A Guardian Science mini-series revisits the case of Tam O’Braan, who claims to have helped develop Scottish tea growing while supplying tea to hotels and shops. In earlier installments, Nicola Davis reports that growers in Scotland become suspicious as they try to understand what is being sold and where it comes from. The series describes how scientific approaches are used to investigate the supply chain and identify inconsistencies in the tea being provided. By episode two, the narrative focuses on the growers’ concerns and the way additional testing and analysis help narrow down questions about O’Braan’s product origins. In episode three, the story reaches a culmination described as O’Braan’s “lies” coming to a head, with the series reporting on revelations about the source of the tea supplied to commercial buyers. The account also references O’Braan taking the stand at trial and Scottish growers receiving further answers about what transpired. The reporting also raises questions about what remains of the Scottish tea industry after O’Braan’s involvement. Across the episodes, the emphasis remains on tracing the provenance of the tea and the implications for growers.