Robert Oppenheimer, father of the atomic bomb, gave the BBC's Reith lectures in 1953. Sarah Montague and Professor Brian Cox consider the lessons to be learnt from them today.

The Reith Lectures began in 1948 on the Home Service, subsequently moving to Radio 4 and becoming a major national occasion for intellectual debate. As part of the celebrations of Radio 4's 50th anniversary, the network looks back at the first 10 years of the Reith Lectures to explore how they reflect the times in which they were delivered and how well they stand up now.

Producer: Neil Koenig