In this enhanced episode, Alaskans secure all loose ends before winter.

Alaskans face emotional challenges as they push through a dark winter.

Alaskans seek out vital resources amid a deep freeze.

For remote Alaskans, no task is completed easily with the harshness of winter.

Alaskans break trail and hunt for their survival during the tail end of the brutal winter.

Alaskans embrace change as winter loosens its icy grip on the Arctic.

As winter's edge approaches, the race is on for Alaskans to complete the last of their winter tasks before the landscape and waterways thaw.

Hope revisits a completely rebuilt rehab and reveals new plans; Hope and Barry discover a problem plaguing massive marine mammals.

Soaring high above the incredible landscapes along BC's Kootenay border region.

How the earth's atmosphere came to be; the one man to have braved the atmosphere's upper reaches and survived.

Hope rallies the team to release a herd of white-tailed deer; winter brings a mysterious influx of snowy owls.

The vast and diverse terrain that lies at the border of Canada and the United States.

The end of winter has arrived, and Alaskans venture out in search of survival necessities.

The women of Alaska must seize opportunities for resources during the brief arctic spring.

Alaskans emerge from a long winter and seize new opportunities to travel, hunt, and farm while facing the dangers from thawing rivers.

Ricko DeWilde and his son, Skyler, set out on a spring hunt for an Athabaskan ritual; Sue Aikens races the clock to establish a new tundra garden; the Hailstones welcome Carol back to Kiwalik camp; Andy Bassich and Denise Becker track a predator.

As the warm season continues, Alaskans contend with the annual environmental changes that shift the daily struggles and rewards of their environment.

The last few weeks of summer are upon Alaskans, bringing the need for hunting, fishing and harvesting bounty in the Arctic.

Alaskans gather food and make upgrades to their homes as the Arctic Summer wanes.

Alaskans seize the final harvests of summer before dark winter returns to the landscape.

As the brief Fall season dwindles, Alaskans must race to secure resources and finalize projects before the deep cold returns to reclaim the Arctic.

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.

Looking at the spaces between planets, where shadowy realms exist without light.

Exploring powerful lightning, mountains with strange, metallic frosts and monsoon rains on a moon that is a billion miles away from Earth.

Professor Brian Cox explores the solar system's frozen worlds; he meets the dwarf planet where mountains of solid ice float across the surface, the black and white moon painted with frost and a world illuminated by a strange form of ice.

Brian journeys across the solar system and explores its weirdest worlds, the misfits and oddballs; he discovers the forces that sculpted bizarre features and strange phenomena.

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 when long before the age of the dinosaurs, before there was even animal life, the giant 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.

How dramatic twists in Earth's story enabled humans to go from being part of nature to controlling it.

The loyalist city of Saint John and international borders beyond, one of the worlds most famous waterways.

The 2008 Super Tuesday tornado outbreak is investigated to see why the storms occurred mid-winter and why tornados remain so enigmatic.

A team of astronomers determine the ultimate fate of Earth, several billion years from now.

Comic Ron James helps harvest a key ingredient; a red-colored syrup; trout lily and sumac.

Gathering a Wild Harvest staple while RV camping; a new tree flavor; a twist on a classic soup and dessert.

An enormous fiery vortex in Redding, California, the island nation of Malta loses a natural treasure, a mysterious radioactive hotspot is discovered near Chernobyl, and an unknown force lays waste to a mountain forest in Italian Alps.

Tapping into Gregg's childhood passion and watching an Alstom electric train roll down the production line; visiting the U.K.'s last aluminum-smelting plant with Cherry; exploring the legacy of an antique electrified rail line in Brighton with Ruth.

Rolling down the line with a 187-ton train and touring the UK's last aluminum plant.

A look at the construction process behind the double-decker bus in Yorkshire and why they were crucial during WWI.

Gregg Wallace visits a factory that produces six million Jaffa Cakes every day, while Cherry Healey travels to Jaffa, a city famous for its oranges and the namesake of the irresistible cakes.

Gregg Wallace explores the Vale of Mowbray pork pie factory in Northallerton, Yorkshire, which began making pork pies in 1928; he visited the factory in May 2022, following production of their 75g snack-sized traditional pork pie.

Probing the chemistry behind an essential UK treat and flip for perfect pancakes.

Wallace visits a Yorkshire team that churns out up to 90,000 vegan sausages a day; Cherry Healey discovers how Canadian soybeans are transformed into protein-packed tofu.

Gregg Wallace explores an Ambrosia factory that makes up to 360,000 rice puddings daily; Cherry Healey finds out how Alps fresh water is used to grow over a million tonnes of rice annually.

Gregg visits a factory that churns out 32 million mints per day; Cherry Healey visits the largest sugar beet factory in Europe; Ruth Goodman explores minty mouthwash marketing.

In the wake of Hurricane Maria, Zac explores sustainability in Puerto Rico where he meets chef José Andrés, milks a goat and eats ceviche.

Zac and Darin get an up-close look at Iceland's renewable energy efforts; they also soak in a spa, sample reindeer meat and view natural wonders.

Zac learns about beekeeping on a New York City rooftop, then he heads to London to check out its pollution-reduction efforts, from wall gardening to trash collecting.

Before heading to Paris to learn about its tap water system, Zac joins friend Anna Kendrick for a lesson in H2O from a water sommelier in Los Angeles.

In Costa Rica, Zac and Darin try out life in a swanky eco-village committed to a small environmental footprint; they visit a wildlife refuge and enjoy a zip-lining trip.

Sardinia boasts a notable number of centenarians, causing Zac to rethink his views on nutrition as he ponders how the locals live such long healthy lives.

Zac and Darin head to Peru to delve into potato cryopreservation, biopiracy and the sport of sandboarding.

From Sydney to the Greater Blue Mountains, Zach and Darin meet with leading eco-warriors to learn about protected lands and habitat conservation.

Zac and Darin get down and dirty as they explore a natural approach to farming through regenerative agriculture and organic food production.

Along the coastline, Zac and Darin take a deep dive into the coral reef restoration techniques supporting a vast underwater ecosystem.

The natural wonders of the Gaspe Peninsula.

Missions are heading to Jupiter to discover how planets form and to find out if there is life on the planets four largest moons.

The diamond's rise from gemstone to a cutting-edge material that is set to revolutionize electronics.

Focusing on only one ingredient.

Visiting a seed farm on an island off the West Coast.

A long-forgotten network of Native American earthworks, a baffling battlefield mystery in Belgium, a mysterious blood red lake on a remote Greek island, and an eerie pink glow emulating form the middle of the Pacific Ocean.

Zac and Darin test their cooking skills in Melbourne, Australia, before heading to the Torres Strait Islands to understand the impact of rising sea levels.

Searching for ways to minimize their carbon footprints, Zac and Darin visit a self-sustaining home and other business innovating to reduce waste.

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

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

Eco-innovators introduce Zac and Darin to unique and cost-effective ways to address complex problems and help heal the environment.

The surprising similarities humans share with whales; Steve goes on an underwater expedition to learn about singing humpbacks, matriarchal sperm whales and playful dolphins and examines how humans early fear of whales eventually turned to wonder.

Steve encounters the largest and most sophisticated hunters on the planet; he reveals the ingenious strategies used by whales that gets extraordinary predators in trouble.

Naturalist Steve Backshall free dives into the world of whales, orcas, and dolphins as he explores their habitats, relationships, behaviors, and the threats faced by these mammals.

Steve returns home to the Atlantic waters of the British Isles as he considers the question of what humanity can do to ensure the enduring future of whales.

Traveling from the frigid, icy waters of Alaska to the balmy, serene seas of the tropics; seeing how varied shark species really are; getting insight into their lives, learning why these endangered creatures are not monsters at all.

Steve goes on a mission to learn whether the sharks of the Indian Ocean are capable of adapting to rapidly changing conditions like climate change, overfishing, and pollution.

Setting out on an odyssey across the Indian Ocean to see whether the hunters are adapting to the rapidly changing planet; traveling from the coast of South Africa to the Maldives, coming face-to-face with oceanic blacktip sharks.

Steve Backshall travels from the icy waters of Alaska to the tropics to study the life of sharks.

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.

Sir David Attenborough explains how freshwater is the lifeblood of planet Earth and why animals depend on it for their survival.

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.

Hope's first orphaned mammal arrives earlier than ever; a mysterious patient from last year returns.

Exploring the landscape and archaeology of Alberta's foothills and badlands from Calgary to Drumheller.

The search for the building blocks of life on Mars; an attempt to prove life was, or is, possible on the red planet.

Tending to a stressed muskrat trapped in a fence and a slate of slippery patients.

Exploring the frontier region of Saskatchewan from Cypress Hills Provincial Park to the open prairie lining the 49th parallel.

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.

The team travels to every corner of the planet over the course of five years.

Alaskans brave the dangers of the Arctic to prepare for Dark Winters return.

Sue Aikens tracks a deadly foe in Kavik; the Hailstones embark on a traditional task ahead of the freeze; Jessie Holmes adds a vital comfort to his remote camp; Ricko Dewilde guides his youngest children through the wilderness.

Lessons are learned; personal battles are fought by Alaskans enduring winter's descent.

In this enhanced episode, Alaskans secure all loose ends before winter.

Alaskans face emotional challenges as they push through a dark winter.

Alaskans seek out vital resources amid a deep freeze.

For remote Alaskans, no task is completed easily with the harshness of winter.

Alaskans break trail and hunt for their survival during the tail end of the brutal winter.

Alaskans embrace change as winter loosens its icy grip on the Arctic.

As winter's edge approaches, the race is on for Alaskans to complete the last of their winter tasks before the landscape and waterways thaw.

The end of winter has arrived, and Alaskans venture out in search of survival necessities.

The women of Alaska must seize opportunities for resources during the brief arctic spring.

Alaskans emerge from a long winter and seize new opportunities to travel, hunt, and farm while facing the dangers from thawing rivers.

Ricko DeWilde and his son, Skyler, set out on a spring hunt for an Athabaskan ritual; Sue Aikens races the clock to establish a new tundra garden; the Hailstones welcome Carol back to Kiwalik camp; Andy Bassich and Denise Becker track a predator.

As the warm season continues, Alaskans contend with the annual environmental changes that shift the daily struggles and rewards of their environment.

The last few weeks of summer are upon Alaskans, bringing the need for hunting, fishing and harvesting bounty in the Arctic.

A baby owl needs to be reunited with its parents; a volunteer returns to the rehab in a new role; a duck rescue goes wet and wild.

Journey along the Manitoba-United States border's wide-open frontier with incredible landscapes and stories of human migration.

The Cassini-Huygens spacecraft has been sending images and a wealth of scientific revelations from Saturn's orbit since 2004.

Busier than ever, Hope and the team struggle to handle the huge caseload; a volunteer helps an injured bird.

An aerial journey along the shores of Lake Superior, exploring the city of Thunder Bay and the vast, natural wonders of the world's largest freshwater lake.

Alaskans gather food and make upgrades to their homes as the Arctic Summer wanes.

Alaskans seize the final harvests of summer before dark winter returns to the landscape.

As the brief Fall season dwindles, Alaskans must race to secure resources and finalize projects before the deep cold returns to reclaim the Arctic.

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.

Looking at the spaces between planets, where shadowy realms exist without light.

Exploring powerful lightning, mountains with strange, metallic frosts and monsoon rains on a moon that is a billion miles away from Earth.

Professor Brian Cox explores the solar system's frozen worlds; he meets the dwarf planet where mountains of solid ice float across the surface, the black and white moon painted with frost and a world illuminated by a strange form of ice.

Brian journeys across the solar system and explores its weirdest worlds, the misfits and oddballs; he discovers the forces that sculpted bizarre features and strange phenomena.

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 when long before the age of the dinosaurs, before there was even animal life, the giant 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.

How dramatic twists in Earth's story enabled humans to go from being part of nature to controlling it.

Tapping into Gregg's childhood passion and watching an Alstom electric train roll down the production line; visiting the U.K.'s last aluminum-smelting plant with Cherry; exploring the legacy of an antique electrified rail line in Brighton with Ruth.

Rolling down the line with a 187-ton train and touring the UK's last aluminum plant.

A look at the construction process behind the double-decker bus in Yorkshire and why they were crucial during WWI.

Gregg Wallace visits a factory that produces six million Jaffa Cakes every day, while Cherry Healey travels to Jaffa, a city famous for its oranges and the namesake of the irresistible cakes.

Gregg Wallace explores the Vale of Mowbray pork pie factory in Northallerton, Yorkshire, which began making pork pies in 1928; he visited the factory in May 2022, following production of their 75g snack-sized traditional pork pie.

Probing the chemistry behind an essential UK treat and flip for perfect pancakes.

Starting up a raccoon adoption agency; Hope tries to make peace between wild enemies; a kidnapped fawn needs to be reunited with its mother.

From high above Sault Ste. Marie, exploring the rugged Lake Huron coastline and scenic lakeside communities.

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

A new volunteer steps up to the challenge; Hope's first fawn of the year interrupts delicate surgery on an injured owl.

Exploring the history and landscape of the Lake Erie region, from Windsor and Detroit to the town of Port Dover and beyond.

Wallace visits a Yorkshire team that churns out up to 90,000 vegan sausages a day; Cherry Healey discovers how Canadian soybeans are transformed into protein-packed tofu.

Gregg Wallace explores an Ambrosia factory that makes up to 360,000 rice puddings daily; Cherry Healey finds out how Alps fresh water is used to grow over a million tonnes of rice annually.

Gregg visits a factory that churns out 32 million mints per day; Cherry Healey visits the largest sugar beet factory in Europe; Ruth Goodman explores minty mouthwash marketing.

In the wake of Hurricane Maria, Zac explores sustainability in Puerto Rico where he meets chef José Andrés, milks a goat and eats ceviche.

Zac and Darin get an up-close look at Iceland's renewable energy efforts; they also soak in a spa, sample reindeer meat and view natural wonders.

Zac learns about beekeeping on a New York City rooftop, then he heads to London to check out its pollution-reduction efforts, from wall gardening to trash collecting.

Before heading to Paris to learn about its tap water system, Zac joins friend Anna Kendrick for a lesson in H2O from a water sommelier in Los Angeles.

In Costa Rica, Zac and Darin try out life in a swanky eco-village committed to a small environmental footprint; they visit a wildlife refuge and enjoy a zip-lining trip.

Sardinia boasts a notable number of centenarians, causing Zac to rethink his views on nutrition as he ponders how the locals live such long healthy lives.

Zac and Darin head to Peru to delve into potato cryopreservation, biopiracy and the sport of sandboarding.

From Sydney to the Greater Blue Mountains, Zach and Darin meet with leading eco-warriors to learn about protected lands and habitat conservation.

Zac and Darin get down and dirty as they explore a natural approach to farming through regenerative agriculture and organic food production.

Along the coastline, Zac and Darin take a deep dive into the coral reef restoration techniques supporting a vast underwater ecosystem.

Zac and Darin test their cooking skills in Melbourne, Australia, before heading to the Torres Strait Islands to understand the impact of rising sea levels.

Searching for ways to minimize their carbon footprints, Zac and Darin visit a self-sustaining home and other business innovating to reduce waste.

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

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

Eco-innovators introduce Zac and Darin to unique and cost-effective ways to address complex problems and help heal the environment.

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.

A hurricane slams the rehab, knocking an osprey nest out of its tree; Hope scrambles to save the babies in the middle of the storm.

From high above, a view of Niagara Falls, Lake Ontario, the Greater Toronto Area and the wonders of Thousand Islands National Park.

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

The rehab is up all night with three tiny orphans needing round-the-clock care.

Exploring the St. Lawrence Seaway from the Great Lakes to Quebec City.

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

Tools, medicine and drugs can all be found in animal societies, including chimps that throw stones and hunt with spears, elephants that use branches as fly swatters, and lemurs that get intoxicated on the secretions of millipedes.

Gregg Wallace discovers how one of Britain's largest bakeries makes up to 1.5 million loaves of bread each week; he also uncovers the secrets to baking 4,000 loaves at once.

Professor Cox explores the cycles of time that define the lives of humans.

Gordon Buchanan joins the Pazhetnovs, a pioneering family of biologists, in snowy Russia to rehabilitate six orphaned grizzly cubs back to the wild.

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.

In some natural wonders people push themselves to the limit, and survival requires skill, ingenuity and bravery.

Gregg Wallace discovers how one of Britain's largest bakeries makes up to 1.5 million loaves of bread each week; he also uncovers the secrets to baking 4,000 loaves at once.

Polar landscapes in autumn are transformed as the big freeze returns; in the Arctic, polar bears gather in large numbers on the coast to wait for the return of the ice; off the coast 2,000 beluga whales head for a special estuary.

Celebrities tackle some of the most infamous roads in the world.

Alaskans stand their ground as winter brings one final barrage.

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

Celebrities tackle some of the most infamous roads in the world.

Alaskans stand their ground as winter brings one final barrage.

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

Gregg Wallace discovers how one of Britain's largest bakeries makes up to 1.5 million loaves of bread each week; he also uncovers the secrets to baking 4,000 loaves at once.

Polar landscapes in autumn are transformed as the big freeze returns; in the Arctic, polar bears gather in large numbers on the coast to wait for the return of the ice; off the coast 2,000 beluga whales head for a special estuary.

The rainforests of Ecuador are some of the most diverse on earth. brimming with all kinds of unique and weird species that are found nowhere else, and some of the most deadly animals on earth lurking in the shadows.

Steve and the crew travel 4,000 miles to the Loango National Park in Gabon; Steve heads out into Loango's maze of rivers on a mission to try and find an animal that is critically endangered but packs a mighty punch, the western lowland gorilla.

Tools, medicine and drugs can all be found in animal societies, including chimps that throw stones and hunt with spears, elephants that use branches as fly swatters, and lemurs that get intoxicated on the secretions of millipedes.

Pondering a doe's potential as a surrogate mother and the chances that two fawns have in the ER.

Exploring the international boundary dividing the province of Quebec and the United States, from Ottawa and Montreal south.

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

Two tricky patients finally go free; 50 babies are born all at once.

From the remote border town of Pohegemanook, tracing the Quebec, Maine and New Brunswick borders ending at the open waters of the Atlantic.

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

The Spy Creatures discover how friendships are a vital part of animal societies. Spy Wolf Cub joins a pack of arctic wolves, where a real cub's survival depends on friendships in one of the harshest environments in the world.

Gregg Wallace is inside one of the world's largest chocolate factories in York to discover how they produce a staggering 7 million bars a day. He follows the incredible 24 hour journey - from bean to bar - of one of our best-selling chocolates.

The same 92 elements that exist on Earth can be found throughout the cosmos.

Celebrities tackle some of the most infamous roads in the world.

Alaskans stand their ground as winter brings one final barrage.

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

Gregg Wallace is inside one of the world's largest chocolate factories in York to discover how they produce a staggering 7 million bars a day. He follows the incredible 24 hour journey - from bean to bar - of one of our best-selling chocolates.

Winter is the greatest test for life in the polar regions; in the Arctic, a female polar bear treks into the mountains to give birth; out on the frozen ocean, the entire population of the world's spectacled eider ducks braves the winter.

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

Humans are changing our planet so rapidly, it's affecting earth's life support systems: our weather, our oceans and the living world.

Dr. Helen Czerski reveals how the harnessing of heat's power to transform matter has led to some of humanity's greatest achievements, from molten metal that enabled us to make tools to the searing heat of plasmas that offer near unlimited power.

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

Humans are changing our planet so rapidly, it's affecting earth's life support systems: our weather, our oceans and the living world.

Two brilliant physicists, Albert Einstein and Stephen Hawking have each defined humanity's understanding of the universe but their beliefs on how it works do not always align.

Gregg Wallace is inside one of the world's largest chocolate factories in York to discover how they produce a staggering 7 million bars a day. He follows the incredible 24 hour journey - from bean to bar - of one of our best-selling chocolates.

Winter is the greatest test for life in the polar regions; in the Arctic, a female polar bear treks into the mountains to give birth; out on the frozen ocean, the entire population of the world's spectacled eider ducks braves the winter.

Bonus footage from throughout the series, including a race with a cheetah, a cute but deadly bird, and a king cobra rescue; rare occasions when things do not go to plan.

Steve Backshall embarks on a mission to the steamy rainforests of Costa Rica; things get off to a breathtaking start when Steve is almost strangled by a giant boa constrictor.

The Spy Creatures discover how friendships are a vital part of animal societies. Spy Wolf Cub joins a pack of arctic wolves, where a real cub's survival depends on friendships in one of the harshest environments in the world.

Incredible rock formations, peat farms and some of the East Coast's impressive sand dunes.

Scientists explore whether Earth's estranged twin Venus could be a vision of our planet's future.

Some of the world's greatest scientists devise scenarios for destroying Earth.

Harvesting flavors of the pacific; a beachside RV and campsite, including an experimentation kitchen.

Lodging on an Agressor live aboard dive boat in Belize; freediving and beach exploration; Paul brings Ed into his culinary challenge; Ed brings Paul into his on-deck kitchen; cacao-based hot sauce.

An underwater discovery from a violent past; strange open ocean spirals off the coast of Australia; a mysterious concrete ghost island; never-seen-before tracks discovered along the seabed.

Griff uncovers what makes Newfoundland and Labrador distinctly unique, from tiny islands, sea shanties, and cods tongues, to jellybean houses and noonday canons, while discovering its "bigness" in land, dogs, and the hospitality of its people.

Gordon Buchanan joins the Pazhetnovs, a pioneering family of biologists, in snowy Russia to rehabilitate six orphaned grizzly cubs back to the wild.

A look at the extraordinary riches and wonders of the polar regions and the people that have been visiting them for thousands of years.

After being raised on the ice in winter, emperor penguin chicks find themselves abandoned by their parents in spring; to survive, they must find their own way across the treacherous sea ice to the rich waters of the Southern Ocean.

At the top of the planet lies the Arctic Ocean; after four months of winter darkness, the sun returns to reveal a frozen ocean covered in ice; mother polar bears emerge from their hillside dens and lead their cubs down to the sea ice to hunt.

Polar landscapes in autumn are transformed as the big freeze returns; in the Arctic, polar bears gather in large numbers on the coast to wait for the return of the ice; off the coast 2,000 beluga whales head for a special estuary.

Winter is the greatest test for life in the polar regions; in the Arctic, a female polar bear treks into the mountains to give birth; out on the frozen ocean, the entire population of the world's spectacled eider ducks braves the winter.

Hurricane Ike makes landfall in Galveston, Texas, causing widespread flooding.

Gregg Wallace is inside one of the world's largest chocolate factories in York to discover how they produce a staggering 7 million bars a day. He follows the incredible 24 hour journey - from bean to bar - of one of our best-selling chocolates.

Celebrities tackle some of the most infamous roads in the world.

Orphaned baby rhinos in South Africa; how the deadly predators are tracked; what can be done to save the species from being poached to extinction.

Setting sail to the island of Bali, Steve and the team are out to find the elusive ocean sunfish; these deep ocean giants feed on poisonous jellyfish and ascend to the shallows for a spa session at a cleaner fish station.

Zac and Darin test their cooking skills in Melbourne, Australia, before heading to the Torres Strait Islands to understand the impact of rising sea levels.

Celebrities tackle some of the most infamous roads in the world.

Orphaned baby rhinos in South Africa; how the deadly predators are tracked; what can be done to save the species from being poached to extinction.

Setting sail to the island of Bali, Steve and the team are out to find the elusive ocean sunfish; these deep ocean giants feed on poisonous jellyfish and ascend to the shallows for a spa session at a cleaner fish station.

Zac and Darin test their cooking skills in Melbourne, Australia, before heading to the Torres Strait Islands to understand the impact of rising sea levels.

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.

Wearing chainmail, Steve takes to the sea in search of a monster; Steve goes searching for the biggest wasp in the world.

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.

In Southern Africa, Steve braves the big waves of the Durban coast to get close to a hungry pack of blacktip sharks; the mighty black eagle; a swarm of killer bees.

Steve takes to the waters of British Columbia in search of some monsters of the deep seas; Steve encounters a fierce sea lion; a giant Pacific octopus.

In South Africa, Steve and his crew search for great white sharks.

The rainforests of Ecuador are some of the most diverse on earth. brimming with all kinds of unique and weird species that are found nowhere else, and some of the most deadly animals on earth lurking in the shadows.

Steve and the crew travel 4,000 miles to the Loango National Park in Gabon; Steve heads out into Loango's maze of rivers on a mission to try and find an animal that is critically endangered but packs a mighty punch, the western lowland gorilla.

The Magdalen Islands.

Shipwrecks in the Caribbean become artificial reefs that support marine life.

The waters near the Florida Keys are home to as many as 1,000 shipwrecks.

Les Stroud does his part to cull the lionfish population in the Caribbean Sea; a curveball ingredient and a kitchen on the beach gets Chef Paul and guest chef Vanessa Matute's creative thoughts flowing.

A look at Dr. Savannah's practice and what she's learning about Metis culture.

Reveal the truth behind the planet's oldest legends. Tour an island covered in polar bears, see bizarre twin craters in Greece, peek at a supervolcano hidden under Yellowstone Park, and examine an ocean formation that's eerily similar to Atlantis.

Griff Rhys Jones uncovers the beating heart of Canada's "Frenchness" in the province of Quebec.

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

Gregg Wallace gets exclusive access to one of the largest fresh milk processing plants on earth to see how they get milk from cow to carton in less than 24 hours. He reveals how one factory can process 2000 litres of milk in under a minute.

Gregg Wallace takes an exclusive tour of Kellogg's massive Manchester factory to discover, step-by-step, what it takes to produce a million boxes of cereal every day; Cherry Healey discovers how special nutrients are added to cereal.

Gregg Wallace follows 27 tons of potatoes from a farm in Hampshire, England, through the largest crisp factory on Earth, as they are peeled, sliced and fried to make more than five million packets of crisps every 24 hours.

Alaskans enter a new dawn in the Arctic winter.

Alaska residents labor their way through winter's challenges.

Alaskans confront the environment and themselves as winter bears down.