Tempers flare after the group tries hunting for food, when the journey and personalities prove more challenging than anyone expected; in the aftermath of a fight, Theresa and Joshua question if they have what it takes to continue.

Daybi struggles to make amends as the group tackles a grueling paddle on the open ocean; they once again leave little time to erect a shelter finished before nightfall.

Griff Rhys Jones begins his exploration of Ontario and ponders why Canadians are so nice.

With heightened senses verging on superpowers, over two thirds of mammal species are creatures of the night with some even returning to the dark side as their daytime world gets more and more crowded.

Mammals have mastered every environment on Earth, but today the planet is changing rapidly, thanks to one mammal in particular; as humans reshape the planet, mammals must change with it and find surprising ways to survive this new wild.

From freshwater jungle ponds to the dark depths of the open ocean, air breathing mammals have found ways to overcome the challenges of a life in water.

From ice covered seas to snow-capped mountains, mammals have conquered the cold, living in the most inhospitable places on Earth thanks to their intelligence and adaptations.

By pushing themselves and their bodies to the absolute limit, mammals like the camel, echidna, and vampire bat have found remarkable ways to beat the heat, surviving in some of the hottest places on Earth.

David Attenborough reveals why forests are the ultimate test of survival for mammals and how they have overcome the challenges of life in this multidimensional, complex and continually changing environment.

In the Philippines, Steve has a tense and intimidating encounter with a living dinosaur; an arachnid with legs four times longer than its body; during an early morning dive, Steve sees a shark that spends most of the day 550 meters below the surface.

Mexico's Yucatan Peninsula; Steve encounters a bull shark and embarks on a high-octane chase with a sailfish; Steve witnesses a million-strong gathering of bats taking to the night sky.

Alaskans stand their ground as winter brings one final barrage.

In Amboseli, Kenya, an incredibly rare drought event pushes a struggling elephant family to its limits as their only chance to save their dynasty is to work together and overcome the challenge of a lifetime.

Professor Brian Cox ends his homage to science by revealing what science is and how it is always linked to the past.

Steve Backshall leads a team on a mission to make the world's first ascent of a remote mountain in Greenland.

In Amboseli, Kenya, an incredibly rare drought event pushes a struggling elephant family to its limits as their only chance to save their dynasty is to work together and overcome the challenge of a lifetime.

Professor Brian Cox ends his homage to science by revealing what science is and how it is always linked to the past.

Steve Backshall leads a team on a mission to make the world's first ascent of a remote mountain in Greenland.

In Amboseli, Kenya, an incredibly rare drought event pushes a struggling elephant family to its limits as their only chance to save their dynasty is to work together and overcome the challenge of a lifetime.

The Earth's surface is changing faster than ever in human history: cities grow, forests disappear and glaciers melt; a man feeds thousands of parakeets in a city; in Sumatra, a female orangutan and her daughter face life in a forest under threat.

Brian questions how far humans will go in their exploration of the cosmos.

On 2nd August 1932, American physicist Dr Carl Anderson captured the first ever image of antimatter. Antimatter has only ever been glimpsed in fleeting moments because as soon as it comes into contact with matter, both annihilate.

Raja Ampat in the Indonesian archipelago is home to diverse marine life, including manta rays.

Everyone is left shocked after an adventurer calls it quits and leaves the journey for good; the remaining five are torn apart, as some look to potentially branch off on their own.

The strain and stress of two camps affects everyone, with Karly not sure if they should ever reunite, and Theresa struggling to keep everyone moving forward on the journey.

British comedian and travel enthusiast Griff Rhys Jones explores the frozen wilds of Canada's north, in the province of Manitoba.

Raja Ampat in the Indonesian archipelago is home to diverse marine life, including manta rays.

Everyone is left shocked after an adventurer calls it quits and leaves the journey for good; the remaining five are torn apart, as some look to potentially branch off on their own.

The strain and stress of two camps affects everyone, with Karly not sure if they should ever reunite, and Theresa struggling to keep everyone moving forward on the journey.

British comedian and travel enthusiast Griff Rhys Jones explores the frozen wilds of Canada's north, in the province of Manitoba.

Alaskans stand their ground as winter brings one final barrage.

The Earth's surface is changing faster than ever in human history: cities grow, forests disappear and glaciers melt; a man feeds thousands of parakeets in a city; in Sumatra, a female orangutan and her daughter face life in a forest under threat.

Brian questions how far humans will go in their exploration of the cosmos.

After seven months walking, Lev reaches his final country: Egypt; he has 900 miles to go to the Mediterranean but the authorities give him just 45 days to finish.

Levison begins his journey in Afghanistan's remote and inhospitable Wakhan Corridor.

The story of Lusotitan, a colossal, long-necked dinosaur, and its quest for love.

Steve heads to Zambia for the first time, where he hears hippo communication on a whole new level, spots a high-diving crocodile and meets some sniffer dogs who help prevent elephant poaching.

Steve heads to Norway to dive with the planet's ultimate predator: the orca; he also witnesses the northern lights and gets up close to the mighty mouth of a humpback whale.

Gordon Buchanan begins training the cubs for their new life in the wilderness; with just ten weeks left before release, little Pasha is still struggling.

Brian learns that the solar system was once home to two blue planets.

Explaining how freshwater is the lifeblood of planet Earth and why animals depend on it for their survival.

Brian learns that the solar system was once home to two blue planets.

Explaining how freshwater is the lifeblood of planet Earth and why animals depend on it for their survival.

Alaskans prepare for the winter months; Andy hunts moose; Sue heads to Fairbanks for a foot procedure; the hailstones teach their daughters to ice fish; Glenn repairs his cabin.

Sue travels 150 miles to investigate squatters on her property; Andy's sled begins to fall apart while he's collecting firewood; Chip and Agnes brave thin ice to harvest whitefish.

Chip builds a freight sled for winter travel; Sue is forced to brave a dangerous road to get home after a blizzard strands her in Fairbanks; Andy and Kate get their sled dogs ready for winter; Glenn tries to harvest meat for the winter.

When a tiny piece of trash ruins a raccoon's life, Doctor Jessica cuts it free, but Hope faces tough decisions about its future; a volunteer plunges in to save an injured goose.

Scientists work to find ways to safeguard Earth from potential threats posed by asteroids and other cosmic debris.

A journey along Ireland's longest river, the Shannon, through an emerald green landscape of rolling hills and sparkling waters; how Vikings, monks and kings have all made their mark.

When a tiny piece of trash ruins a raccoon's life, Doctor Jessica cuts it free, but Hope faces tough decisions about its future; a volunteer plunges in to save an injured goose.

Scientists work to find ways to safeguard Earth from potential threats posed by asteroids and other cosmic debris.

A journey along Ireland's longest river, the Shannon, through an emerald green landscape of rolling hills and sparkling waters; how Vikings, monks and kings have all made their mark.

When a tiny piece of trash ruins a raccoon's life, Doctor Jessica cuts it free, but Hope faces tough decisions about its future; a volunteer plunges in to save an injured goose.

A hundred days without sunlight approach; Glenn needs to retrieve more wood for heat; Andy and Kate rescue a bear cub; the Hailstones gather resources for themselves and their neighbors; Sue has a long list to complete.

Many leading scientists believe there's a possibility to soon detect the first evidence of extraterrestrial life.

In the remote reaches of Asia's frozen north, creatures must overcome unique challenges, finding exceptional ways to thrive in a hostile world that pushes life to its very limits.

Brian learns that the solar system was once home to two blue planets.

Steve Backshall leads a team on a mission to make the world's first ascent of a remote mountain in Greenland.

A hundred days without sunlight approach; Glenn needs to retrieve more wood for heat; Andy and Kate rescue a bear cub; the Hailstones gather resources for themselves and their neighbors; Sue has a long list to complete.

Tigress Raj Bhera has four new cubs whom she must protect while battling rivals who want to steal her lands and overthrow her.

In the aftermath of a devastating bushfire season, Zac and Darin learn about efforts to rehabilitate the wildlife and livestock population.

Levison takes in the scenery in northern Pakistan's mountain valleys.

Levison reunites with his old friend Binod Parya who once saved his life.

In the aftermath of a devastating bushfire season, Zac and Darin learn about efforts to rehabilitate the wildlife and livestock population.

Levison takes in the scenery in northern Pakistan's mountain valleys.

Levison reunites with his old friend Binod Parya who once saved his life.

A hundred days without sunlight approach; Glenn needs to retrieve more wood for heat; Andy and Kate rescue a bear cub; the Hailstones gather resources for themselves and their neighbors; Sue has a long list to complete.

Many leading scientists believe there's a possibility to soon detect the first evidence of extraterrestrial life.

Tigress Raj Bhera has four new cubs whom she must protect while battling rivals who want to steal her lands and overthrow her.

A hundred days without sunlight approach; Glenn needs to retrieve more wood for heat; Andy and Kate rescue a bear cub; the Hailstones gather resources for themselves and their neighbors; Sue has a long list to complete.

When a tiny fawn gets hit by a car, Doctor Jessica must splint its broken leg or it will never return to the wild; a mother porcupine arrives with baby in tow and both need life-saving attention for a parasitic infection.

Scientists explore how to protect the earth when solar storms destroy earthbound technologies and send satellites crashing to earth.

The journey down the attraction-packed Niagara River is filled with adventure and beauty; navigating the fascinating history and engineering of this border river between Canada and the United States, arriving at the world-famous Niagara Falls.

When a tiny fawn gets hit by a car, Doctor Jessica must splint its broken leg or it will never return to the wild; a mother porcupine arrives with baby in tow and both need life-saving attention for a parasitic infection.

Scientists explore how to protect the earth when solar storms destroy earthbound technologies and send satellites crashing to earth.

The journey down the attraction-packed Niagara River is filled with adventure and beauty; navigating the fascinating history and engineering of this border river between Canada and the United States, arriving at the world-famous Niagara Falls.

When a tiny fawn gets hit by a car, Doctor Jessica must splint its broken leg or it will never return to the wild; a mother porcupine arrives with baby in tow and both need life-saving attention for a parasitic infection.

Dark winter brings new challenges in sub-zero temperatures; Andy maintains snow-covered trails; Sue fixes her generator; the Hailstones build a new teepee; Erik takes his wife hunting.

Many leading scientists believe there is a possibility of detecting the first evidence of extraterrestrial life.

In the aftermath of a devastating bushfire season, Zac and Darin learn about efforts to rehabilitate the wildlife and livestock population.

Levison takes in the scenery in northern Pakistan's mountain valleys.

Levison reunites with his old friend Binod Parya who once saved his life.

Dark winter brings new challenges in sub-zero temperatures; Andy maintains snow-covered trails; Sue fixes her generator; the Hailstones build a new teepee; Erik takes his wife hunting.

Borneo is the richest rainforest island of all; home to 40,000 species of plants and animals, 6,000 of them are unique, and more are discovered almost daily.

Steve heads to Suriname, a country with more forest than anywhere else on Earth; he kayaks upriver in search of some deadly critters.

Steve starts his South African adventure in one of the weirdest places he's ever gone looking for animals: a power station, in the dark. He stakes out the location for a wild cat that has so far eluded the Deadly 60, the serval.

An orphaned baby Triceratops must outwit a deadly Tyrannosaurus rex.

In Florida, Steve dives into the Silver Springs river to swim with a wild alligator; Steve tries to catch an amphiuma.

While on a hunt for the mighty anaconda, Steve is attacked by an unseen predator; Steve takes a dip in piranha-infested waters; in Peru, Steve sees the giant river otter.

Steve heads to Suriname, a country with more forest than anywhere else on Earth; he kayaks upriver in search of some deadly critters.

Steve starts his South African adventure in one of the weirdest places he's ever gone looking for animals: a power station, in the dark. He stakes out the location for a wild cat that has so far eluded the Deadly 60, the serval.

An orphaned baby Triceratops must outwit a deadly Tyrannosaurus rex.

In Florida, Steve dives into the Silver Springs river to swim with a wild alligator; Steve tries to catch an amphiuma.

While on a hunt for the mighty anaconda, Steve is attacked by an unseen predator; Steve takes a dip in piranha-infested waters; in Peru, Steve sees the giant river otter.

Dark winter brings new challenges in sub-zero temperatures; Andy maintains snow-covered trails; Sue fixes her generator; the Hailstones build a new teepee; Erik takes his wife hunting.

Many leading scientists believe there is a possibility of detecting the first evidence of extraterrestrial life.

Borneo is the richest rainforest island of all; home to 40,000 species of plants and animals, 6,000 of them are unique, and more are discovered almost daily.

Dark winter brings new challenges in sub-zero temperatures; Andy maintains snow-covered trails; Sue fixes her generator; the Hailstones build a new teepee; Erik takes his wife hunting.

Just as Hope is scrambling to get ready for her busiest day of the year, the government decides to seize the bear cub Hope's worked so hard to save.

The sudden release of built-up magnetic energy in the solar atmosphere - a solar storm - affects Earth.

A breathtaking journey down the German section of the beautiful Moselle river, famous for vineyards on its dramatically steep banks and remarkable meandering loops.

Just as Hope is scrambling to get ready for her busiest day of the year, the government decides to seize the bear cub Hope's worked so hard to save.

The sudden release of built-up magnetic energy in the solar atmosphere - a solar storm - affects Earth.

A breathtaking journey down the German section of the beautiful Moselle river, famous for vineyards on its dramatically steep banks and remarkable meandering loops.

Just as Hope is scrambling to get ready for her busiest day of the year, the government decides to seize the bear cub Hope's worked so hard to save.

The Hailstones hide emergency supplies along their hunting and trapping routes; Sue's connection with the outside world hangs in the balance; Erik falls while gathering firewood.

Brett and Cliff travel north to the Yukon to try their hand at logging; they aim to find a suitable number of trees that can be cut down and floated to their final destination on the main river bank.

Steve heads to Suriname, a country with more forest than anywhere else on Earth; he kayaks upriver in search of some deadly critters.

Steve starts his South African adventure in one of the weirdest places he's ever gone looking for animals: a power station, in the dark. He stakes out the location for a wild cat that has so far eluded the Deadly 60, the serval.

An orphaned baby Triceratops must outwit a deadly Tyrannosaurus rex.

In Florida, Steve dives into the Silver Springs river to swim with a wild alligator; Steve tries to catch an amphiuma.

While on a hunt for the mighty anaconda, Steve is attacked by an unseen predator; Steve takes a dip in piranha-infested waters; in Peru, Steve sees the giant river otter.

The Hailstones hide emergency supplies along their hunting and trapping routes; Sue's connection with the outside world hangs in the balance; Erik falls while gathering firewood.

The Namib Desert is one of the oldest deserts of all; it's also one of the most diverse; with 50-degree temperatures and half a millimetre of rainfall annually.

Emperor penguins cross a dangerous frozen sea to reach their breeding grounds; rockhoppers brave stormy seas and a 300-foot cliff; tropical humboldt penguins face sea lions and vampire bats as they make their way to their desert nests.

Exploring forests as hidden worlds where the lives of animals are entwined, including temperate forests home to whistling wild dogs, as well as rainforests where ninja treehoppers fight off assassin bugs.

Borneo is the richest rainforest island of all; home to 40,000 species of plants and animals, 6,000 of them are unique, and more are discovered almost daily.

Emperor penguins cross a dangerous frozen sea to reach their breeding grounds; rockhoppers brave stormy seas and a 300-foot cliff; tropical humboldt penguins face sea lions and vampire bats as they make their way to their desert nests.

Exploring forests as hidden worlds where the lives of animals are entwined, including temperate forests home to whistling wild dogs, as well as rainforests where ninja treehoppers fight off assassin bugs.

Borneo is the richest rainforest island of all; home to 40,000 species of plants and animals, 6,000 of them are unique, and more are discovered almost daily.

The Hailstones hide emergency supplies along their hunting and trapping routes; Sue's connection with the outside world hangs in the balance; Erik falls while gathering firewood.

Brett and Cliff travel north to the Yukon to try their hand at logging; they aim to find a suitable number of trees that can be cut down and floated to their final destination on the main river bank.

The Namib Desert is one of the oldest deserts of all; it's also one of the most diverse; with 50-degree temperatures and half a millimetre of rainfall annually.

The Hailstones hide emergency supplies along their hunting and trapping routes; Sue's connection with the outside world hangs in the balance; Erik falls while gathering firewood.

When a Category 2 hurricane slams straight into the rehab, Hope and her team struggle to protect their patients in the middle of the raging storm.

The history of the formation of the world's largest freshwater lake system reveals many mysteries surrounding the geological phenomenon.

New York's Hudson River stretches 315 miles through natural landscapes, from the Adirondack Mountains to the George Washington Bridge and Statue of Liberty.

When a Category 2 hurricane slams straight into the rehab, Hope and her team struggle to protect their patients in the middle of the raging storm.

The history of the formation of the world's largest freshwater lake system reveals many mysteries surrounding the geological phenomenon.

New York's Hudson River stretches 315 miles through natural landscapes, from the Adirondack Mountains to the George Washington Bridge and Statue of Liberty.

When a Category 2 hurricane slams straight into the rehab, Hope and her team struggle to protect their patients in the middle of the raging storm.

Chip and Agnes head to Kiwalik River for hunting and fishing; Sue fabricates snowshoes to scout the tundra; Andy fights through frigid temperatures to replenish his resources; Erik and Martha set fur traps.

During the gold rush, prospectors from all over flock to the Klondike to try their hand at finding their fortune; Brett and Cliff build a rudimentary riverboat to float to the prime gold-panning locations.

Emperor penguins cross a dangerous frozen sea to reach their breeding grounds; rockhoppers brave stormy seas and a 300-foot cliff; tropical humboldt penguins face sea lions and vampire bats as they make their way to their desert nests.

Exploring forests as hidden worlds where the lives of animals are entwined, including temperate forests home to whistling wild dogs, as well as rainforests where ninja treehoppers fight off assassin bugs.

Borneo is the richest rainforest island of all; home to 40,000 species of plants and animals, 6,000 of them are unique, and more are discovered almost daily.

Chip and Agnes head to Kiwalik River for hunting and fishing; Sue fabricates snowshoes to scout the tundra; Andy fights through frigid temperatures to replenish his resources; Erik and Martha set fur traps.

An orphaned baby Triceratops must outwit a deadly Tyrannosaurus rex.

Alaskans brave the awakening landscape as the end of Winter nears.

Frightening ice conditions and poor weather make the early season treacherous; Justin and Mike experience a violent ice-quake that leaves them rattled; Trevor contends with other fishermen setting their nets too close to his.

Levison takes in the scenery in northern Pakistan's mountain valleys.

Alaskans brave the awakening landscape as the end of Winter nears.

Frightening ice conditions and poor weather make the early season treacherous; Justin and Mike experience a violent ice-quake that leaves them rattled; Trevor contends with other fishermen setting their nets too close to his.

Levison takes in the scenery in northern Pakistan's mountain valleys.

Chip and Agnes head to Kiwalik River for hunting and fishing; Sue fabricates snowshoes to scout the tundra; Andy fights through frigid temperatures to replenish his resources; Erik and Martha set fur traps.

During the gold rush, prospectors from all over flock to the Klondike to try their hand at finding their fortune; Brett and Cliff build a rudimentary riverboat to float to the prime gold-panning locations.

Frightening ice conditions and poor weather make the early season treacherous; Justin and Mike experience a violent ice-quake that leaves them rattled; Trevor contends with other fishermen setting their nets too close to his.

Chip and Agnes head to Kiwalik River for hunting and fishing; Sue fabricates snowshoes to scout the tundra; Andy fights through frigid temperatures to replenish his resources; Erik and Martha set fur traps.

A photographer snaps into action to save a turkey vulture's life after it gets trapped under a seal carcass.

A series of violent and dramatic processes leads to the development of the universe, eventually leading to the existence of man.

Bill Nighy narrates a trip along the River Po, traveling across northern Italy from the snow-capped Alps to the delta where it meets the Adriatic Sea.

A photographer snaps into action to save a turkey vulture's life after it gets trapped under a seal carcass.

A series of violent and dramatic processes leads to the development of the universe, eventually leading to the existence of man.

Bill Nighy narrates a trip along the River Po, traveling across northern Italy from the snow-capped Alps to the delta where it meets the Adriatic Sea.

Remote islands offer sanctuary; pygmy three-toed sloth resides on a Caribbean island; nesting albatross thrive in isolation.

The secretive lives of mountain animals; snow leopards come together to help a mother and cub, trapped between rival males.

From the jungles of Brazil to Costa Rica, animals face life in the most competitive place on Earth.

The hostile conditions of Earth's desert regions give rise to the most incredible survival stories on Earth.

Remote islands offer sanctuary; pygmy three-toed sloth resides on a Caribbean island; nesting albatross thrive in isolation.

The secretive lives of mountain animals; snow leopards come together to help a mother and cub, trapped between rival males.

From the jungles of Brazil to Costa Rica, animals face life in the most competitive place on Earth.

At the very end of East Africa's Great Rift Valley, there's a "land that time forgot" ; the rolling grasslands of the Luangwa Valley.

Contemporary issues in science are explored.

A look at Isaac Newton;a visit to CERN.

A danger zone in space above the South Atlantic where lights flash and satellites go haywire; astronauts' first-hand accounts.

Contemporary issues in science are explored.

A look at Isaac Newton;a visit to CERN.

A danger zone in space above the South Atlantic where lights flash and satellites go haywire; astronauts' first-hand accounts.

Andy makes snares; Erik and Martha cut into their last moose quarter; Chip and Agnus hunt caribou; Sue clears the plane runway for her snow machine delivery.

The Grand Banks off the coast of Newfoundland have been contested waters for hundreds of years, as the earliest cod fishermen build a thriving fishing industry; Brett and Cliff take on the North Atlantic as they try their hand at cod fishing.

At the very end of East Africa's Great Rift Valley, there's a "land that time forgot" ; the rolling grasslands of the Luangwa Valley.

Andy makes snares; Erik and Martha cut into their last moose quarter; Chip and Agnus hunt caribou; Sue clears the plane runway for her snow machine delivery.

The Indonesian archipelago lies has the highest number of coral and fish species on earth.

The adventurers are revitalized as they move further inland on the river and problems with their shelter are quickly overcome after another successful hunt; Joshua and Theresa grow closer.

With the seasons turning and food sources low, stress and loneliness push Jody to the edge, leaving the others wondering if they can continue with another loss.

Griff explores the prairies and vast plains of Saskatchewan and Alberta provinces; he discovers that they hide a diversity of riches, from ancient buffalo herds to dinosaur fossils and acres of cultivated farmland.

The Indonesian archipelago lies has the highest number of coral and fish species on earth.

The adventurers are revitalized as they move further inland on the river and problems with their shelter are quickly overcome after another successful hunt; Joshua and Theresa grow closer.

With the seasons turning and food sources low, stress and loneliness push Jody to the edge, leaving the others wondering if they can continue with another loss.

Griff explores the prairies and vast plains of Saskatchewan and Alberta provinces; he discovers that they hide a diversity of riches, from ancient buffalo herds to dinosaur fossils and acres of cultivated farmland.

Exploring the worst mass extinction the planet has ever seen, when as much as 90% of all species died 252 million years ago; this moment in Earth's history took life to the brink, wreaking havoc and destruction on an unprecedented scale.

Earth's journey into the deep freeze starts with fire over 800 million years ago; Long before the age of the dinosaurs, before there was even animal life, the supercontinent Rodinia breaks up.

The story of how plant life turned Earth from a barren rock into a vibrant green world; a four-billion year saga of highs and lows that almost wiped out all life on the planet.

When Earth first formed from clouds of dust and gas 4.6 billion years ago, it was devoid of an atmosphere, an inhospitable rock floating in the black void of space.

Exploring the worst mass extinction the planet has ever seen, when as much as 90% of all species died 252 million years ago; this moment in Earth's history took life to the brink, wreaking havoc and destruction on an unprecedented scale.

Earth's journey into the deep freeze starts with fire over 800 million years ago; Long before the age of the dinosaurs, before there was even animal life, the supercontinent Rodinia breaks up.

The story of how plant life turned Earth from a barren rock into a vibrant green world; a four-billion year saga of highs and lows that almost wiped out all life on the planet.

Alaskans brave the awakening landscape as the end of Winter nears.

On Zambia's plains, a cheetah mother and her three growing daughters must travel thousands of kilometers every year to roam their vast territory searching for food; new challenges arise as the wet season arrives and floodwaters advance.

Focusing on faraway landscapes that are bursting with fire and ice; Professor Cox goes on a journey across the solar system for a look at volcanic eruptions so vast they reach into space; learning why these violent explosions hold the keys to life.

The naturalist visits uncharted territory in the Guiana Shield, finding wildlife that have never encountered humans.

On Zambia's plains, a cheetah mother and her three growing daughters must travel thousands of kilometers every year to roam their vast territory searching for food; new challenges arise as the wet season arrives and floodwaters advance.

Focusing on faraway landscapes that are bursting with fire and ice; Professor Cox goes on a journey across the solar system for a look at volcanic eruptions so vast they reach into space; learning why these violent explosions hold the keys to life.

The naturalist visits uncharted territory in the Guiana Shield, finding wildlife that have never encountered humans.

On Zambia's plains, a cheetah mother and her three growing daughters must travel thousands of kilometers every year to roam their vast territory searching for food; new challenges arise as the wet season arrives and floodwaters advance.

Contemporary issues in science are explored.

A look at Isaac Newton;a visit to CERN.

A danger zone in space above the South Atlantic where lights flash and satellites go haywire; astronauts' first-hand accounts.

Fascinating creatures thrive in the muck.

The group finally feel the power of nature and the healing effects of their journey when they break onto the inner lakes; the return of beloved Elders comes with vital teachings and welcome gifts.

The group learns to harvest and prepare a lake dweller; Daybi reflects on how far he has come and how much more there is to be done, for himself and his people.

Griff uncovers what it is about living in the Pacific Northwest that makes people strive for happiness and what he learned on his journey across Canada.

Fascinating creatures thrive in the muck.

The group finally feel the power of nature and the healing effects of their journey when they break onto the inner lakes; the return of beloved Elders comes with vital teachings and welcome gifts.

The group learns to harvest and prepare a lake dweller; Daybi reflects on how far he has come and how much more there is to be done, for himself and his people.

Griff uncovers what it is about living in the Pacific Northwest that makes people strive for happiness and what he learned on his journey across Canada.

Sir David Attenborough explores the dangerous frontiers created by the world's coasts, where animals fight for survival amid constant change; there are some unexpected residents on Namibia's Skeleton Coast.

Sir David Attenborough reveals new animal behaviors in the ocean.

Trekking across habitats where the rains determine life or death; following an ostrich chick in the fiery Namib desert; a baboon vies for a sip at a watering hole; a maned wolf in a grassy Brazilian oasis.

Explaining how freshwater is the lifeblood of planet Earth and why animals depend on it for their survival.

Sir David Attenborough explores the dangerous frontiers created by the world's coasts, where animals fight for survival amid constant change; there are some unexpected residents on Namibia's Skeleton Coast.

Sir David Attenborough reveals new animal behaviors in the ocean.

Trekking across habitats where the rains determine life or death; following an ostrich chick in the fiery Namib desert; a baboon vies for a sip at a watering hole; a maned wolf in a grassy Brazilian oasis.

Emperor penguins cross a dangerous frozen sea to reach their breeding grounds; rockhoppers brave stormy seas and a 300-foot cliff; tropical humboldt penguins face sea lions and vampire bats as they make their way to their desert nests.

Brian learns about the oldest planet in the solar system Jupiter, which uses its size to manipulate other planets.

Exploring forests as hidden worlds where the lives of animals are entwined, including temperate forests home to whistling wild dogs, as well as rainforests where ninja treehoppers fight off assassin bugs.

Brian learns about the oldest planet in the solar system Jupiter, which uses its size to manipulate other planets.

Exploring forests as hidden worlds where the lives of animals are entwined, including temperate forests home to whistling wild dogs, as well as rainforests where ninja treehoppers fight off assassin bugs.

The Hailstones hide emergency supplies along their hunting and trapping routes; Sue's connection with the outside world hangs in the balance; Erik falls while gathering firewood.

Chip and Agnes head to Kiwalik River for hunting and fishing; Sue fabricates snowshoes to scout the tundra; Andy fights through frigid temperatures to replenish his resources; Erik and Martha set fur traps.

Andy makes snares; Erik and Martha cut into their last moose quarter; Chip and Agnus hunt caribou; Sue clears the plane runway for her snow machine delivery.

When a worldwide pandemic cripples the rehab, wildlife emergencies keep coming in: a bobcat that's been shot, and a massive adult seal; Hope's down to a skeleton crew as critical team members go into quarantine.

The mystery of where water comes from or how it arrived on Earth.

Bill Nighy leads a magical journey in the Norfolk Broads along England's holiday river, the River Bure; discovering a watery world where both wildlife and recreation go hand in hand.

When a worldwide pandemic cripples the rehab, wildlife emergencies keep coming in: a bobcat that's been shot, and a massive adult seal; Hope's down to a skeleton crew as critical team members go into quarantine.

The mystery of where water comes from or how it arrived on Earth.

Bill Nighy leads a magical journey in the Norfolk Broads along England's holiday river, the River Bure; discovering a watery world where both wildlife and recreation go hand in hand.

Exploring forests as hidden worlds where the lives of animals are entwined, including temperate forests home to whistling wild dogs, as well as rainforests where ninja treehoppers fight off assassin bugs.

Animals fight to survive extremes, from tundra to deserts, mountain summits to deep underground.

Questions about how animals adapt to the worlds built by the planet's most invasive species, humans; a search for loot to steal with macaques in Bali; hunting for easy eats with bears in Lake Tahoe; whale poo help fish populations bounce back.

Conservation advocates take risks to save wildlife by exploring remote jungles, going undercover to catch criminals and making a microlight journey to lead endangered birds to safety.

Exploring forests as hidden worlds where the lives of animals are entwined, including temperate forests home to whistling wild dogs, as well as rainforests where ninja treehoppers fight off assassin bugs.

Animals fight to survive extremes, from tundra to deserts, mountain summits to deep underground.

Questions about how animals adapt to the worlds built by the planet's most invasive species, humans; a search for loot to steal with macaques in Bali; hunting for easy eats with bears in Lake Tahoe; whale poo help fish populations bounce back.

Journey from the lava ramparts to its fiery heart, discovering how this place became one of the most important areas of biodiversity in the world.

Leaders and representatives of Aboriginal communities show Zac and Darin how indigenous cultures live to protect and preserve the land.

Levison resumes his journey in Nepal, visiting a crash site 150 meters down a steep cliff.

Accompanied by his old friend and guide Binod, Levison tracks the mountains from eastern Nepal into the country of Bhutan.

Leaders and representatives of Aboriginal communities show Zac and Darin how indigenous cultures live to protect and preserve the land.

Levison resumes his journey in Nepal, visiting a crash site 150 meters down a steep cliff.

Accompanied by his old friend and guide Binod, Levison tracks the mountains from eastern Nepal into the country of Bhutan.

As winter begins to fade and signs of spring appear, Alaskans must start to store supplies for the upcoming months.

During prohibition, men would regularly risk their lives to transport the goods; with the Great Lakes as the backdrop for this endeavour many men were lost; Brett and Cliff try their hands at bootlegging.

Journey from the lava ramparts to its fiery heart, discovering how this place became one of the most important areas of biodiversity in the world.

As winter begins to fade and signs of spring appear, Alaskans must start to store supplies for the upcoming months.

Hope releases the last of her deer herd as spring approaches but one fawn doesn't want to leave.

How hurricanes begin and end and how technological advances are helping combat the dangers they pose.

Traveling the Dordogne River via traditional boats through the green heart of southwest France; drinking wine and hunting for truffles; riding a luxury cruiser to a lighthouse built for a king.

Hope releases the last of her deer herd as spring approaches but one fawn doesn't want to leave.

How hurricanes begin and end and how technological advances are helping combat the dangers they pose.

Traveling the Dordogne River via traditional boats through the green heart of southwest France; drinking wine and hunting for truffles; riding a luxury cruiser to a lighthouse built for a king.

Hope releases the last of her deer herd as spring approaches but one fawn doesn't want to leave.

Spring is on the horizon, and the Alaskans prepare for the coming months as winter ends; Sue Aikens' snow machine crash leaves her with an uncertain future; Sue heads into town to get a diagnosis on her injury.

As pioneers settled North America, many ventured to find their own piece of paradise in the remote wilderness; homesteaders aim was to build a home for their families to grow and flourish; Brett and Cliff are determined they have what it takes.

Leaders and representatives of Aboriginal communities show Zac and Darin how indigenous cultures live to protect and preserve the land.

Levison resumes his journey in Nepal, visiting a crash site 150 meters down a steep cliff.

Accompanied by his old friend and guide Binod, Levison tracks the mountains from eastern Nepal into the country of Bhutan.

Spring is on the horizon, and the Alaskans prepare for the coming months as winter ends; Sue Aikens' snow machine crash leaves her with an uncertain future; Sue heads into town to get a diagnosis on her injury.

At the far tip of South America lies a magical realm that seems frozen in time; known as "the end of the world", this is Patagonia.