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Tonight's stories of pioneering scientists and inventors come from the Midlands. Host Adam Hart-Davis investigates the Lunar Society of Birmingham, known as "lunaticks". Its members included James Watt and William Murdock, responsible for a copying machine, revolutionising the steam engine, and gas lighting. Plus the stories behind the gas turbine, the first British car and holography.

Tonight's stories of pioneering scientists and inventors come from Northern Ireland. Host Adam Hart-Davis discovers that the pneumatic tyre, invented by Belfast vet John Boyd Dunlop, began life as a remedy for his son's sore bottom. He also finds out how the name Harry Ferguson became synonymous with the development of the tractor. Taking his bike underwater, Hart-Davis goes in search of the origins of the submarine and wet suit. And, in Armagh, he learns how a child poet and astronomer rocketed to fame.

The last in the series about pioneering scientists and inventors comes from the north west of England. Host Adam Hart-Davis discovers the connection between botany and Wordsworth the poet when he learns about his friend, John Gough, a local botanist who identified many rare plants despite being blind. A bicycle pump and a disgusting jelly help unearth the history of Lake Windermere. Adam climbs to the snowy summit of Helvellyn to try to reproduce John Dalton's weather forecasts. Finally, in Manchester, he learns about Joseph Whitworth, whose move to standardise the nuts and bolts of the engineering industry has endured to the present day.