Los Angeles is shocked by four shark attacks in four months.

Hawaii is shaken by three bizarre shark attacks in less than five months.

A senior has some unfriendly gear in his RV; a Canadian returning from Panama tells all.

An American is busted trying to catch a different kind of trip; officers help a tipsy traveler.

A heavy automobile container hints at trouble; A student's stash of food brings him discomfort.

A traveler returns with a surprise; Marine officers come upon an infested container.

The guys stop at an amateur historian's home in Quebec's Eastern townships.

A new hire causes Ian to lose his cool; a Dodge Superbee gets a tune-up; an antique toy Packard is restored.

Lisa has to decide help a competitor push further into the arctic unknown or go back to Polar headquarters with her teammates.

A senior has some unfriendly gear in his RV; a Canadian returning from Panama tells all.

An American is busted trying to catch a different kind of trip; officers help a tipsy traveler.

A heavy automobile container hints at trouble; A student's stash of food brings him discomfort.

A traveler returns with a surprise; Marine officers come upon an infested container.

Shark attacks are rare along the northern California coast until seven attacks in 2020 and 2021 leave investigators racing to find a cause.

An unprecedented surge of six shark attacks in just three weeks rocks the popular beaches of New York on one of their busiest days of the year.

In 2021, a spate of seven shark attacks rocks Florida's Treasure Coast, and beach goers want to know why.

An unexpected and mysterious shark species bites beachgoers in Australia.

Experts investigate the first shark attacks ever recorded on Bali's coast.

Every October, shark attacks in Hawaii double; what's behind "Sharktober.".

A series of fatal attacks rocks the South Pacific paradise of New Caledonia.

Five shark attacks in just two summers has South Carolinians scared.

"Jaws" shocked audiences and continues to influence the world 50 years later.

Five shark attacks in just two summers has South Carolinians scared.

"Jaws" shocked audiences and continues to influence the world 50 years later.

Shark attacks are rare along the northern California coast until seven attacks in 2020 and 2021 leave investigators racing to find a cause.

An unprecedented surge of six shark attacks in just three weeks rocks the popular beaches of New York on one of their busiest days of the year.

In 2021, a spate of seven shark attacks rocks Florida's Treasure Coast, and beach goers want to know why.

An unexpected and mysterious shark species bites beachgoers in Australia.

A student is failing his customs exam; officers prevent an artifact from going down in history.

The canine unit brings home the bacon; A traveler discovers she's got a friend in high places.

Joining dedicated teams of agents at Canada's airports and seaports as they intercept visitors smuggling illegal contraband and tourists with tall stories.

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

On the way to Winnipeg, the van needs some mechanical TLC.

Jay struggles with a custom monster truck; David goes to England.

Reigning champ Polar Industries returns, and is looking to maintain its dominance by any means necessary; trucking rival Darrell Ward poaches an ice road legend out from the grips of Polar Industries.

A student is failing his customs exam; officers prevent an artifact from going down in history.

The canine unit brings home the bacon; A traveler discovers she's got a friend in high places.

Joining dedicated teams of agents at Canada's airports and seaports as they intercept visitors smuggling illegal contraband and tourists with tall stories.

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

After three shark attacks, Galveston, Texas, panics and is desperate for answers.

A mysterious rise in shark attacks in Florida leaves experts baffled.

When sharks descend on Maui, Hawaii, in 2016, there's chaos in paradise.

Investigators are baffled by an unusual rise in shark attacks in San Diego.

Twelve shark attacks in two years leave Jacksonville, Fla., residents terrified.

Sharks terrorize Australia's beachgoers along the coast of New South Wales.

Asking if female sharks are the ultimate rulers of the oceans.

A look into how prehistoric land mammals evolved into top ocean predators.

Enhanced; two unlucky swimmers are attacked by sharks twice.

In this enhanced episode, an Alabama beach town is a shark attack hot spot.

In this enhanced episode, three shark attacks occur in the Abaco Islands.

It's a social media feeding frenzy as comedians and experts dive into the fun of the world's most viral shark videos.

Even the biggest and fiercest predators start out as baby sharks.

A look into how prehistoric land mammals evolved into top ocean predators.

It's a social media feeding frenzy as comedians and experts dive into the fun of the world's most viral shark videos.

Even the biggest and fiercest predators start out as baby sharks.

After three shark attacks, Galveston, Texas, panics and is desperate for answers.

A mysterious rise in shark attacks in Florida leaves experts baffled.

When sharks descend on Maui, Hawaii, in 2016, there's chaos in paradise.

Investigators are baffled by an unusual rise in shark attacks in San Diego.

Twelve shark attacks in two years leave Jacksonville, Fla., residents terrified.

Sharks terrorize Australia's beachgoers along the coast of New South Wales.

Asking if female sharks are the ultimate rulers of the oceans.

Art Burke has to cross one of the longest winter roads in the world; Todd Dewey, must dig himself out of mountains of fresh snow or risk a dangerous night in freezing temperatures.

Zuri makes new friends at the airport; native elder comes to visit the grizzly bears.

A young rhino is weaned; Stevie the young bat is introduced to new keepers; two newborn Himalayan mountain goats learn how to be fed by keepers.

Art Burke has to cross one of the longest winter roads in the world; Todd Dewey, must dig himself out of mountains of fresh snow or risk a dangerous night in freezing temperatures.

Zuri makes new friends at the airport; native elder comes to visit the grizzly bears.

A young rhino is weaned; Stevie the young bat is introduced to new keepers; two newborn Himalayan mountain goats learn how to be fed by keepers.

Bertie journeys to South Africa to dive with great white sharks.

Enhanced episode; the lives of white sharks, including when they hunt other sharks.

Two of the deadliest predators go head to head.

White Sharks move north to Canadian waters where scientists investigate.

A journey reveals hammerheads' connection to lunar cycles.

Sharks face off in the ultimate species competition. In 10 nail-biting competitions, we'll prove once and for all which shark is the MVP of the open sea. The great white is favored, but an underdog might just swim into first place.

The remarkable stories of people saved from shark attacks by other species.

Using a new experimental diving cage, two shark biologists investigate rising reports of bull sharks stealing from fishermen in northern Australia.

Sharks sometimes eat the strangest things.

It's a social media feeding frenzy as comedians and experts dive into the fun of the world's most viral shark videos.

Scientists conduct a population study on great whites in California.

Experts and comics react to viral shark videos, along with pop-up facts.

In this enhanced version, experts take shark science into the wild.

Scientists conduct a population study on great whites in California.

Experts and comics react to viral shark videos, along with pop-up facts.

In this enhanced version, experts take shark science into the wild.

Bertie journeys to South Africa to dive with great white sharks.

Enhanced episode; the lives of white sharks, including when they hunt other sharks.

Two of the deadliest predators go head to head.

White Sharks move north to Canadian waters where scientists investigate.

Todd goes on a risky run to deliver the heaviest haul in company history; Art's sent on a high stakes rescue mission; Lisa gets an exclusive contract; Darrell steals a load from Polar.

A young spider monkey rejoins his family; two rare European cranes bred at the zoo move to a new home.

Keepers try to capture a newborn elk who needs shots before it can run fast; the zoo's youngest elephant.

Todd goes on a risky run to deliver the heaviest haul in company history; Art's sent on a high stakes rescue mission; Lisa gets an exclusive contract; Darrell steals a load from Polar.

A young spider monkey rejoins his family; two rare European cranes bred at the zoo move to a new home.

Keepers try to capture a newborn elk who needs shots before it can run fast; the zoo's youngest elephant.

Glass brought light into homes and put the world into focus; people use glass to protect ourselves, cure disease, and create artistic masterpieces.

Diving into the deep to get up-close with sharks.

Sharks are venturing closer to shore; examining the possibility of sharks living on the land.

In this enhanced version, experts take shark science into the wild.

Experts and comics react to viral shark videos, along with pop-up facts.

Bertie journeys to South Africa to dive with great white sharks.

In the Bahamas, over 30% of dolphins have shark bite scars; using a non-toxic gel bite pad and a life-sized dolphin lure, a look at bite impressions of three species that could be predators.

A record number of great white sharks are hunting off Cape Cod.

A fearless team dives in to solve the secret gathering of Maui sharks.

"Jaws" shocked audiences and continues to influence the world 50 years later.

Sharks steal fish from fishing lines; Mackie learns of these cases from locals, but discovers that they indicate larger environmental problems in the Gulf of Mexico.

Ultra-athlete Ross Edgley pits himself against four legendary sharks.

Sharks face off in the ultimate species competition. In 10 nail-biting competitions, we'll prove once and for all which shark is the MVP of the open sea. The great white is favored, but an underdog might just swim into first place.

Sharks steal fish from fishing lines; Mackie learns of these cases from locals, but discovers that they indicate larger environmental problems in the Gulf of Mexico.

Ultra-athlete Ross Edgley pits himself against four legendary sharks.

In this enhanced version, experts take shark science into the wild.

Experts and comics react to viral shark videos, along with pop-up facts.

Bertie journeys to South Africa to dive with great white sharks.

In the Bahamas, over 30% of dolphins have shark bite scars; using a non-toxic gel bite pad and a life-sized dolphin lure, a look at bite impressions of three species that could be predators.

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.

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

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

Polar boss Mark Kohaykewych mixes things up when he brings new soldier Mike Simmons into the winter roads battle; Todd Dewey and rival Darrell Ward both hit a newly opened trail.

The fundamental creation of the wheel helps shape the human experience, but if the wheel suddenly stopped working and society lost the greatest, game-changing accomplishments made using wheel technology, the world would be vastly different.

Big Al gets off to a great start as the gold mining season begins, while Bernie struggles with a rookie crew and Ken suffers mechanical difficulties.

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.

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

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

Up close with some of the largest great white and tiger sharks ever filmed.

It's a social media feeding frenzy as comedians and experts dive into the fun of the world's most viral shark videos.

Shark attacks are rare along the northern California coast until seven attacks in 2020 and 2021 leave investigators racing to find a cause.

The Fourth of July turns bloody as New York sees an unprecedented six shark attacks.

In 2021, a spate of seven shark attacks rocks Florida's Treasure Coast, and beach goers want to know why.

An unexpected and mysterious shark species bites beachgoers in Australia.

Experts investigate the first shark attacks ever recorded on Bali's coast.

Every October, shark attacks in Hawaii double; what's behind "Sharktober.".

Fresh pop-up facts and vivid graphics magnify a series of attacks in Australia.

Experts investigate the first shark attacks ever recorded on Bali's coast.

Every October, shark attacks in Hawaii double; what's behind sharktober?

Up close with some of the largest great white and tiger sharks ever filmed.

Fresh pop-up facts and vivid graphics magnify a series of attacks in Australia.

Experts investigate the first shark attacks ever recorded on Bali's coast.

Every October, shark attacks in Hawaii double; what's behind sharktober?

Up close with some of the largest great white and tiger sharks ever filmed.

It's a social media feeding frenzy as comedians and experts dive into the fun of the world's most viral shark videos.

Shark attacks are rare along the northern California coast until seven attacks in 2020 and 2021 leave investigators racing to find a cause.

The Fourth of July turns bloody as New York sees an unprecedented six shark attacks.

A piece of salmon comes up positive for cocaine; Syrian carpets have something suspicious woven into the fabric.

A man arrives from Beijing with strong readings for narcotics; three men want to visit a temple that hasn't been built yet.

A woman's belongings are positive for heroin; a Malaysian man arrives looking for work.

A woman with protruding pants attracts the attention of Customs; a passenger would rather go to court than pay a fine.

Polar's top dog Todd Dewey gets into trouble with a government contract; truck problems have Polar driver Art Burke's season headed for the gutter; ice road rookie Mike Simmons has his first solo delivery.

Exploring what the world would be like if salt and all of its vital contributions, from food preservation to enabling industry, were to suddenly disappear.

Ken's gold camp is threatened by a flooding river; Karl falls far behind his rivals; Big Al's machines break down as he hunts "smart" gold.

A piece of salmon comes up positive for cocaine; Syrian carpets have something suspicious woven into the fabric.

A man arrives from Beijing with strong readings for narcotics; three men want to visit a temple that hasn't been built yet.

A woman's belongings are positive for heroin; a Malaysian man arrives looking for work.

A woman with protruding pants attracts the attention of Customs; a passenger would rather go to court than pay a fine.

With bonus content, the 360 team investigates a shark bite in Australia.

With bonus content, experts investigate a mysterious cluster of shark bites.

In this enhanced episode, shark bites pop up in Long Island.

With bonus content, experts uncover rare winter bites in California.

With bonus content, experts explore a flurry of shark attacks in Australia.

With bonus content, experts investigate a shark attack on a foil boarder.

Fresh pop-up facts and vivid graphics magnify a series of attacks in Australia.

Experts investigate the first shark attacks ever recorded on Bali's coast.

Every October, shark attacks in Hawaii double; what's behind sharktober?

Special pop-up facts and graphics unpack bull sharks in unexpected waters.

A series of attacks rocks the South Pacific paradise of New Caledonia.

Five shark attacks in just two summers scare South Carolinians.

Discovering the secret life of baby great whites, right off New York City.

Special pop-up facts and graphics unpack bull sharks in unexpected waters.

A series of attacks rocks the South Pacific paradise of New Caledonia.

Five shark attacks in just two summers scare South Carolinians.

With bonus content, the 360 team investigates a shark bite in Australia.

With bonus content, experts investigate a mysterious cluster of shark bites.

In this enhanced episode, shark bites pop up in Long Island.

With bonus content, experts uncover rare winter bites in California.

A woman tries to smuggle an expensive gift into Australia; a package from Hong Kong looks suspicious.

A fidgety passenger has officers on high alert because of what's found under his home's floorboards.

A musician claims to have special powers that help her see the future.

A father and son from China have four suitcases full of undeclared food; an immigration raid targets illegal workers.

Darrell Ward and Lisa Kelly work to make good on a power play for their young company but could lose it all when Darrell's truck breaks down; Polar driver Todd Dewey has to backtrack hundreds of miles to recover lost freight.

The world is literally buzzing with insects; bees, spiders and insects of all shapes and sizes touch every aspect of life, they're the essential workers that pollinate food, clean up the dead and are an integral part of the ecosystem.

Ken believes his gold camp may be cursed; Karl contends with his crew's mistakes and problems with the big machine his father built; Bernie moves his entire operation out of McDame Creek.

A woman tries to smuggle an expensive gift into Australia; a package from Hong Kong looks suspicious.

A fidgety passenger has officers on high alert because of what's found under his home's floorboards.

A musician claims to have special powers that help her see the future.

A father and son from China have four suitcases full of undeclared food; an immigration raid targets illegal workers.

Experts investigate the first shark attacks ever recorded on Bali's coast.

Every October, shark attacks in Hawaii double; what's behind sharktober?

A series of attacks rocks the South Pacific paradise of New Caledonia.

Five shark attacks in just two summers scare South Carolinians.

Shark attacks in the Red Sea as part of a trend worldwide.

Discovering the secret life of baby great whites, right off New York City.

Scientists investigate the giant tiger sharks of Norfolk Island.

Scientists investigate the giant tiger sharks of Norfolk Island.

Whether on the hook or in utero, sharks eat their own and scientists from Australia to Florida use the latest tagging and tracking measures to understand why.

A look into how prehistoric land mammals evolved into top ocean predators.

Ultra-athlete Ross Edgley pits himself against four legendary sharks.

How the giant megalodon shark took over the oceans.

Scientists investigate the giant tiger sharks of Norfolk Island.

Ultra-athlete Ross Edgley pits himself against four legendary sharks.

How the giant megalodon shark took over the oceans.

Experts investigate the first shark attacks ever recorded on Bali's coast.

Every October, shark attacks in Hawaii double; what's behind sharktober?

A series of attacks rocks the South Pacific paradise of New Caledonia.

Five shark attacks in just two summers scare South Carolinians.

Shark attacks in the Red Sea as part of a trend worldwide.

Discovering the secret life of baby great whites, right off New York City.

An American tourist is caught renting by the hour, but insists she needs to meet up with her boyfriend.

At O'Hare International, a returning American's bananas cause a slip-up in secondary; a mother covers for her kid at Detroit's Ambassador Bridge; a car search is brought to a head in Washington State.

Officers search for a fugitive in Washington State; a cook is questioned on his way to Las Vegas; a canine flags several packages in Chicago; x-rays discover anomalies in Port Huron cargo.

An officer's expertise in body language pays off; a German rock band in Detroit; a hole in a traveler's story.

Art Burke attempts to keep his rig above ground on a melting ice crossing; polar driver Alex Debogorski battles his way up a mud covered mountain.

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

An angry Ken considers firing a worker who disappeared with a crucial piece of equipment; Bernie finally strikes pay dirt; Big Al's camp faces a total shutdown due to equipment problems.

An American tourist is caught renting by the hour, but insists she needs to meet up with her boyfriend.

At O'Hare International, a returning American's bananas cause a slip-up in secondary; a mother covers for her kid at Detroit's Ambassador Bridge; a car search is brought to a head in Washington State.

Officers search for a fugitive in Washington State; a cook is questioned on his way to Las Vegas; a canine flags several packages in Chicago; x-rays discover anomalies in Port Huron cargo.

An officer's expertise in body language pays off; a German rock band in Detroit; a hole in a traveler's story.

Marine biologists examine why sharks attack boats.

Marine biologists examine why sharks attack boats.

In 2007, Los Angeles was in shock when four shark attacks happened in just three months.

Hawaii is shaken by three bizarre shark attacks in less than five months.

Ten shark attacks leave visitors reeling off Florida's Space Coast in 2003.

Two unlucky ocean lovers encounter sharks on two different occasions.

Investigators seek the cause behind a strange surge of shark attacks in Texas.

Three brutal shark attacks in the Abaco Islands in just thirty-nine days.

Fresh pop-up facts and vivid graphics magnify a series of attacks in Australia.

Special pop-up facts and graphics unpack bull sharks in unexpected waters.

Sharks show up in unexpected places in what seems like a global invasion.

Special edition pop-up facts and graphics reveal emerging shark attack hotspots.

Whether on the hook or in utero, sharks eat their own and scientists from Australia to Florida use the latest tagging and tracking measures to understand why.

Sharks show up in unexpected places in what seems like a global invasion.

Special edition pop-up facts and graphics reveal emerging shark attack hotspots.

Whether on the hook or in utero, sharks eat their own and scientists from Australia to Florida use the latest tagging and tracking measures to understand why.

Marine biologists examine why sharks attack boats.

Marine biologists examine why sharks attack boats.

In 2007, Los Angeles was in shock when four shark attacks happened in just three months.

Hawaii is shaken by three bizarre shark attacks in less than five months.

Ten shark attacks leave visitors reeling off Florida's Space Coast in 2003.

Two unlucky ocean lovers encounter sharks on two different occasions.

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 Detroit airport, a family travelling 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 traveller 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.

Darrell and Lisa fight to make it home over the hardest-hit trail; Art and the King of Obsolete reunite to haul a huge double trailer over a slick path; veteran Alex Debogorski races against the clock to deliver to a town in need.

Massive and sophisticated contributions from Korea have shaped our modern world, from ancient advances like the greenhouse and armoured boats to modern screen technology, online gaming, E-sports and K-Pop.

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.

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 Detroit airport, a family travelling 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 traveller 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.

Interviews, outtakes and never-before-seen footage provide insight into the chaos and creativity behind the making of Steven Spielberg's legendary blockbuster "Jaws.".

Whether on the hook or in utero, sharks eat their own and scientists from Australia to Florida use the latest tagging and tracking measures to understand why.

A series of attacks rocks the South Pacific paradise of New Caledonia.

Five shark attacks in just two summers scare South Carolinians.

It's a social media feeding frenzy as comedians and experts dive into the fun of the world's most viral shark videos.

Every October, shark attacks in Hawaii double; what's behind "Sharktober.".

A series of fatal attacks rocks the South Pacific paradise of New Caledonia.

Five shark attacks in just two summers has South Carolinians scared.

Special edition pop-up facts and graphics aid research into surfing attacks.

White Sharks move north to Canadian waters where scientists investigate.

Whether on the hook or in utero, sharks eat their own and scientists from Australia to Florida use the latest tagging and tracking measures to understand why.

Special edition pop-up facts and graphics aid research into surfing attacks.

White Sharks move north to Canadian waters where scientists investigate.

Interviews, outtakes and never-before-seen footage provide insight into the chaos and creativity behind the making of Steven Spielberg's legendary blockbuster "Jaws.".

Whether on the hook or in utero, sharks eat their own and scientists from Australia to Florida use the latest tagging and tracking measures to understand why.

A series of attacks rocks the South Pacific paradise of New Caledonia.

Five shark attacks in just two summers scare South Carolinians.

The two rival companies work together to take on the biggest challenge in Ice Road Truckers history, pulling a cat train across the frozen Hudson Bay, but the untested ice shatters under the weight of the heavy haul.

A lowland gorilla has a baby; keepers want to relocate an arctic wolf; a custodian bonds with orangutans.

The lowland gorilla's baby is not feeding well; young fruit bat spreads his own wings; keepers welcome twin moose.

The two rival companies work together to take on the biggest challenge in Ice Road Truckers history, pulling a cat train across the frozen Hudson Bay, but the untested ice shatters under the weight of the heavy haul.

A lowland gorilla has a baby; keepers want to relocate an arctic wolf; a custodian bonds with orangutans.

The lowland gorilla's baby is not feeding well; young fruit bat spreads his own wings; keepers welcome twin moose.

The remarkable stories of people saved from shark attacks by other species.

Scientists investigate the giant tiger sharks of Norfolk Island.

White Sharks move north to Canadian waters where scientists investigate.

With bonus content, ultra-athlete Ross Edgley pits himself against sharks.

How the giant megalodon shark took over the oceans.

Using a new experimental diving cage, two shark biologists investigate rising reports of bull sharks stealing from fishermen in northern Australia.

Shark attacks in the Red Sea as part of a trend worldwide.

A record number of great white sharks are hunting off Cape Cod.

A record number of great white sharks are hunting off Cape Cod.

Interviews, outtakes and never-before-seen footage provide insight into the chaos and creativity behind the making of Steven Spielberg's legendary blockbuster "Jaws.".