In this episode Derek and Lawrence chat to John Gater. John is an geophysicist who's had a long pioneering career in archaeology. He is best known says work on Time Team but was instrumental in the early commercial adoption of geophysics in archaeology having worked for companies such as British Gas and the English Heritage Ancient Monuments Laboratory as well as Bradford University Research. He also founded the company Geophysical Surveys of Bradford (GSB) before merging with the SUMO group. The trio discuss John career, including his stories of the earliest days of geophysics, before discussing the history of Time Team and sharing memories of their recent digs.