National Geographic (Canada)

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.

Renowned dog behaviorist Cesar Millan comes back not only to rehabilitate dogs, but to train pet parents as well. With empty shelters and dog adoptions at a record high, his return to television gives new pet parents the tools they need to teach their dogs good habits and shed the bad ones. In addition, he helps pet parents better understand the connection that dogs have with their humans, and how

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 dog to help a woman heal; he helps a territorial Maltipom.

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

Cesar rehabs two aggressive German Shepherds, and one very loud Min Pin Mix.

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

Cesar rehabs two aggressive German Shepherds, and one very loud Min Pin Mix.

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.

Renowned dog behaviorist Cesar Millan comes back not only to rehabilitate dogs, but to train pet parents as well. With empty shelters and dog adoptions at a record high, his return to television gives new pet parents the tools they need to teach their dogs good habits and shed the bad ones. In addition, he helps pet parents better understand the connection that dogs have with their humans, and how

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

A Chicago canine unit discovers smugglers; officers enter a high-speed chase in Port Huron; a traveler triggers radiation alarms; bullets in Blaine, Washington.

In the Detroit airport, a family traveling from the UK, may need to corroborate their story. Also, a tip from authorities puts officers at the Chicago International Mail facility on high alert.

Border officers stop a young British visitor meeting an American cyber pal at Detroit Metro Airport, and a Chinese traveler is caught using his mobile phone in a secondary inspection in Chicago.

A strong odor leads to a secondary inspection for two Americans in Port Huron; an officer finds gold at Chicago's O'Hare Airport.

Stories about parallel dimensions.

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.

The early arrival of winter forces Ken on a dangerous drive for fuel; Karl deals with a frozen sluice plant, a broken vehicle, and other assorted troubles; Bernie loses his pay streak and a crew member.

A Chicago canine unit discovers smugglers; officers enter a high-speed chase in Port Huron; a traveler triggers radiation alarms; bullets in Blaine, Washington.

In the Detroit airport, a family traveling from the UK, may need to corroborate their story. Also, a tip from authorities puts officers at the Chicago International Mail facility on high alert.

Border officers stop a young British visitor meeting an American cyber pal at Detroit Metro Airport, and a Chinese traveler is caught using his mobile phone in a secondary inspection in Chicago.

A strong odor leads to a secondary inspection for two Americans in Port Huron; an officer finds gold at Chicago's O'Hare Airport.

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.

Just weeks before the war ends, USS Indianapolis is violently sunk; hundreds of men are lost at sea as they fight off exposure and shark attacks; it is the worst disaster at sea in U.S. Naval history.

Undersea explorers aboard the research vessel Petrel detect a wreck off the coast of the Philippines that fits the profile of an American destroyer.

Hours after emerging victorious in the first carrier-to-carrier battle of World War II, the USS Lexington erupts in flames due to enemy fire; after 80 years, Petrel hopes to spot the wreck and the planes that went down with the ship.

The Petrel team searches for the American aircraft carrier USS Hornet; the ship's life is cut short when the Hornet sails into a hornet's nest of Japanese ships.

What happened aboard the USS Juneau; five brothers are lost, but not all perish when the ship goes down; at least one brother is among scores of men stranded at sea for eight days.

In one night, over 1000 Allied sailors perish when four cruisers go down in flames; Petrel searches for the cruisers in a graveyard littered with ships.

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

Research vessel Petrel picks up what they believe to be the debris trail of the USS Johnston; a manned submersible is deployed to potentially put eyes on the deepest shipwreck in the world.

In one night, over 1000 Allied sailors perish when four cruisers go down in flames; Petrel searches for the cruisers in a graveyard littered with ships.

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

Research vessel Petrel picks up what they believe to be the debris trail of the USS Johnston; a manned submersible is deployed to potentially put eyes on the deepest shipwreck in the world.

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.

Just weeks before the war ends, USS Indianapolis is violently sunk; hundreds of men are lost at sea as they fight off exposure and shark attacks; it is the worst disaster at sea in U.S. Naval history.

Undersea explorers aboard the research vessel Petrel detect a wreck off the coast of the Philippines that fits the profile of an American destroyer.

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.

Stories of the human body reaching beyond the limits of modern medicine.

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.

Stories of the human body reaching beyond the limits of modern medicine.

A guinea pig may need to have its foot amputated; Dr. K performs emergency surgery on a baby bird that can't breathe.

A snapping turtle case stumps Dr. K; a hedgehog gives Dr. T the silent treatment; a feisty pygmy goat stirs up some mischief.

Dr. K's clinic fills up with mysterious cases, including a sugar glider who isn't eating.

A bunny is rushed in after a vicious attack; a pig arrives after eating rat poison.

A baby chicken is missing a wing after an attack; a hedgehog has a bulging eye.

Dr. K's staff has their hands full with a turtle hit by a car and a dehydrated pig.

A lemur is rushed into the clinic barely breathing, and a mouse gets an eye lift.

Dr. K helps Marshmallow, a dwarf hamster, who is having trouble breathing.

Dr. K treats Buddy, a baby skunk with a bloated belly.

A day of mystery unfolds at the clinic as a bearded dragon suffers a peculiar, hard-to-diagnose illness.

A variety of exotic and chaotic patients come into the clinic.

Animal moms in need from reptiles to bunnies get a little help at Dr. K's.

The stakes are high as Dr. K's team works to save a prairie dog from a life-threatening infection; a potbellied pig is rushed in, and a rabbit needs surgery.

A variety of exotic and chaotic patients come into the clinic.

Animal moms in need from reptiles to bunnies get a little help at Dr. K's.

The stakes are high as Dr. K's team works to save a prairie dog from a life-threatening infection; a potbellied pig is rushed in, and a rabbit needs surgery.

A bunny is rushed in after a vicious attack; a pig arrives after eating rat poison.

A baby chicken is missing a wing after an attack; a hedgehog has a bulging eye.

Dr. K's staff has their hands full with a turtle hit by a car and a dehydrated pig.

A lemur is rushed into the clinic barely breathing, and a mouse gets an eye lift.

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.

Three stories of the untapped power of the human brain.

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.

Three stories of the untapped power of the human brain.

Ken uncovers a mother lode of gold after he changes the Beast's location; breakdowns threaten to bring an early end to Bernie's season; Big Al selects a final site for his sluice plant.

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.

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

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

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

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

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

Antoni uncovers the best of London, where history and modern life collide.

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

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

Antoni uncovers the best of London, where history and modern life collide.

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

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.

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

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

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

A family risks losing their stacks of cash; officers are on high alert after an American declares he is packing heat; CBP suspect a traveler is pulling a con job with his US work visa.

A CBP canine tracks a THC-toting traveler.

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

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.

Ken and Guillaume travel over a dangerous mountain pass; Cam worries about getting Gary into the country; Nina and Chris have a difficult start to their season.

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

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

A family risks losing their stacks of cash; officers are on high alert after an American declares he is packing heat; CBP suspect a traveler is pulling a con job with his US work visa.

A CBP canine tracks a THC-toting traveler.

A suspicious speedboat immediately raises a red flag at headquarters.

The customs surveillance team carries out a special operation.

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

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

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

Divers abandon their anti-drug operation to attend to a potential drowning.

The team chases a notorious drug trafficker who tries his luck again.

The coastguard receives a call to help people stuck on a dangerous cliff.

HSI seizes coke found ashore; CBP finds over 120 kilos of meth and stolen cars.

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

The coastguard receives a call to help people stuck on a dangerous cliff.

HSI seizes coke found ashore; CBP finds over 120 kilos of meth and stolen cars.