The remarkable stories of some of the extraordinary people who make their homes in the Arctic, the harshest environment on Earth. Show more

Film exploring the ways in which people survive at extreme altitudes where nature becomes utterly unforgiving, from lush cloud forests to bare summits. Show more

Rivers provide food and water, but they can also flood or freeze. Human Planet meets people for whom rivers can be both a risk to life and a lifeline. Show more

A look at the one environment made by humans for humans - the city. It is built to keep untamed nature out, but nature cannot be pushed away. Show more

Humans have always found ways to live an almost aquatic life so they can exploit the sea's riches. This journey reveals tales of ingenuity and bravery. Show more

Series examining man's survival in extreme environments. A look at life in the rainforest, which requires great skill, ingenuity and sheer bravery. Show more

Documentary featuring the remarkable people who live in the world's grasslands, exploring their relationship with the natural world around them. Show more

Chris Packham and Liz Bonnin battle it out to find out whether cats or dogs are the better animal. The final round looks at whether cats and dogs really love us. Show more

Presented by Dame Sian Phillips, this episode looks at some of the biggest challenges and issues facing the marine environment in Wales and the rest of the world today. Show more

As the water starts to warm in the summer, marine giants arrive at the Celtic deep. Some have travelled for thousands of miles to feast on plankton and abundant shoals of fish. Show more

We follow Atlantic grey seals through the year, from courtship to pregnancy and birth. Will a curious snowy-white seal pup make it safely through to adulthood? Show more

The strange environment of the shallow seas is one that sits remarkably close to shore. In the giant kelp forest, we join a female catshark as she lays an egg deep in the forest floor. Show more

Following the Scharer family, the new wardens of Bardsey, a remote island off north west Wales. Arriving alone and totally isolated, they immediately face many challenges. Show more

Chris Packham and Liz Bonnin battle it out to find out whether cats or dogs are the better animal. Round one tests whether either species can understand numbers. Show more

Series in which Matthew Pritchard tries to show that a vegan diet benefits everyone. He prepares cakes for the Glamorgan federation of the WI at the annual Gower agricultural show. Show more

Series in which Matthew Pritchard tries to show that a vegan diet benefits everyone. Matt battles his claustrophobia to complete an epic challenge set by a cave rescue team. Show more

Richard Parks cycles from the Brecon Beacons to the summit of Snowdon. He meets the godmother of mountain biking. Show more

On a two-day subterranean adventure, Richard Parks overcomes his fear of enclosed spaces to explore Britain's deepest cave. Show more

Richard Parks celebrates the Welsh Year of Adventure. He explores the River Teifi, tackling rapids and meeting the people who live on its banks. Show more

Richard Parks attempts to summit Mount Everest without the use of supplementary oxygen, in a bid to discover the relationship between exercise and dementia. Show more