Sacred Weeds is a four part series documentary investigating the cultural impact of psychoactive plants on a broad array of early civilizations. In each episode the series investigated one psychoactive plant and its cultural significance. Three specialists of various scientific disciplines were invited to monitor two volunteers who had taken each plant. Dr Andrew Sherratt, was the series host. Prior to his resignation from the Uinversity of Oxford, Sherratt was appointed Professor of Archaeology. Each episode began and ended with Sherratt inscribing his diary with his reflections on the series’ scientific and cultural investigations. Sherratt assigned considerably more significance to the psychoactive properties of plants in ancient civilization and the prehistoric period than expert knowledge hitherto.