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

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

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

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.

Phil Breslin leaves the Australian mainland for some island-hopping fun; he encounters a green sea turtle laying her eggs, a pack of wild dingoes on the hunt and a snake with a terrifying name, Death Adder, lying in ambush.

The filmmaker sheds light on how leopards hunt their prey, such as the impala, catfish and storks, offering new insights into their killer strategies.

Dr. Oakley treats a pair of neglected dogs, and Willow rescues feral cats.

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.

Phil Breslin leaves the Australian mainland for some island-hopping fun; he encounters a green sea turtle laying her eggs, a pack of wild dingoes on the hunt and a snake with a terrifying name, Death Adder, lying in ambush.

The filmmaker sheds light on how leopards hunt their prey, such as the impala, catfish and storks, offering new insights into their killer strategies.

Dr. Oakley treats a pair of neglected dogs, and Willow rescues feral cats.

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.

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

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.

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.

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

Desperate, Big Al pushes Hiro to his limit; Chris looks to salvage his season; PJ and Andy's camp experiences a mini revolt.

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

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.

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.

Homeland Security at JFK International Airport deals with daily issues ranging from fraudulent visas to human trafficking.

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

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

Homeland Security at JFK International Airport deals with daily issues ranging from fraudulent visas to human trafficking.

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

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.

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.

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

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

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

Dr. Oakley lassos a calf, shears an overgrown sheep and treats a dog with an eye injury.

Dr. Oakley treats an emaciated chicken and a dog with a lacerated paw.

Dr. Oakley treats a cherished breeding bull and a cat with a worrying lump.

Dr. Oakley vaccinates a jet-setting chihuahua, tries to outsmart a shifty coyote and meets a cow with an unusual growth.

Dr. Oakley treats a baby elk with a limp, performs a dental on a musk ox and gives a roadside pedicure to a pig.

Dr. Oakley transports baby bison to their new home and treats a pair of therapy reindeer that help a veteran with PTSD.

Dr. Oakley treats a pair of debilitated chickens and a Highland cow that loves to give hugs; a reindeer farm hopes to turn its luck around.

Ahead of Sierra's departure for vet school, the team treats an emu, a dog with a bulging eye and a reindeer with a cracked antler.

It's all hands on deck as Dr. Michelle Oakley treats canines of all kinds.

In Alaska, winter conditions are tough, but Dr. Michelle Oakley is tougher.

Making house calls in the far reaches of Northern Canada is a daunting task in the least, considering the houses may be separated by hundreds of miles. That challenge doesn't stop Dr. Michelle Oakley from performing her many duties as a veterinarian in one of the most rugged environments on Earth. In addition to running an animal clinic out of her home in Haines Junction, Yukon - where she lives with husband Shane and their three daughters - Dr. Oakley also operates a satellite clinic 150 miles away and is the on-call vet for the Yukon Wildlife Preserve, which is about 100 miles from Haines Junction. She also makes house calls, sometimes driving for long stretches through desolate wilderness to check on a patient. This series documents how Dr. Oakley juggles being a full-time vet, wife and mom, and does so with a sense of humor and devotion.

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

Making house calls in the far reaches of Northern Canada is a daunting task in the least, considering the houses may be separated by hundreds of miles. That challenge doesn't stop Dr. Michelle Oakley from performing her many duties as a veterinarian in one of the most rugged environments on Earth. In addition to running an animal clinic out of her home in Haines Junction, Yukon - where she lives with husband Shane and their three daughters - Dr. Oakley also operates a satellite clinic 150 miles away and is the on-call vet for the Yukon Wildlife Preserve, which is about 100 miles from Haines Junction. She also makes house calls, sometimes driving for long stretches through desolate wilderness to check on a patient. This series documents how Dr. Oakley juggles being a full-time vet, wife and mom, and does so with a sense of humor and devotion.

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

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

Dr. Oakley lassos a calf, shears an overgrown sheep and treats a dog with an eye injury.

Dr. Oakley treats an emaciated chicken and a dog with a lacerated paw.

Dr. Oakley treats a cherished breeding bull and a cat with a worrying lump.

Dr. Oakley vaccinates a jet-setting chihuahua, tries to outsmart a shifty coyote and meets a cow with an unusual growth.

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 recurring mine marker points the team east to neighboring Harrison Lake as leads and legend line up; clues found in a 1950s article by an investigative reporter place a lost Spanish gold mine directly on Slumach's path.

Cameras follow U.S. border protection agencies as they man the front lines of national security.

A recurring mine marker points the team east to neighboring Harrison Lake as leads and legend line up; clues found in a 1950s article by an investigative reporter place a lost Spanish gold mine directly on Slumach's path.

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.

Whistleblower testimony reignites a decades-long fight for transparency.

Commercial pilots come forward about their encounters with UFOs.

Scientists unveil cutting-edge technology helping in the search for UFOs.

People talk about close encounters they've had with UFO phenomena.

Reports from people who say they've been abducted are explored; a Harvard psychiatrist who takes them seriously comes under attack.

No longer waiting for the government to share data, citizen scientists and private groups amplify the search for answers.

Looking into the journey and the story behind the notorious Stanford Prison Experiment, as told by its prisoners and guards.

Secrets that unravel Dr. Zimbardo's official story come to light.

Dr. Zimbardo defends his claim to fame; an unexpected reunion takes place.

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

Kathleen Martinez's 20-year hunt for Cleopatra's tomb leads her and a team offshore to explore a mysterious sunken site.

Phil Breslin heads out into the deep blue ocean for a close encounter with the tiger shark, the manta ray and the humpback whale.

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

Kathleen Martinez's 20-year hunt for Cleopatra's tomb leads her and a team offshore to explore a mysterious sunken site.

Phil Breslin heads out into the deep blue ocean for a close encounter with the tiger shark, the manta ray and the humpback whale.

Whistleblower testimony reignites a decades-long fight for transparency.

Commercial pilots come forward about their encounters with UFOs.

Scientists unveil cutting-edge technology helping in the search for UFOs.

People talk about close encounters they've had with UFO phenomena.

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.

Cameras follow U.S. border protection agencies as they man the front lines of national security.

In the American border, agents questions an African traveler with a one-way ticket; in Detroit, a passenger receives a special surprise; officers wait for a drug-smuggler to expulse a pack of cocaine.

Scott discovers a totem pole at the legendary Blackfoot Truck Stop in Alberta.

Massive and sophisticated contributions from Korea have shaped our modern world, from ancient advances like the greenhouse and armoured boats to modern screen technology, online gaming, E-sports and K-Pop.

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

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.

Cameras follow U.S. border protection agencies as they man the front lines of national security.

In the American border, agents questions an African traveler with a one-way ticket; in Detroit, a passenger receives a special surprise; officers wait for a drug-smuggler to expulse a pack of cocaine.

CBP finds an SUV loaded with meth; AMO seizes nearly 2000 kilos of cocaine.

CBP seizes $500K worth of coke; HSI arrests an importer of illegal pills.

CBP and HSI track 25,000 ecstasy pills bound for Philadelphia from Germany.

CBP finds 100 kilos of coke in a banana shipment bound for a Philly bodega.

CBP detains a man suspected of swallowing drugs; AMO agents find $51 million of coke.

LA HSI executes undercover drug buys; CBP intercepts Coyotes at the border.

SD HSI follows a loaded car; CBP and HSI test out a drug detection device.

Customs and Border Protection finds $1 million of cocaine in a cargo truck; Homeland Security Investigations cracks down on a date rape drug.

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

Spanish Coastguards fight against drug trafficking extends to unexpected realms.

Customs and Border Protection finds $1 million of cocaine in a cargo truck; Homeland Security Investigations cracks down on a date rape drug.

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

Spanish Coastguards fight against drug trafficking extends to unexpected realms.

CBP finds an SUV loaded with meth; AMO seizes nearly 2000 kilos of cocaine.

CBP seizes $500K worth of coke; HSI arrests an importer of illegal pills.

CBP and HSI track 25,000 ecstasy pills bound for Philadelphia from Germany.

CBP finds 100 kilos of coke in a banana shipment bound for a Philly bodega.

An Asian woman arrives with an American man who is not her husband; CBP discover a large collection of vapes and vape oils in a traveler's luggage; an officer discovers undeclared items belonging to an American couple returning from Europe.

A traveler is suspected of smuggling cocaine; an officer questions a traveler with low funds and a lengthy travel plan; a family from Canada traveling with a puppy is barking up the wrong tree.

CBP has beef with a traveler when they discover undeclared meat in his fiancé's luggage.

In Buffalo, officers search the vehicle of an American permanent resident; CBP are perplexed by a batch of ceramic pastries.

Scott visits a collector with plenty of outbuildings but soon discovers it has already been picked.

Mexico's gifts to the world include the tomato, the avocado, tacos, tequila, Frida Kahlo, Oscar-winning directors, Mexican wrestling, Latino pop music, silver, rubber, and Mayan astronomy.

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.

An Asian woman arrives with an American man who is not her husband; CBP discover a large collection of vapes and vape oils in a traveler's luggage; an officer discovers undeclared items belonging to an American couple returning from Europe.

A traveler is suspected of smuggling cocaine; an officer questions a traveler with low funds and a lengthy travel plan; a family from Canada traveling with a puppy is barking up the wrong tree.

CBP has beef with a traveler when they discover undeclared meat in his fiancé's luggage.

In Buffalo, officers search the vehicle of an American permanent resident; CBP are perplexed by a batch of ceramic pastries.

Mariana van Zeller investigates a dark and very elusive black market, the illicit trade in human organs.

LSD is booming because of the growing faith in its healing power; Mariana hunts for the elusive chemists responsible for making the world's supply.

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

Mariana goes on a mission to understand how personal and financial data is stolen and sold by a shadowy network of hackers and thieves.

Enhanced: Mariana follows the booming MDMA supply chain.

Violent crime soars in Los Angeles to levels not seen in 30 years; Mariana journeys into gangland to understand the violence plaguing the city.

Mariana embarks on a journey from Africa to the Middle East to investigate how black-market oil is fueling terrorist groups worldwide.

Mariana embeds with a crew of crypto scammers who show her how they make millions of dollars in mere weeks.

Mariana investigates the deadly world of illegal street racing.

Mariana investigates underground fight clubs and the push to bring bare-knuckle fighting into the mainstream.

Mariana embeds with a crew of crypto scammers who show her how they make millions of dollars in mere weeks.

Mariana investigates the deadly world of illegal street racing.

Mariana investigates underground fight clubs and the push to bring bare-knuckle fighting into the mainstream.

Mariana van Zeller investigates a dark and very elusive black market, the illicit trade in human organs.

LSD is booming because of the growing faith in its healing power; Mariana hunts for the elusive chemists responsible for making the world's supply.

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

Mariana goes on a mission to understand how personal and financial data is stolen and sold by a shadowy network of hackers and thieves.

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.

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.

The guys hope to find some great deals to sell out west in southern Ontario.

From early exploration to cutting-edge technologies, Sweden has helped define the modern world through innovations from Viking ship design, IT, dynamite, Nobel prizes, and the music of ABBA.

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

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.

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.

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.

Alaskans must overcome life-threatening obstacles to endure dark winter.

Arctic survival breeds ingenuity in the lives of Alaskans.

Determination, dedication, and grit.

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.

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.