Jim Jones gains a major following in California and enacts a radical plan: a new society in the jungle; soon, abuse rumors prompt an investigation.

As seasons change, Alaskans must be vigilant in their quest for survival.

Tim Shaw and Fuzz Townshend undertake dramatic automobile interventions across the U.K.

Jim Jones gains a major following in California and enacts a radical plan: a new society in the jungle; soon, abuse rumors prompt an investigation.

Sometimes being a little crazy helps to overcome challenges.

Arctic survival forces adaptation on the lives of Alaskans.

Deep winter has Alaskans desperately seeking resources to survive.

Up against countless obstacles, rural Alaskans must work hard to survive.

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.

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 guys go to a 70-mile garage sale in Prince Edward Island that has plenty of treasures and junk.

Dutch inventions and innovators have changed the world, from artists like Rembrandt and Van Gogh to Anne Frank, the first stock exchange, telescopes, submarines, windmills, flowers and gin.

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

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.

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.

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.

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

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

The vets tackle a twisted calving, a flock of ducks and a pack of rats.

Phil Breslin journeys down Australia's river system by kayak, all the way from the rocky rapids to the wide brown estuaries; Phil encounters a duc-billed platypus, a long-finned eel and a bull shark.

Phil Breslin visits the savannah for an encounter with Australia's largest predatory bird, a wedge-tailed Eagle, one of the world's most venomous snakes, the coastal taipan and the frill-necked lizard.

The filmmaker looks at how wolves hunt their prey, such as the bison and musk oxen, offering new perspectives on the way pack predators locate, isolate and kill.

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

Phil Breslin journeys down Australia's river system by kayak, all the way from the rocky rapids to the wide brown estuaries; Phil encounters a duc-billed platypus, a long-finned eel and a bull shark.

Phil Breslin visits the savannah for an encounter with Australia's largest predatory bird, a wedge-tailed Eagle, one of the world's most venomous snakes, the coastal taipan and the frill-necked lizard.

The filmmaker looks at how wolves hunt their prey, such as the bison and musk oxen, offering new perspectives on the way pack predators locate, isolate and kill.

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

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.

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.

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.

After stopping in Peggy's Cove, the guys bet to see who will find the ultimate East Coast prize.

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

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.

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.

Hunting Egypt's lost treasures in the Valley of the Kings.

Hunting Egypt's lost treasures in the Valley of the Kings.

The Bible describes Nineveh as a wicked city of sin; finding if new discoveries in Iraq and Israel can shed light on the events behind this fearsome reputation.

New discoveries unlock the origins of the Bible's flood story.

Archaeologists discover evidence that sheds fresh light on historical influences from Egypt for the biblical tale of the Exodus.

Archaeologists discover new evidence in Iraq that sheds light on the historical influences of the Bible's Tower of Babel story.

Archaeologists make groundbreaking discoveries about the world of Solomon.

Many persons revile King Herod as one of the evil characters in the Bible; later historians coin him Herod "the Great.".

In this enhanced episode, CBP Dulles finds outbound marijuana.

Squibb and Troy repair a sinking float that could cause a massive oil spill.

Many persons revile King Herod as one of the evil characters in the Bible; later historians coin him Herod "the Great.".

In this enhanced episode, CBP Dulles finds outbound marijuana.

Squibb and Troy repair a sinking float that could cause a massive oil spill.

Hunting Egypt's lost treasures in the Valley of the Kings.

Hunting Egypt's lost treasures in the Valley of the Kings.

The Bible describes Nineveh as a wicked city of sin; finding if new discoveries in Iraq and Israel can shed light on the events behind this fearsome reputation.

New discoveries unlock the origins of the Bible's flood story.

With the biggest storm in centuries only a few days away, the truckers race for loads; Art and Todd set out to prove themselves.

The guys come across an old Victorian home while freestyling in Nova Scotia.

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.

The guys come across an old Victorian home while freestyling in Nova Scotia.

An adorable baby wallaby visits the clinic.

A duck has been shot; a pig in labor needs immediate attention; an aging turtle has shell issues.

A young monkey with anger issues is treated; a guinea pig has a lump under its chin.

A duck has a rusty hook in its foot; a very sick ferret is losing weight at an alarming rate; a rabbit with a severely twisted neck; a pretty pig gets a pedicure.

A prairie dog is anything but perky, and a hedgehog might have mites.

Dr. K examines and treats a beloved 10-year-old rabbit that has serious sinus and eye issues.

A parakeet narrowly escapes a cat attack; a newborn bunny fights for its life.

A bunny arrives in desperate need of blood while a monkey with a lump awaits a biopsy.

Dr. K has her hands full with feisty patients, including an ornery pig with a lump in its throat and a sassy skunk that needs an attitude adjustment.

A family of guinea pigs come in for checkups; a tortoise has a suspicious growth; sugar gliders have a slew of unexpected issues.

Dr. K rushes to treat a pet goat with kidney stones, that must undergo two surgeries.

It is sink or swim as Dr. K attempts to solve mobility issues for two goldfish.

Dr. K and her staff have many difficult cases this week.

Dr. K rushes to treat a pet goat with kidney stones, that must undergo two surgeries.

It is sink or swim as Dr. K attempts to solve mobility issues for two goldfish.

Dr. K and her staff have many difficult cases this week.

An adorable baby wallaby visits the clinic.

A duck has been shot; a pig in labor needs immediate attention; an aging turtle has shell issues.

A young monkey with anger issues is treated; a guinea pig has a lump under its chin.

A duck has a rusty hook in its foot; a very sick ferret is losing weight at an alarming rate; a rabbit with a severely twisted neck; a pretty pig gets a pedicure.

The truckers race to deliver their loads while a massive storm approaches; Lisa and Art face a deadly shutdown; Darrell and Todd's feud threatens to rip team Polar apart.

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

The truckers race to deliver their loads while a massive storm approaches; Lisa and Art face a deadly shutdown; Darrell and Todd's feud threatens to rip team Polar apart.

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

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

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.

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

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

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

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

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

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

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

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

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

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.

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

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.

A storm delivers deadly driving conditions as the truckers struggle to deliver their loads.

Big Al gets off to a great start as the gold mining season begins, while Bernie struggles with a rookie crew and Ken suffers mechanical difficulties.

A collector welcomes the guys into his home, garage and bar in Hudson, Quebec.

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

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.

As the community of Port Protection springs forward, Squibb and Troy join forces to repair a sinking float that could cause a massive oil spill.

Sam's youngest son returns, as Veronica learns the basics.

Novice Veronica Arrants risks life and limb to repair the town phone line.

Carl and Morgan attempt to move a thousand-pound sawmill to their property.

Veronica faces a great fear; Sam and Squibb put a web to water.

Sam helps Matt fix up an aging vessel to prepare for fishing season.

Tim Curly Leech finally fixes a ticking time bomb on his property.

With winter on its way, Sam and Squibb band together to build Curly a hoist.

CBP El Paso uncovers a massive meth load in a railcar; HSI Miami investigates a counterfeit passport ring, with a son implicating his own mother.

Spanish Coastguards tackle illegal trafficking by land, sea, and air, securing a record-breaking seizure.

With winter on its way, Sam and Squibb band together to build Curly a hoist.

CBP El Paso uncovers a massive meth load in a railcar; HSI Miami investigates a counterfeit passport ring, with a son implicating his own mother.

Spanish Coastguards tackle illegal trafficking by land, sea, and air, securing a record-breaking seizure.

As the community of Port Protection springs forward, Squibb and Troy join forces to repair a sinking float that could cause a massive oil spill.

Sam's youngest son returns, as Veronica learns the basics.

Novice Veronica Arrants risks life and limb to repair the town phone line.

Carl and Morgan attempt to move a thousand-pound sawmill to their property.

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

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.

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's gold camp is threatened by a flooding river; Karl falls far behind his rivals; Big Al's machines break down as he hunts "smart" gold.

The guys stop at an amateur historian's home in Quebec's Eastern townships.

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

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.

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.

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 explores the global surrogacy market to understand how the dream of starting a family is fueling a babies-for-cash black market.

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

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 explores the global surrogacy market to understand how the dream of starting a family is fueling a babies-for-cash 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.

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.

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.

The truckers battle a massive storm.

Ken believes his gold camp may be cursed; Karl contends with his crew's mistakes and problems with the big machine his father built; Bernie moves his entire operation out of McDame Creek.

On the way to Winnipeg, the van needs some mechanical TLC.

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.

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.

With spring coming, Alaskans must prepare for the changing landscape.

Early spring brings change and deadly risks to rural Alaskans.

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.

Tim Shaw and Fuzz Townshend undertake dramatic automobile interventions across the U.K.

After Rep. Ryan's attack, tensions surge in Jonestown; fifteen cult defectors flee to seek safety, unaware of Jim Jones's sinister plans.

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.

Tim Shaw and Fuzz Townshend undertake dramatic automobile interventions across the U.K.

After Rep. Ryan's attack, tensions surge in Jonestown; fifteen cult defectors flee to seek safety, unaware of Jim Jones's sinister plans.

With spring coming, Alaskans must prepare for the changing landscape.

Early spring brings change and deadly risks to rural Alaskans.

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

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 fiancee, while the discovery of a gold bar and lots of cash spell trouble for another traveller.

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

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

An angry Ken considers firing a worker who disappeared with a crucial piece of equipment; Bernie finally strikes pay dirt; Big Al's camp faces a total shutdown due to equipment problems.

An 84-year-old collector in Balzac, Alberta has a property jam-packed with odd artifacts.

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.

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 fiancee, while the discovery of a gold bar and lots of cash spell trouble for another traveller.

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

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.

Phil Breslin tracks down a yellow-bellied glider, an eastern brown snake and a koala.

Phil Breslin journeys down Australia's river system by kayak, all the way from the rocky rapids to the wide brown estuaries; Phil encounters a duc-billed platypus, a long-finned eel and a bull shark.

Lions have killed four buffaloes during a stampede, and in another drying river, a single buffalo fights off five of the big cats. With the approaching dry winter, going on a game drive involves visiting all the remaining waterholes.

Pets in a jam with quills, fishhooks, and string go to PVS to get unstuck.

Phil Breslin tracks down a yellow-bellied glider, an eastern brown snake and a koala.

Phil Breslin journeys down Australia's river system by kayak, all the way from the rocky rapids to the wide brown estuaries; Phil encounters a duc-billed platypus, a long-finned eel and a bull shark.

Lions have killed four buffaloes during a stampede, and in another drying river, a single buffalo fights off five of the big cats. With the approaching dry winter, going on a game drive involves visiting all the remaining waterholes.

Pets in a jam with quills, fishhooks, and string go to PVS to get unstuck.

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.

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

A jewelry box contains something valuable; a biking teen hits a roadblock; a Thai sailor may be land-locked over computer content; a vagabond musician must prove his worth.

The X-ray machine isn't fooled by aluminum foil wrapping; a truck full of plastic seems like it may have been tampered with.

A British traveler hopes to turn their back on their failed marriage; officers do a close inspection of a car that may contain drugs.

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.

Ken's wife visits the camp; Guillaume has trouble moving the giant sluice machine; Karl's hopes for a big payday continue to fade as the season reaches the halfway point; Big Al tries to get Big Girl working again.

Picking their way through Ontario, the guys may have hit the jackpot on a sprawling property full of outbuildings.

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

A jewelry box contains something valuable; a biking teen hits a roadblock; a Thai sailor may be land-locked over computer content; a vagabond musician must prove his worth.

The X-ray machine isn't fooled by aluminum foil wrapping; a truck full of plastic seems like it may have been tampered with.

A British traveler hopes to turn their back on their failed marriage; officers do a close inspection of a car that may contain drugs.

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

Archaeologists explore hidden tombs and find spectacular mummies.

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.

In this enhanced episode, HSI finds cocaine hidden in frozen avocado pulp.

Sam and Troy embark on a treasure dive while Mary takes a shot at a buck.

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

In this enhanced episode, HSI finds cocaine hidden in frozen avocado pulp.

Sam and Troy embark on a treasure dive while Mary takes a shot at a buck.

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

Archaeologists explore hidden tombs and find spectacular mummies.

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.

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.

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.

A foreign student's possessions are full of surprises; an X-ray machine finds a strange shape inside of a container.

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.

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

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

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

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

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

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

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

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

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