Science correspondent Nicola Davis investigates the strange story of Tam O’Braan and his attempts to grow tea in Scotland.

In episode one, Nicola looks back on her first meeting with Tam while working on a feature about tea plantations in the UK. He was selling his award-winning Scottish-grown tea to some of the UK’s finest hotels, but something didn’t quite add up. And Nicola wasn’t the only person taking an interest in his story