National Geographic (Canada)

The longest campaign of the war pits the deadly stealth of the Nazi U-boats against the code-breaking genius and long-range bombers of the Allies.

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.

Rookie Steph Custance tries to complete the first ice road mission of her career; Alex Debogorski runs into a road block as temperatures soar; Art Burke attempts to deliver to a new community; Darrell Ward braves an unregulated winter road.

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.

Rookie Steph Custance tries to complete the first ice road mission of her career; Alex Debogorski runs into a road block as temperatures soar; Art Burke attempts to deliver to a new community; Darrell Ward braves an unregulated winter road.

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.

The docs at Critter Fixer help 15 celebrity chihuahuas and a baby duckling.

The docs at Critter Fixer help their first capybara and an alpaca farm.

The docs at Critter Fixer move quickly to save a canine bitten by a snake.

The docs at Critter Fixer take Vet for a Day to the Zoo Atlanta.

The docs at Critter Fixer help a laboring bulldog and an aquatic axolotl.

The Docs at Critter Fixer return to FVSU as Homecoming Grand Marshals.

The docs at Critter Fixer rush to aid a big tortoise with a cracked shell.

The Docs at Critter Fixer strive to aid the animals of service members.

The docs at Critter Fixer exemplify treating both ends of the leash.

The Docs at Critter Fixer help a rescued wolf and deliver ten puppies.

The doctors at Critter Fixer attempt to outfit a duck with a prosthetic leg.

The team investigates a string of shark attacks in Australia.

The team investigates an attack on a foil boarder in Australia to find what stimulates an attack; the team meet with hydrodynamic experts.

The doctors at Critter Fixer attempt to outfit a duck with a prosthetic leg.

The team investigates a string of shark attacks in Australia.

The team investigates an attack on a foil boarder in Australia to find what stimulates an attack; the team meet with hydrodynamic experts.

The docs at Critter Fixer take Vet for a Day to the Zoo Atlanta.

The docs at Critter Fixer help a laboring bulldog and an aquatic axolotl.

The Docs at Critter Fixer return to FVSU as Homecoming Grand Marshals.

The docs at Critter Fixer rush to aid a big tortoise with a cracked shell.

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.

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

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.

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

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

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 began 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.

Gary Mehigan, an Australian chef, travels to Brajbhumi to witness the grand, vibrant and unique celebration of Holi as he engages in a series of activities.

Gary immerses himself in Kerala's 10-day celebrations of Onam, an annual harvest and cultural festival, by participating in exciting activities and sampling local cuisine.

Chef Pablo tags along thousands of devotees as they perform rituals and distribute sweets to celebrate the Ganpati Festival, which is dedicated to Lord Ganesh.

Gary Mehigan explores different parts of Delhi and Hyderabad during Eid al-Fitr, where Muslims celebrate the end of Ramadan with delicacies.

Ben Horton explores Guizhou's mystical wilderness, iconic attractions and hidden marvels.

Gary Mehigan explores different parts of Delhi and Hyderabad during Eid al-Fitr, where Muslims celebrate the end of Ramadan with delicacies.

Ben Horton explores Guizhou's mystical wilderness, iconic attractions and hidden marvels.

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.

Gary Mehigan, an Australian chef, travels to Brajbhumi to witness the grand, vibrant and unique celebration of Holi as he engages in a series of activities.

An American arrives at customs with firearms; a traveler makes a breathtaking statement.

An irritated traveler pushes officers to the limit; Haitian fruits may contain more than vitamins.

Following Australian Customs and Border Protection officers as they attempt to enforce the country's various quarantine, customs, immigration, and finance laws.

A woman returning from a trip to China has business cards to a Sydney brothel and passports for three Chinese girls.

Cold weather threatens the miners' operations; Ken contemplates laying off half his crew; Karl's workers hunt moose after their sluice box ices over; Big Al battles beavers.

Harsh flying conditions threaten the search for a historic missing plane.

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.

An American arrives at customs with firearms; a traveler makes a breathtaking statement.

An irritated traveler pushes officers to the limit; Haitian fruits may contain more than vitamins.

Following Australian Customs and Border Protection officers as they attempt to enforce the country's various quarantine, customs, immigration, and finance laws.

A woman returning from a trip to China has business cards to a Sydney brothel and passports for three Chinese girls.

An earth-shattering boom; a paranormal fog on Lake Michigan; a blinding double flash of light.

The villagers of Port Protection are back to paving with good intentions.

Curly shoots a bear; Troy and Sarah struggle with a new water system.

Residents tackle tasks at the height of summer's season of productivity.

All around Port Protection, neighbors lend each other helping hands.

Port Protection's canine community takes center stage.

Curly takes advantage of a break between storms to hunt for deer.

Curly's deer hunt comes to a thrilling end with a shot gone awry; Sam, Troy and Terry struggle with uneven ground to build Troy a bathroom.

CBP finds $200k of weed in luggage; HSI disrupts a Colombian counterfeit ring.

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

Curly's deer hunt comes to a thrilling end with a shot gone awry; Sam, Troy and Terry struggle with uneven ground to build Troy a bathroom.

CBP finds $200k of weed in luggage; HSI disrupts a Colombian counterfeit ring.