National Geographic (Canada)

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.

Darrell and Lisa head into Alberta and onto a trail nicknamed The Death Road; Art faces off with the ice crossing where he nearly lost his life last season; Todd takes rookie Steph Custance under his wing as she embarks on her first journey.

Devastating flash floods threaten Dawson City.

Darrell and Lisa head into Alberta and onto a trail nicknamed The Death Road; Art faces off with the ice crossing where he nearly lost his life last season; Todd takes rookie Steph Custance under his wing as she embarks on her first journey.

Devastating flash floods threaten Dawson City.

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.

It's a wild few days as Dr. K and company try to keep control of crazy critters.

Dr. K wrestles a pot-bellied pig and handles an aggressive squirrel over a challenging few days at the hospital.

Dr. K and the team host a gender reveal party for a tortoise.

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 and the team host a gender reveal party for a tortoise.

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