BBC Four Tuesday

Huw Stephens learns the history of the Welsh slate industry at the National Slate Museum in Llanberis, including the story of the great quarry strike of 1900-1903

Julia Bradbury visits north-east Scotland to walk along the Speyside Way, the route of a railway that served a remote area and a world-famous drinks industry

Jerry takes out another endowment policy and Tom and Barbara begin to have misgivings about their plans for old age. Special performance recorded in the presence of Elizabeth II

The government faces financial ruin, but that does not seem to worry Sir Humphrey, who goes to extreme lengths to get his pay rise approved

How Danish corporate lawyer Amira Smajic teamed up with investigative journalists to set up corrupt clients in front of hidden cameras. In Danish

How the ties between the Danish underworld and the Danish establishment tightened as legal advice was sought for businesses looking to manage bankruptcies discreetly. In Danish

Tim Marlow presents this documentary drama chronicling JMW Turner's life, including his tragic childhood, secret affairs and the extremes to which he pushed himself in his work

Historian Sam Willis explores the criminal underworld of Britain in the 17th and 18th centuries, beginning with the arrival of the highwayman

Marking the first 150 years of the Tube, the world's oldest underground railway system and a peculiarly British institution used by three million people every day

Huw Stephens learns the history of the Welsh slate industry at the National Slate Museum in Llanberis, including the story of the great quarry strike of 1900-1903

Julia Bradbury visits north-east Scotland to walk along the Speyside Way, the route of a railway that served a remote area and a world-famous drinks industry

Tim Marlow presents this documentary drama chronicling JMW Turner's life, including his tragic childhood, secret affairs and the extremes to which he pushed himself in his work