while Squibb attacks Veronica's parking problem.

The Port Protection residents are back to paving with good intentions.

Officers in the Port of Savannah intercept a container of stolen vehicles.

Eager to prove herself, Breanna splits from Oliver in search of deer; Terry helps Troy and Sarah while Squibb attacks Veronica's parking problem.

A high speed chase ending in the BVI lands AMO 1,800 kilos of coke.

The department finds boats in Puerto Rico containing 350 kg of coke and multiple guns.

A pursuit off the coast off Vieques ends by seizing 907 kg of cocaine.

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

A distinctive bag has officers seeing double; a photographer misses the big picture; a heavily-modified truck causes concern.

A traveler's textbooks teach him an unexpected lesson; a tourist hits a snag instead of the slopes; officers inspect a shipment of cosmetics.

Officers add charges to a woman's lengthy rap sheet and stumble upon a hair-raising package from Malaysia.

Officers are stumped by a backpacker carrying photos of his criminal activities; an American band gets caught in a jam.

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.

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

A dogfight between alien aircraft and the U.S. Air Force; world's loudest sounds; a fishing trawler.

A distinctive bag has officers seeing double; a photographer misses the big picture; a heavily-modified truck causes concern.

A traveler's textbooks teach him an unexpected lesson; a tourist hits a snag instead of the slopes; officers inspect a shipment of cosmetics.

Officers add charges to a woman's lengthy rap sheet and stumble upon a hair-raising package from Malaysia.

Officers are stumped by a backpacker carrying photos of his criminal activities; an American band gets caught in a jam.

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

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

Mariana investigates the explosive world of armored car heists.

Mariana investigates the growing influence of heavily armed militias.

Mariana investigates the dirty business of bogus addiction treatment.

Mariana investigates a wave of anti-LGBTQ+ violence and uncovers a well-funded global network pushing an anti-gay agenda around the world.

Mariana investigates the deadly world of illegal street racing.

Mariana investigates the illegal trade in shark fins, going face-to-face with hunters and smugglers and undercover to explore the demand in the U.S.

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

Mariana tracks the illicit path of hashish from Morocco into Europe; a world of shadowy dealers, fast smuggling boats and endless wealth.

Mariana investigates the illegal trade in shark fins, going face-to-face with hunters and smugglers and undercover to explore the demand in the U.S.

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

Mariana tracks the illicit path of hashish from Morocco into Europe; a world of shadowy dealers, fast smuggling boats and endless wealth.

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

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

Mariana investigates the explosive world of armored car heists.

Mariana investigates the growing influence of heavily armed militias.

Staff confront an American soldier running scared; a British woman causes confusion with her bag of tricks.

Hidden compartments in a traveler's backpack raise red flags; the discovery of a deadly weapon leaves mail center workers stunned.

Officers look for a message in a bottle; a lack of papers land a group of LA rappers in the doghouse; a young man receives a wake-up call.

An accidental detour leads two Canadians to a dead-end; an ornate frame holds more than just a picture; a man is suspected of money laundering.

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.

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.

Sea lions disappear days before an earthquake; a mysterious medieval manuscript.

Staff confront an American soldier running scared; a British woman causes confusion with her bag of tricks.

Hidden compartments in a traveler's backpack raise red flags; the discovery of a deadly weapon leaves mail center workers stunned.

Officers look for a message in a bottle; a lack of papers land a group of LA rappers in the doghouse; a young man receives a wake-up call.

An accidental detour leads two Canadians to a dead-end; an ornate frame holds more than just a picture; a man is suspected of money laundering.

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 team is in the crystal-clear waters of Bimini in the Bahamas to witness the incredible journey of the great hammerhead shark; as the team follows the shark's migration, they discover the secrets of how these animals navigate the vast ocean.

The team travels to the Dominican Republic in the Caribbean to reveal the greatest secrets in the lives of the North Atlantic humpback whale; they witness a mother defend her calf in the ultimate ocean battle with a pack of orcas.

The team is in the Azores to tag the sixgill shark and learn more about its nightly patterns hunting for food in the abyss; the team tags and retrieves valuable data, uncovering why this shark undertakes its epic journey from the depths at night.

In the Azores, the team follows the elusive sperm whales to their hunting grounds a mile beneath the surface, where they discover the secret lives of these deep-diving whales.

Learning how a population of bowhead whales, once hunted almost to extinction, is faring today; the team is the first to observe the feeding strategies of the deep-sea Greenland shark, an animal that can live for more than 400 years.

The team's mission is to figure out if Svalbard's polar bears are adapting to their environment; they face this giant of the Arctic Ocean and scale a glacier to learn how much time is left for one of the most critical habitats for polar bears.

The airport faces a blackout and a plane has to turn back shortly after take-off with a reported faulty engine.

Security breaches, an air ambulance emergency, drugs found in an unattended bag and an angry passenger add up to a busy Friday for Duty Manager George.

The team's mission is to figure out if Svalbard's polar bears are adapting to their environment; they face this giant of the Arctic Ocean and scale a glacier to learn how much time is left for one of the most critical habitats for polar bears.

The airport faces a blackout and a plane has to turn back shortly after take-off with a reported faulty engine.

Security breaches, an air ambulance emergency, drugs found in an unattended bag and an angry passenger add up to a busy Friday for Duty Manager George.

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 team is in the crystal-clear waters of Bimini in the Bahamas to witness the incredible journey of the great hammerhead shark; as the team follows the shark's migration, they discover the secrets of how these animals navigate the vast ocean.

The team travels to the Dominican Republic in the Caribbean to reveal the greatest secrets in the lives of the North Atlantic humpback whale; they witness a mother defend her calf in the ultimate ocean battle with a pack of orcas.

An American traveler has trouble recalling his hazy past; bad decisions may keep a rugby player off the pitch; a bag is found in a restricted area.

A traveler's belongings raise repeated alarms; a man's reasons for studying in Canada may not be academic; an American couple make the move to Alaska.

A currency dog sniffs out thousands in undeclared cash; an aspiring actor can't keep track of the plot; officers arrest a wanted burglar.

An American's trip to Alaska heads south; officers suspect a convicted drug dealer is taking his business north; a ship containing weapons is searched.

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.

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

A surfer is saved by dolphins; pets identify people about to die; a teen lifts a car.

An American traveler has trouble recalling his hazy past; bad decisions may keep a rugby player off the pitch; a bag is found in a restricted area.

A traveler's belongings raise repeated alarms; a man's reasons for studying in Canada may not be academic; an American couple make the move to Alaska.

A currency dog sniffs out thousands in undeclared cash; an aspiring actor can't keep track of the plot; officers arrest a wanted burglar.

An American's trip to Alaska heads south; officers suspect a convicted drug dealer is taking his business north; a ship containing weapons is searched.

Spring brings a baby boom of goats, reindeer, and puppies to the clinic.

Dr. Pol and Charles cook up a special treat for Mother's Day.

A documentary-style look into the personal lives of the country vets.

Dr. Pol welcomes a new vet, Dr. Olivia, to the clinic.

A challenging farm call turns into an emergency for one of the team.

A Chihuahuas labor stalls, and a curious cat gets hooked.

A family tradition for the generations, it's time for an incredible fair.

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.

Bertie's mission takes him to Tanzania to film cheetahs on the hunt.

A new addition; Doc and Diane welcome a Friesian filly to the family.

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.

Bertie's mission takes him to Tanzania to film cheetahs on the hunt.

A new addition; Doc and Diane welcome a Friesian filly to the family.

Spring brings a baby boom of goats, reindeer, and puppies to the clinic.

Dr. Pol and Charles cook up a special treat for Mother's Day.

A documentary-style look into the personal lives of the country vets.

Dr. Pol welcomes a new vet, Dr. Olivia, to the clinic.

Officers stop a father and son packing loads of ammo, but can't find the gun. Meanwhile, the Vessel Search Unit find a suspect sailor on a US tug.

A young man's lies could keep him from his fiancée, while the discovery of a gold bar and lots of cash spell trouble for another traveler.

Suspicions about a convicted smuggler uncover a scam; questions are raised when officers stumble upon a suitcase full of meat.

Some engineering students carry out an unusual experiment; officers find a construction worker's story has no foundations.

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.

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.

Rocks and boulders in Death Valley; a light show on Brown Mountain; runners in northern Mexico.

Officers stop a father and son packing loads of ammo, but can't find the gun. Meanwhile, the Vessel Search Unit find a suspect sailor on a US tug.

A young man's lies could keep him from his fiancée, while the discovery of a gold bar and lots of cash spell trouble for another traveler.

Suspicions about a convicted smuggler uncover a scam; questions are raised when officers stumble upon a suitcase full of meat.

Some engineering students carry out an unusual experiment; officers find a construction worker's story has no foundations.

Archaeologists exploring the origins of the civilization 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.

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.