National Geographic (Canada)

Strange beetles and butterflies are mailed into Canada that may carry disease.

A captain navigates troubled waters when he forgets to declare himself to the authorities.

Mysterious human-shaped shadow; a little boy travels hundreds of miles in a second; crystal skulls.

Reconstructing the WWII battle in the skies over Britain, the hunt for the deadly Nazi U-boats, the parachute drop at Arnhem, the Allies' bloody struggle through Normandy, the showdown at the Italian Abbey of Montecassino, and the fight for Poland.

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.

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.

According to the World Happiness Report, Ghana's capital city of Accra is the fourth most optimistic place on earth; Rainn explores how boxing, fishing, farming and burying dead people in coffins shaped like condoms can relate to happiness.

Bertie searches the islands of Indonesia for an elusive devil ray.

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.

According to the World Happiness Report, Ghana's capital city of Accra is the fourth most optimistic place on earth; Rainn explores how boxing, fishing, farming and burying dead people in coffins shaped like condoms can relate to happiness.

Bertie searches the islands of Indonesia for an elusive devil ray.

Reconstructing the WWII battle in the skies over Britain, the hunt for the deadly Nazi U-boats, the parachute drop at Arnhem, the Allies' bloody struggle through Normandy, the showdown at the Italian Abbey of Montecassino, and the fight for Poland.

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.