The Skin of

Martinón is the last inhabitant of Auzal, a village in the mountains where he lives in communion with nature. He only goes down to the valleys twice a year to trade and to buy provisions. But one day he’s convinced …

Six people bound together by a traumatic experience decide to round off a year of group therapy in style. They join each other once more, traveling up to the Scottish Lowlands for a reunion weekend in a 1970s holiday let. Soon a number of mysterious and horrifying events start to expose the cracks in their relationships, and one by one they discover that trust runs but skin-deep. A night of closure turns out to be far more final than they could have anticipated.

We live in a world ablaze with colour. Rainbows and rainforests, oceans and humanity, Earth is the most colourful place we know of. But the colours we see are far more complex and fascinating than they appear. In this series, Dr Helen Czerski uncovers what colour is, how it works, and how it has written the story of our planet - from the colours that transformed a dull ball of rock into a vivid jewel to the colours that life has used to survive and thrive. But the story doesn't end there - there are also the colours that we can't see, the ones that lie beyond the rainbow. Each one has a fascinating story to tell.

Michael revisits his TV travels and fans reflect on his achievement.

The latest archaeology and genetics answer the biggest questions about cats and dogs. Where did they come from? How did they end up living with us? Why do we love them?

Friedrich Engels arrived in Manchester in 1842 and documented the plight of the city's working classes in The Condition of the Working Class in England (1845). 172 years later, Turner Prize-nominated artist Phil Collins is returning Engels to the city where he made his name - in the form of a Soviet-era statue, driven across Europe and permanently installed in the centre of Manchester as the closing event of this year's Manchester International Festival. Collins's film for BBC Four not only documents the statue's journey, but also the lives of Manchester workers today as well as a live inauguration event specially created by Collins to welcome the statue to the city.

Series exploring the history of American art sees Andrew Graham-Dixon feeling the pulse of contemporary America.

Physicist Dr Helen Czerski takes us on an amazing journey into the science of bubbles. Bubbles may seem to be just fun toys, but they are also powerful tools that push back the boundaries of science. The soap bubble with its delicate, fragile skin tells us about how nature works on scales as large as solar system and as small as a single wavelength of light. Then there are underwater bubbles, which matter because they are part of the how the planet works. Out at sea, breaking waves generate huge plumes of bubbles which help the oceans breathe.

Series charting a year on Upper and Lower Lough Erne in the west of Northern Ireland.