TV Guide BBC Four Tuesday

In Wakefield, West Yorkshire, Michael Portillo visits the National Coal Mining Museum for England at Caphouse Colliery. In Leeds, he heads for the Chapeltown area to investigate the origins of the Leeds West Indian carnival in 1967 and tries his hand on the steel drums

Julia Bradbury continues to follow the routes through the Lake District taken by renowned walker Alfred Wainwright. Starting in the Cumbrian village of Grasmere, she sets off up Helm Crag, a fell defined by the collection of rock formations at its summit and the only one in the area the writer never truly conquered

Jim gets wind of a major financial scandal in the City that is bound to have damaging repercussions for the government. With the party conference looming, he decides it's time for him to take swift and firm action - but Sir Humphrey has other ideas. Political comedy first broadcast in 1987, starring Paul Eddington and Nigel Hawthorne

Jim feels local government isn't really representative, so is eager to hear more about proposals to reform the system. Sir Humphrey fears this would lead to the civil service losing its power and turns to an unlikely ally to help persuade the prime minister to think again. Political comedy first broadcast in 1988, starring Paul Eddington and Nigel Hawthorne

Lawyer and statesman Thomas Cromwell served as chief minister to Henry VIII from 1532 to 1540 and has gone down in history as one of the most corrupt and manipulative people ever to hold power in England. In this documentary Diarmaid MacCulloch reveals another side to the man, arguing that Cromwell was a principled idealist and revolutionary whose radical evangelism laid the foundations for the modern British state

Former Poet Laureate Andrew Motion visits Hull, the city where Philip Larkin wrote some of his most famous verse while working as a university librarian, and discovers a previously unknown work by the poet. He also meets Betty Mackereth, who discusses her relationship with Larkin

Part one of two. For thousands of years, America's national mammal numbered in the tens of millions, sustaining the Native people of the Great Plains, whose cultures became spiritually intertwined with the animal. By the 1880s, the buffalo had been driven to the brink of extinction by newcomers to the continent. Ken Burns recounts this collision