National Geographic (Canada)

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.

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

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

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.

Devastating flash floods threaten Dawson City.

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.

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

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

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

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.

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.

Finland's impressive defense in the Second World War and the nuclear age.

Chris has done everything possible to delay the aging process. Now he's facing his most extreme and emotional challenge. He's testing the theory that the best way to combat aging and fear of mortality might not be to fight it but accept it.

Finland's impressive defense in the Second World War and the nuclear age.

In the big city, only the most daring and streetwise bugs survive.

Chris has done everything possible to delay the aging process. Now he's facing his most extreme and emotional challenge. He's testing the theory that the best way to combat aging and fear of mortality might not be to fight it but accept it.