A Curious Twist: David Attenborough examines the narwhal's tusk and the spiral shells found on snails. S1 E4.

Hungary: Ben spends time with Julia Pryke, who left behind a comfortable life in Berkshire, England, to live in a derelict two-bedroom farmhouse in the remote Hungarian countryside. S4 E3.

Canada: Ben meets former War Correspondent Julius Strauss in a remote mountain valley lodge in Canada and finds out how he became one of North America's top grizzly bear guides. S4 E4.

Ibiza: In a secluded valley on the island of Ibiza, Ben lives in a commune with an ex-navy officer who shunned a life of wealth and excess on the high seas for a back-to-basics existence. S4 E5.

Courtship: It's time to win a mate and the stakes could not be higher. S1 E5.

False Start: Agnes and Ting retrieve a sled and tipi from Kiwalik. Glenn goes paragliding off of a mountain. Jessie deals with snow removal around camp. Andy transitions his pups to the full dog team. S5 E8.

Discovering the Americas: During the height of the Ice Age, one of the coldest times humanity has ever known, Homo sapiens steps into the last habitable continents on the planet: the Americas. S1 E4.

Mongolia: In her final journey of the series, Kate Humble travels deep into the Gobi Desert to live with an extended family of cashmere goat and yak herders. S1 E3.

Ice Worlds: Professor Brian Cox explores the solar system's ice giants, frozen moons and worlds where ice behaves in unimaginable ways. S1 E4.

Caring for Living Beings: In the Mediterranean ocean, attempts to care for offspring can be perilous. This breathtaking natural history documentary follows various creatures who risk everything to look. S1 E2.

A Curious Twist: David Attenborough examines the narwhal's tusk and the spiral shells found on snails. S1 E4.

Hungary: Ben spends time with Julia Pryke, who left behind a comfortable life in Berkshire, England, to live in a derelict two-bedroom farmhouse in the remote Hungarian countryside. S4 E3.

Canada: Ben meets former War Correspondent Julius Strauss in a remote mountain valley lodge in Canada and finds out how he became one of North America's top grizzly bear guides. S4 E4.

Ibiza: In a secluded valley on the island of Ibiza, Ben lives in a commune with an ex-navy officer who shunned a life of wealth and excess on the high seas for a back-to-basics existence. S4 E5.

False Start: Agnes and Ting retrieve a sled and tipi from Kiwalik. Glenn goes paragliding off of a mountain. Jessie deals with snow removal around camp. Andy transitions his pups to the full dog team. S5 E8.

Courtship: It's time to win a mate and the stakes could not be higher. S1 E5.

Solar Superstorms: Ferocious explosions on the surface of the Sun can release clouds of electrically charged particles containing energy equivalent to millions of nuclear bombs. S1 E2.

Breaking Point: At a chimpanzee orphanage in Liberia, a deadly cold breaks out among the babies, and the arrival of an eight-week-old infant and an adult male chimp brings new challenges. S1 E2.

Hungary: Ben spends time with Julia Pryke, who left behind a comfortable life in Berkshire, England, to live in a derelict two-bedroom farmhouse in the remote Hungarian countryside. S4 E3.

Canada: Ben meets former War Correspondent Julius Strauss in a remote mountain valley lodge in Canada and finds out how he became one of North America's top grizzly bear guides. S4 E4.

Canada: Ben meets former War Correspondent Julius Strauss in a remote mountain valley lodge in Canada and finds out how he became one of North America's top grizzly bear guides. S4 E4.

Ibiza: In a secluded valley on the island of Ibiza, Ben lives in a commune with an ex-navy officer who shunned a life of wealth and excess on the high seas for a back-to-basics existence. S4 E5.

Ibiza: In a secluded valley on the island of Ibiza, Ben lives in a commune with an ex-navy officer who shunned a life of wealth and excess on the high seas for a back-to-basics existence. S4 E5.

Caring for Living Beings: In the Mediterranean ocean, attempts to care for offspring can be perilous. This breathtaking natural history documentary follows various creatures who risk everything to look. S1 E2.

Courtship: It's time to win a mate and the stakes could not be higher. S1 E5.

False Start: Agnes and Ting retrieve a sled and tipi from Kiwalik. Glenn goes paragliding off of a mountain. Jessie deals with snow removal around camp. Andy transitions his pups to the full dog team. S5 E8.

Mongolia: In her final journey of the series, Kate Humble travels deep into the Gobi Desert to live with an extended family of cashmere goat and yak herders. S1 E3.

The Age of the Universe: In 1989, the space telescope Hipparcos focused on a single star and made an unbelievable discovery. Known as the Methuselah star, this celestial body appeared to be older than the universe S1 E3.

The Guardians of the Mediterranean: The Mediterranean and the creatures that live within it are facing many threats. Global warming, overfishing and pollution are all taking their toll. S1 E3.

Social Networkers: Chris Packham looks at social intelligence in the animal kingdom and finds out why it is that, for animals, being together means being clever. S1 E4.

Con Artists: Chris Packham reveals that deceit is rife in the natural world - from cunning masters of disguise and sneaky thieves, to kidnapping otters and even femme fatale fireflies. S1 E5.

Travellers: By getting up close and personal with some of nature's best travellers, Chris Packham reveals the remarkable intelligence these Animal Einsteins use to journey around our planet. S1 E6.

Parenthood: Offspring are the next best thing to immortality. Parents take great risks to raise them. S1 E6.

Homecoming: As winter fades across the arctic, spring arrives bringing rising temperatures and mounting challenges for remote Alaskans. S5 E1.

Thailand: Ben meets Niall, who rescues and cares for street dogs in Koh Samui. S10 E10.

Episode 3: In the jungles of Phu Khieo live some unusual primates. S1 E3.

Summer: The North has constant sun, the south is in constant darkness. However, things aren't that simple. This is a season of feast, famine, and fire. S1 E3.

The Guardians of the Mediterranean: The Mediterranean and the creatures that live within it are facing many threats. Global warming, overfishing and pollution are all taking their toll. S1 E3.

Social Networkers: Chris Packham looks at social intelligence in the animal kingdom and finds out why it is that, for animals, being together means being clever. S1 E4.

Con Artists: Chris Packham reveals that deceit is rife in the natural world - from cunning masters of disguise and sneaky thieves, to kidnapping otters and even femme fatale fireflies. S1 E5.

Travellers: By getting up close and personal with some of nature's best travellers, Chris Packham reveals the remarkable intelligence these Animal Einsteins use to journey around our planet. S1 E6.

Homecoming: As winter fades across the arctic, spring arrives bringing rising temperatures and mounting challenges for remote Alaskans. S5 E1.

Parenthood: Offspring are the next best thing to immortality. Parents take great risks to raise them. S1 E6.

The Age of the Universe: In 1989, the space telescope Hipparcos focused on a single star and made an unbelievable discovery. Known as the Methuselah star, this celestial body appeared to be older than the universe S1 E3.

Episode 1: Steve takes us into the dangerous world of crocodiles - one of nature's most fearsome predators - entering croc-infested territory escorted by an armed safari guide. S1 E1.

Social Networkers: Chris Packham looks at social intelligence in the animal kingdom and finds out why it is that, for animals, being together means being clever. S1 E4.

Con Artists: Chris Packham reveals that deceit is rife in the natural world - from cunning masters of disguise and sneaky thieves, to kidnapping otters and even femme fatale fireflies. S1 E5.

Travellers: By getting up close and personal with some of nature's best travellers, Chris Packham reveals the remarkable intelligence these Animal Einsteins use to journey around our planet. S1 E6.

The Guardians of the Mediterranean: The Mediterranean and the creatures that live within it are facing many threats. Global warming, overfishing and pollution are all taking their toll. S1 E3.

Parenthood: Offspring are the next best thing to immortality. Parents take great risks to raise them. S1 E6.

Homecoming: As winter fades across the arctic, spring arrives bringing rising temperatures and mounting challenges for remote Alaskans. S5 E1.

Thailand: Ben meets Niall, who rescues and cares for street dogs in Koh Samui. S10 E10.

Tutankhamun's Space Dagger: A dagger entombed alongside the mummy of Egyptian pharaoh Tutankhamun was made with iron that came from a meteorite, . The weapon was one of a pair of daggers discovered in 1925. S1 E4.

Becoming An Adult: Under the care of their mothers, many Mediterranean animals enjoy a certain amount of protection. But the move to adulthood can be fraught with danger. S1 E4.

Seeing the Pattern: David Attenborough examines a zebra's stripes and the wings of a butterfly. S1 E5.

Episode 10: Inspector Clare Wilson responds to a report of a house full of dogs, apparently in need of help. S6 E10.

Episode 11: Inspector Lyndsey Taylor gets down and dirty as she rescues 4 dogs from a squalid house. S6 E11.

Episode 12: Inspector Lyndsey Taylor continues to investigate the case of 4 dogs rescued from squalor. S6 E12.

Chimpanzee: In Senegal, West Africa, live a group of chimpanzees, led by an alpha male named David. He has already been alpha for 3 years - a time when leaders here are usually overthrown. S1 E1.

New Territory: During the Arctic spring, Alaskans take advantage of the warm weather and 24-hour daylight to complete tasks that are impossible in the winter months. S5 E2.

Strange Worlds: Professor Brian Cox explores the solar system's misfits and oddballs and investigates the forces that sculpted the bizarre features on these strange worlds. S1 E5.

Discovering the Americas: During the height of the Ice Age, one of the coldest times humanity has ever known, Homo sapiens steps into the last habitable continents on the planet: the Americas. S1 E4.

Mongolia: In her final journey of the series, Kate Humble travels deep into the Gobi Desert to live with an extended family of cashmere goat and yak herders. S1 E3.

Becoming An Adult: Under the care of their mothers, many Mediterranean animals enjoy a certain amount of protection. But the move to adulthood can be fraught with danger. S1 E4.

Seeing the Pattern: David Attenborough examines a zebra's stripes and the wings of a butterfly. S1 E5.

Episode 10: Inspector Clare Wilson responds to a report of a house full of dogs, apparently in need of help. S6 E10.

Episode 11: Inspector Lyndsey Taylor gets down and dirty as she rescues 4 dogs from a squalid house. S6 E11.

Episode 12: Inspector Lyndsey Taylor continues to investigate the case of 4 dogs rescued from squalor. S6 E12.

New Territory: During the Arctic spring, Alaskans take advantage of the warm weather and 24-hour daylight to complete tasks that are impossible in the winter months. S5 E2.

Chimpanzee: In Senegal, West Africa, live a group of chimpanzees, led by an alpha male named David. He has already been alpha for 3 years - a time when leaders here are usually overthrown. S1 E1.

Tutankhamun's Space Dagger: A dagger entombed alongside the mummy of Egyptian pharaoh Tutankhamun was made with iron that came from a meteorite, . The weapon was one of a pair of daggers discovered in 1925. S1 E4.

Summer: The North has constant sun, the south is in constant darkness. However, things aren't that simple. This is a season of feast, famine, and fire. S1 E3.

Episode 10: Inspector Clare Wilson responds to a report of a house full of dogs, apparently in need of help. S6 E10.

Episode 11: Inspector Lyndsey Taylor gets down and dirty as she rescues 4 dogs from a squalid house. S6 E11.

Episode 11: Inspector Lyndsey Taylor gets down and dirty as she rescues 4 dogs from a squalid house. S6 E11.

Episode 12: Inspector Lyndsey Taylor continues to investigate the case of 4 dogs rescued from squalor. S6 E12.

Episode 12: Inspector Lyndsey Taylor continues to investigate the case of 4 dogs rescued from squalor. S6 E12.

Becoming An Adult: Under the care of their mothers, many Mediterranean animals enjoy a certain amount of protection. But the move to adulthood can be fraught with danger. S1 E4.

Becoming An Adult: Under the care of their mothers, many Mediterranean animals enjoy a certain amount of protection. But the move to adulthood can be fraught with danger. S1 E4.

Chimpanzee: In Senegal, West Africa, live a group of chimpanzees, led by an alpha male named David. He has already been alpha for 3 years - a time when leaders here are usually overthrown. S1 E1.

Chimpanzee: In Senegal, West Africa, live a group of chimpanzees, led by an alpha male named David. He has already been alpha for 3 years - a time when leaders here are usually overthrown. S1 E1.

New Territory: During the Arctic spring, Alaskans take advantage of the warm weather and 24-hour daylight to complete tasks that are impossible in the winter months. S5 E2.

Episode 3: In the jungles of Phu Khieo live some unusual primates. S1 E3.

Strange Worlds: Professor Brian Cox explores the solar system's misfits and oddballs and investigates the forces that sculpted the bizarre features on these strange worlds. S1 E5.

Strange Worlds: Professor Brian Cox explores the solar system's misfits and oddballs and investigates the forces that sculpted the bizarre features on these strange worlds. S1 E5.

Is There Life on Mars?: In 1996, the scientific community was rocked by the discovery of a meteorite. The object appeared to come from Mars and researchers claimed there were traces of fossils inside. S1 E5.

Is There Life on Mars?: In 1996, the scientific community was rocked by the discovery of a meteorite. The object appeared to come from Mars and researchers claimed there were traces of fossils inside. S1 E5.

Old Age and Rebirth: For some of the animals that live in the Mediterranean region, reaching old age can result in a death sentence. This astonishing natural history documentary follows the progress of an aging . S1 E5.

Old Age and Rebirth: For some of the animals that live in the Mediterranean region, reaching old age can result in a death sentence. This astonishing natural history documentary follows the progress of an aging . S1 E5.

Renegades of the Arctic: Jessie Holmes, Erik and Martha Salitan struggle to survive in the Alaskan Wilderness. S1 E5.

Renegades of the Arctic: Jessie Holmes, Erik and Martha Salitan struggle to survive in the Alaskan Wilderness. S1 E5.

Unfamiliar Territory: To prepare for dark winter in the Arctic, Alaskans must hunt, fish, and overcome challenges as they travel through unfamiliar territories. S5 E1.

Howl of the Wild: To ensure their survival for the upcoming winter, Alaskans must head out into the fray. S5 E2.

Emperor: Emperor penguins battle for survival against the worst winter in the world. Working together can they protect and feed their chicks till they reach adulthood? S1 E2.

Facing Fears: A brief window of opportunity opens for Alaskans to make their lives easier when winter returns. S5 E3.

A New Beginning: At Liberia's only home for rescued chimpanzees, new arrivals keep flooding in. Jimmy and Jenny Desmond and their team are now at breaking point. S1 E3.

Snowball: A look at how the giant supercontinent Rodinia broke up 800 million years ago. Earth's tectonic forces ripped the land apart, kicking off a series of events that sent temperatures plummeting. S1 E2.

Thailand: Ben meets Niall, who rescues and cares for street dogs in Koh Samui. S10 E10.

Old Age and Rebirth: For some of the animals that live in the Mediterranean region, reaching old age can result in a death sentence. This astonishing natural history documentary follows the progress of an aging . S1 E5.

Renegades of the Arctic: Jessie Holmes, Erik and Martha Salitan struggle to survive in the Alaskan Wilderness. S1 E5.

Unfamiliar Territory: To prepare for dark winter in the Arctic, Alaskans must hunt, fish, and overcome challenges as they travel through unfamiliar territories. S5 E1.

Howl of the Wild: To ensure their survival for the upcoming winter, Alaskans must head out into the fray. S5 E2.

Facing Fears: A brief window of opportunity opens for Alaskans to make their lives easier when winter returns. S5 E3.

Emperor: Emperor penguins battle for survival against the worst winter in the world. Working together can they protect and feed their chicks till they reach adulthood? S1 E2.

Episode 2: More dramatic than any work of fiction, the world of growing families, power struggles and feuding rivals, is back. Watch as animals strive to create dynasties fit to rule for generations. S1 E2.

Is There Life on Mars?: In 1996, the scientific community was rocked by the discovery of a meteorite. The object appeared to come from Mars and researchers claimed there were traces of fossils inside. S1 E5.

The Odyssey for New Life: A young sperm whale, a monk seal, a loggerhead sea turtle, a family of storks, a Dragonera lizard and an island cat are only some of the main characters in the Mediterranean world. S1 E1.

Caring for Living Beings: In the Mediterranean ocean, attempts to care for offspring can be perilous. This breathtaking natural history documentary follows various creatures who risk everything to look. S1 E2.

The Guardians of the Mediterranean: The Mediterranean and the creatures that live within it are facing many threats. Global warming, overfishing and pollution are all taking their toll. S1 E3.

Becoming An Adult: Under the care of their mothers, many Mediterranean animals enjoy a certain amount of protection. But the move to adulthood can be fraught with danger. S1 E4.

Old Age and Rebirth: For some of the animals that live in the Mediterranean region, reaching old age can result in a death sentence. This astonishing natural history documentary follows the progress of an aging . S1 E5.

Renegades of the Arctic: Jessie Holmes, Erik and Martha Salitan struggle to survive in the Alaskan Wilderness. S1 E5.

Unfamiliar Territory: To prepare for dark winter in the Arctic, Alaskans must hunt, fish, and overcome challenges as they travel through unfamiliar territories. S5 E1.

Unfamiliar Territory: To prepare for dark winter in the Arctic, Alaskans must hunt, fish, and overcome challenges as they travel through unfamiliar territories. S5 E1.

Howl of the Wild: To ensure their survival for the upcoming winter, Alaskans must head out into the fray. S5 E2.

Howl of the Wild: To ensure their survival for the upcoming winter, Alaskans must head out into the fray. S5 E2.

Til We Meet Again: Joan is rushed to Queen's Medical Centre after falling on a moving tram, Rose has been thrown into the air by a car and in 13 year old Prince has broken his leg in three places playing football. S18 E14.

Til We Meet Again: Joan is rushed to Queen's Medical Centre after falling on a moving tram, Rose has been thrown into the air by a car and in 13 year old Prince has broken his leg in three places playing football. S18 E14.

I Got You: Best friends Dean and Nahum arrive by ambulance following a serious car crash and 94 year old Pearl is in the minors' clinic after trapping her arm in a lift. S18 E15.

I Got You: Best friends Dean and Nahum arrive by ambulance following a serious car crash and 94 year old Pearl is in the minors' clinic after trapping her arm in a lift. S18 E15.

It's My Life: Following patients who are treated in the same 24-hour period at St George's in south-west London, one of the UK's busiest accident and emergency departments. S18 E16.

Social Networkers: Chris Packham looks at social intelligence in the animal kingdom and finds out why it is that, for animals, being together means being clever. S1 E4.

Con Artists: Chris Packham reveals that deceit is rife in the natural world - from cunning masters of disguise and sneaky thieves, to kidnapping otters and even femme fatale fireflies. S1 E5.

Travellers: By getting up close and personal with some of nature's best travellers, Chris Packham reveals the remarkable intelligence these Animal Einsteins use to journey around our planet. S1 E6.

Episode 1: In Canada, a tiny turtle ventures through a forest of giants in search of the wetland, and in South Africa, a bushbaby is drawn towards a world of light in his quest to find a home. S1 E1.

Human: How dramatic twists in Earth's story enabled humans to go from being part of nature to controlling it, and what can be learnt from this tale before it's too late. S1 E5.

Strange Worlds: Professor Brian Cox explores the solar system's misfits and oddballs and investigates the forces that sculpted the bizarre features on these strange worlds. S1 E5.

Mongolia: In her final journey of the series, Kate Humble travels deep into the Gobi Desert to live with an extended family of cashmere goat and yak herders. S1 E3.

Episode 3: In the jungles of Phu Khieo live some unusual primates. S1 E3.

Summer: The North has constant sun, the south is in constant darkness. However, things aren't that simple. This is a season of feast, famine, and fire. S1 E3.

False Start: Agnes and Ting retrieve a sled and tipi from Kiwalik. Glenn goes paragliding off of a mountain. Jessie deals with snow removal around camp. Andy transitions his pups to the full dog team. S5 E8.

Homecoming: As winter fades across the arctic, spring arrives bringing rising temperatures and mounting challenges for remote Alaskans. S5 E1.

New Territory: During the Arctic spring, Alaskans take advantage of the warm weather and 24-hour daylight to complete tasks that are impossible in the winter months. S5 E2.

Facing Fears: A brief window of opportunity opens for Alaskans to make their lives easier when winter returns. S5 E3.

The Far Side of the Moon: In 1959, a Russian space probe took the first ever surprising images of the far side of the Moon. This episode follows three different theories attempting to make sense of it. S1 E1.

Solar Superstorms: Ferocious explosions on the surface of the Sun can release clouds of electrically charged particles containing energy equivalent to millions of nuclear bombs. S1 E2.

The Age of the Universe: In 1989, the space telescope Hipparcos focused on a single star and made an unbelievable discovery. Known as the Methuselah star, this celestial body appeared to be older than the universe S1 E3.

Tutankhamun's Space Dagger: A dagger entombed alongside the mummy of Egyptian pharaoh Tutankhamun was made with iron that came from a meteorite, . The weapon was one of a pair of daggers discovered in 1925. S1 E4.

Episode 1: In Canada, a tiny turtle ventures through a forest of giants in search of the wetland, and in South Africa, a bushbaby is drawn towards a world of light in his quest to find a home. S1 E1.

A New Beginning: At Liberia's only home for rescued chimpanzees, new arrivals keep flooding in. Jimmy and Jenny Desmond and their team are now at breaking point. S1 E3.

Hungary: Ben spends time with Julia Pryke, who left behind a comfortable life in Berkshire, England, to live in a derelict two-bedroom farmhouse in the remote Hungarian countryside. S4 E3.

Canada: Ben meets former War Correspondent Julius Strauss in a remote mountain valley lodge in Canada and finds out how he became one of North America's top grizzly bear guides. S4 E4.

Ibiza: In a secluded valley on the island of Ibiza, Ben lives in a commune with an ex-navy officer who shunned a life of wealth and excess on the high seas for a back-to-basics existence. S4 E5.

Episode 10: Inspector Clare Wilson responds to a report of a house full of dogs, apparently in need of help. S6 E10.

Episode 11: Inspector Lyndsey Taylor gets down and dirty as she rescues 4 dogs from a squalid house. S6 E11.

Episode 12: Inspector Lyndsey Taylor continues to investigate the case of 4 dogs rescued from squalor. S6 E12.

Is There Life on Mars?: In 1996, the scientific community was rocked by the discovery of a meteorite. The object appeared to come from Mars and researchers claimed there were traces of fossils inside. S1 E5.

Human: How dramatic twists in Earth's story enabled humans to go from being part of nature to controlling it, and what can be learnt from this tale before it's too late. S1 E5.

Episode 3: In the jungles of Phu Khieo live some unusual primates. S1 E3.

Discovering the Americas: During the height of the Ice Age, one of the coldest times humanity has ever known, Homo sapiens steps into the last habitable continents on the planet: the Americas. S1 E4.

Power: To gain power an animal must find a way to rise through the ranks of its society. S1 E4.

Courtship: It's time to win a mate and the stakes could not be higher. S1 E5.

Parenthood: Offspring are the next best thing to immortality. Parents take great risks to raise them. S1 E6.

Chimpanzee: In Senegal, West Africa, live a group of chimpanzees, led by an alpha male named David. He has already been alpha for 3 years - a time when leaders here are usually overthrown. S1 E1.

Emperor: Emperor penguins battle for survival against the worst winter in the world. Working together can they protect and feed their chicks till they reach adulthood? S1 E2.

Til We Meet Again: Joan is rushed to Queen's Medical Centre after falling on a moving tram, Rose has been thrown into the air by a car and in 13 year old Prince has broken his leg in three places playing football. S18 E14.

I Got You: Best friends Dean and Nahum arrive by ambulance following a serious car crash and 94 year old Pearl is in the minors' clinic after trapping her arm in a lift. S18 E15.

It's My Life: Following patients who are treated in the same 24-hour period at St George's in south-west London, one of the UK's busiest accident and emergency departments. S18 E16.

Episode 3: In the jungles of Phu Khieo live some unusual primates. S1 E3.

Renegades of the Arctic: Jessie Holmes, Erik and Martha Salitan struggle to survive in the Alaskan Wilderness. S1 E5.

Unfamiliar Territory: To prepare for dark winter in the Arctic, Alaskans must hunt, fish, and overcome challenges as they travel through unfamiliar territories. S5 E1.

Howl of the Wild: To ensure their survival for the upcoming winter, Alaskans must head out into the fray. S5 E2.

Old Age and Rebirth: For some of the animals that live in the Mediterranean region, reaching old age can result in a death sentence. This astonishing natural history documentary follows the progress of an aging . S1 E5.

Emperor: Emperor penguins battle for survival against the worst winter in the world. Working together can they protect and feed their chicks till they reach adulthood? S1 E2.

Human: How dramatic twists in Earth's story enabled humans to go from being part of nature to controlling it, and what can be learnt from this tale before it's too late. S1 E5.

A New Beginning: At Liberia's only home for rescued chimpanzees, new arrivals keep flooding in. Jimmy and Jenny Desmond and their team are now at breaking point. S1 E3.

Why Do We Exist?:Our existence doesn't really make sense.When the universe was created, matter and a substance called antimatter should have obliterated each other. But that didn't happen. Can scientists unravel why? S1 E6.

Episode 1: An epic dinosaur mystery. Why do so many iconic Jurassic beasts lie buried in this unforgiving corner of Wyoming desert? S1 E1.

The Fighter: Staff at Queen's Medical Centre treat Kaeden, who has been battling a childhood illness. Steve is being treated after falling from his motorbike and Paul has partially amputated his thumb at work. S18 E17.

Family Values: Following patients who are treated in the same 24-hour period at St George's in south-west London, one of the UK's busiest accident and emergency departments. S18 E18.

Husbands And Wives: Mick is rushed to Queen's Medical Centre with suspected sepsis. Meanwhile, Keith arrives in resus with one of the highest heart rates the department has seen and Jillian is in Minors after a fall. S18 E19.

Lion: The leader of a once mighty lion pride must now battle for their very survival. Can this extraordinary lioness save her family from disaster? S1 E3.

A Great Gamble: Around 12,000 years ago, as the Ice Age finally thawed, humanity made a dramatic shift - abandoning nomadic life for permanent settlements. S1 E5.

Autumn: An explosion of colour signals that times are changing, but with winter fast approaching, preparedness is key. S1 E4.

Episode 2: Steve tries to find out if monster crocodiles can still thrive in the Reserve, and encounters five-metre-long Henry. But will he finally find the monster croc he's been searching for? S1 E2.

A Great Gamble: Around 12,000 years ago, as the Ice Age finally thawed, humanity made a dramatic shift - abandoning nomadic life for permanent settlements. S1 E5.

Episode 1: An epic dinosaur mystery. Why do so many iconic Jurassic beasts lie buried in this unforgiving corner of Wyoming desert? S1 E1.

The Fighter: Staff at Queen's Medical Centre treat Kaeden, who has been battling a childhood illness. Steve is being treated after falling from his motorbike and Paul has partially amputated his thumb at work. S18 E17.

Family Values: Following patients who are treated in the same 24-hour period at St George's in south-west London, one of the UK's busiest accident and emergency departments. S18 E18.

Husbands And Wives: Mick is rushed to Queen's Medical Centre with suspected sepsis. Meanwhile, Keith arrives in resus with one of the highest heart rates the department has seen and Jillian is in Minors after a fall. S18 E19.

Episode 2: Steve tries to find out if monster crocodiles can still thrive in the Reserve, and encounters five-metre-long Henry. But will he finally find the monster croc he's been searching for? S1 E2.

Lion: The leader of a once mighty lion pride must now battle for their very survival. Can this extraordinary lioness save her family from disaster? S1 E3.

Why Do We Exist?:Our existence doesn't really make sense.When the universe was created, matter and a substance called antimatter should have obliterated each other. But that didn't happen. Can scientists unravel why? S1 E6.

Human: How dramatic twists in Earth's story enabled humans to go from being part of nature to controlling it, and what can be learnt from this tale before it's too late. S1 E5.

The Fighter: Staff at Queen's Medical Centre treat Kaeden, who has been battling a childhood illness. Steve is being treated after falling from his motorbike and Paul has partially amputated his thumb at work. S18 E17.

Family Values: Following patients who are treated in the same 24-hour period at St George's in south-west London, one of the UK's busiest accident and emergency departments. S18 E18.

Husbands And Wives: Mick is rushed to Queen's Medical Centre with suspected sepsis. Meanwhile, Keith arrives in resus with one of the highest heart rates the department has seen and Jillian is in Minors after a fall. S18 E19.

Episode 1: An epic dinosaur mystery. Why do so many iconic Jurassic beasts lie buried in this unforgiving corner of Wyoming desert? S1 E1.

Lion: The leader of a once mighty lion pride must now battle for their very survival. Can this extraordinary lioness save her family from disaster? S1 E3.

Facing Fears: A brief window of opportunity opens for Alaskans to make their lives easier when winter returns. S5 E3.

Autumn: An explosion of colour signals that times are changing, but with winter fast approaching, preparedness is key. S1 E4.

The Wonder Material: Ben Garrod shows how bone can support animals that are both minuscule and massive. S1 E1.

Episode 2: The plot thickens. As the team uncovers the remains of fearsome Jurassic predators, they consider the possibility that the site was a dinosaur hunting ground. S1 E2.

Armoured Animals: David Attenborough looks at the formidable armour of hedgehogs and rhinos. S2 E2.

Mongolia: Ben ventures deep into the freezing tundra of Outer Mongolia to meet a couple who left their comfortable life in America to become missionaries in this remote corner of the world. S4 E6.

North Carolina: Ben heads to a secret location in the USA's Appalachian Mountains to live with forest dweller Tod Kershaw, a former engineer whose wild tribe must scavenge other people's waste to stay alive. S4 E7.

Morocco: Ben travels to the Atlas Mountains in Morocco to meet a couple who shunned the American dream to live in a remote mud house, but times are tough and they're running out of money and food. S4 E8.

Painted Wolf: The leader of a great Painted Wolf family is growing old. Her power to keep the peace is waning. A feud with an ambitious daughter threatens to bring the dynasty down. S1 E4.

To Catch A King: Throughout the summer, Alaskans work tirelessly to prepare for the long winter ahead. S5 E4.

A Great Gamble: Around 12,000 years ago, as the Ice Age finally thawed, humanity made a dramatic shift - abandoning nomadic life for permanent settlements. S1 E5.

Episode 1: From flying boats to drug busts, Simon explores both the light and dark sides of the Dominican Republic. S1 E1.

Strange Worlds: Professor Brian Cox explores the solar system's misfits and oddballs and investigates the forces that sculpted the bizarre features on these strange worlds. S1 E5.

Episode 2: The plot thickens. As the team uncovers the remains of fearsome Jurassic predators, they consider the possibility that the site was a dinosaur hunting ground. S1 E2.

Mongolia: Ben ventures deep into the freezing tundra of Outer Mongolia to meet a couple who left their comfortable life in America to become missionaries in this remote corner of the world. S4 E6.

North Carolina: Ben heads to a secret location in the USA's Appalachian Mountains to live with forest dweller Tod Kershaw, a former engineer whose wild tribe must scavenge other people's waste to stay alive. S4 E7.

Morocco: Ben travels to the Atlas Mountains in Morocco to meet a couple who shunned the American dream to live in a remote mud house, but times are tough and they're running out of money and food. S4 E8.

To Catch A King: Throughout the summer, Alaskans work tirelessly to prepare for the long winter ahead. S5 E4.

Painted Wolf: The leader of a great Painted Wolf family is growing old. Her power to keep the peace is waning. A feud with an ambitious daughter threatens to bring the dynasty down. S1 E4.

The Wonder Material: Ben Garrod shows how bone can support animals that are both minuscule and massive. S1 E1.

Episode 2: Steve tries to find out if monster crocodiles can still thrive in the Reserve, and encounters five-metre-long Henry. But will he finally find the monster croc he's been searching for? S1 E2.

Mongolia: Ben ventures deep into the freezing tundra of Outer Mongolia to meet a couple who left their comfortable life in America to become missionaries in this remote corner of the world. S4 E6.

North Carolina: Ben heads to a secret location in the USA's Appalachian Mountains to live with forest dweller Tod Kershaw, a former engineer whose wild tribe must scavenge other people's waste to stay alive. S4 E7.

Morocco: Ben travels to the Atlas Mountains in Morocco to meet a couple who shunned the American dream to live in a remote mud house, but times are tough and they're running out of money and food. S4 E8.

Episode 2: The plot thickens. As the team uncovers the remains of fearsome Jurassic predators, they consider the possibility that the site was a dinosaur hunting ground. S1 E2.

Painted Wolf: The leader of a great Painted Wolf family is growing old. Her power to keep the peace is waning. A feud with an ambitious daughter threatens to bring the dynasty down. S1 E4.

To Catch A King: Throughout the summer, Alaskans work tirelessly to prepare for the long winter ahead. S5 E4.

Episode 1: From flying boats to drug busts, Simon explores both the light and dark sides of the Dominican Republic. S1 E1.

On The Move: Ben Garrod discovers how the skeleton has adapted for vertebrates to move on land. S1 E2.

Refuge: All our animal families make the most of the good times when a new oasis brings untold riches. But they face devastation when a towering inferno takes over. Will anyone survive? S3 E1.

Life in the Dark: David Attenborough examines the huge eyes of the dark-dwelling owl and giant squid. S2 E3.

Meet the Family: One family, 37 faces: from the Arctic wolf to the talkative dhole, the tiny fennec fox to the long-legged maned wolf, this is the definitive celebration of dogs in the wild. S1 E1.

Secrets of Success: The secrets of canid success and their incredible strategies for survival, from leaping jackals to sneezing African wild dogs, and gray foxes that climb trees. S1 E2.

Defending Wild Dogs: The people going to extraordinary lengths to understand and protect canids, from preventing wild dogs dying of grief in South Africa to protecting the tiny Darwin's fox. S1 E3.

Tiger: A tigress, Raj Bhera, has 4 new cubs. She must protect them while battling rivals who want to steal her lands and overthrow her. Will she hold on and raise her cubs to adulthood? S1 E5.

The Intruder: With the Arctic summer in full swing, and Alaskans must take advantage of the endless sunlight to harvest the season's resources, or their winter preparation is at stake. S5 E5.

Lincolnshire: Ben heads to northern England and stays with host Paul in Lincolnshire onboard his 30-year-old converted military truck. He discovers why Paul traded living in a house for life on the road. S10 E11.

Episode 1: Isolated since the time of the dinosaurs, New Zealand's wildlife has been left to its own devices - with surprising consequences. S1 E1.

Autumn: An explosion of colour signals that times are changing, but with winter fast approaching, preparedness is key. S1 E4.

Refuge: All our animal families make the most of the good times when a new oasis brings untold riches. But they face devastation when a towering inferno takes over. Will anyone survive? S3 E1.

Life in the Dark: David Attenborough examines the huge eyes of the dark-dwelling owl and giant squid. S2 E3.

Meet the Family: One family, 37 faces: from the Arctic wolf to the talkative dhole, the tiny fennec fox to the long-legged maned wolf, this is the definitive celebration of dogs in the wild. S1 E1.

Secrets of Success: The secrets of canid success and their incredible strategies for survival, from leaping jackals to sneezing African wild dogs, and gray foxes that climb trees. S1 E2.

Defending Wild Dogs: The people going to extraordinary lengths to understand and protect canids, from preventing wild dogs dying of grief in South Africa to protecting the tiny Darwin's fox. S1 E3.

The Intruder: With the Arctic summer in full swing, and Alaskans must take advantage of the endless sunlight to harvest the season's resources, or their winter preparation is at stake. S5 E5.

Tiger: A tigress, Raj Bhera, has 4 new cubs. She must protect them while battling rivals who want to steal her lands and overthrow her. Will she hold on and raise her cubs to adulthood? S1 E5.

On The Move: Ben Garrod discovers how the skeleton has adapted for vertebrates to move on land. S1 E2.

Episode 1: In Canada, a tiny turtle ventures through a forest of giants in search of the wetland, and in South Africa, a bushbaby is drawn towards a world of light in his quest to find a home. S1 E1.

Meet the Family: One family, 37 faces: from the Arctic wolf to the talkative dhole, the tiny fennec fox to the long-legged maned wolf, this is the definitive celebration of dogs in the wild. S1 E1.

Secrets of Success: The secrets of canid success and their incredible strategies for survival, from leaping jackals to sneezing African wild dogs, and gray foxes that climb trees. S1 E2.

Defending Wild Dogs: The people going to extraordinary lengths to understand and protect canids, from preventing wild dogs dying of grief in South Africa to protecting the tiny Darwin's fox. S1 E3.

Refuge: All our animal families make the most of the good times when a new oasis brings untold riches. But they face devastation when a towering inferno takes over. Will anyone survive? S3 E1.

Tiger: A tigress, Raj Bhera, has 4 new cubs. She must protect them while battling rivals who want to steal her lands and overthrow her. Will she hold on and raise her cubs to adulthood? S1 E5.

The Intruder: With the Arctic summer in full swing, and Alaskans must take advantage of the endless sunlight to harvest the season's resources, or their winter preparation is at stake. S5 E5.

Lincolnshire: Ben heads to northern England and stays with host Paul in Lincolnshire onboard his 30-year-old converted military truck. He discovers why Paul traded living in a house for life on the road. S10 E11.

Food For Thought: Ben Garrod delves into the surprising ways in which bone has evolved to help vertebrates locate, capture and devour their food. S1 E3.

Inferno: In the second programme, more extraordinary events unfold. In the aftermath of the great fire, our animal characters struggle to survive in an unrecognisable and inhospitable land. S3 E2.

Episode 1: Join us at the Dog Rescuers house as host Alan Davies throws the ultimate Christmas party for his doggy friends. S4 E1.

Episode 2: Underweight, and heavily pregnant; Lilly the Staffy urgently needs Inspector Lyndsey Taylor help. S4 E2.

Episode 3: A man who is about to be made homeless puts his dog's needs before his own. S4 E3.

Arriving: The first programme in Sir David Attenborough's celebrated series looks at how animals employ an extraordinary variety of techniques to disperse their offspring. S1 E1.

Heavy Load: As winter fades across the arctic, spring arrives bringing rising temperatures and mounting challenges for remote Alaskans. S5 E6.

Episode 1: In Canada, a tiny turtle ventures through a forest of giants in search of the wetland, and in South Africa, a bushbaby is drawn towards a world of light in his quest to find a home. S1 E1.

A Great Gamble: Around 12,000 years ago, as the Ice Age finally thawed, humanity made a dramatic shift - abandoning nomadic life for permanent settlements. S1 E5.

Episode 1: From flying boats to drug busts, Simon explores both the light and dark sides of the Dominican Republic. S1 E1.

Inferno: In the second programme, more extraordinary events unfold. In the aftermath of the great fire, our animal characters struggle to survive in an unrecognisable and inhospitable land. S3 E2.

Episode 1: Join us at the Dog Rescuers house as host Alan Davies throws the ultimate Christmas party for his doggy friends. S4 E1.

Episode 2: Underweight, and heavily pregnant; Lilly the Staffy urgently needs Inspector Lyndsey Taylor help. S4 E2.

Episode 3: A man who is about to be made homeless puts his dog's needs before his own. S4 E3.

Heavy Load: As winter fades across the arctic, spring arrives bringing rising temperatures and mounting challenges for remote Alaskans. S5 E6.

Arriving: The first programme in Sir David Attenborough's celebrated series looks at how animals employ an extraordinary variety of techniques to disperse their offspring. S1 E1.

Food For Thought: Ben Garrod delves into the surprising ways in which bone has evolved to help vertebrates locate, capture and devour their food. S1 E3.

Strange Worlds: Professor Brian Cox explores the solar system's misfits and oddballs and investigates the forces that sculpted the bizarre features on these strange worlds. S1 E5.

Episode 1: Join us at the Dog Rescuers house as host Alan Davies throws the ultimate Christmas party for his doggy friends. S4 E1.

Episode 2: Underweight, and heavily pregnant; Lilly the Staffy urgently needs Inspector Lyndsey Taylor help. S4 E2.

Episode 3: A man who is about to be made homeless puts his dog's needs before his own. S4 E3.

Inferno: In the second programme, more extraordinary events unfold. In the aftermath of the great fire, our animal characters struggle to survive in an unrecognisable and inhospitable land. S3 E2.

Arriving: The first programme in Sir David Attenborough's celebrated series looks at how animals employ an extraordinary variety of techniques to disperse their offspring. S1 E1.