When the QC for Julian Assange, Salman Rushdie and Mike Tyson takes to the stage you know you’re about to listen to a man who can inform, convince and compel in equal measure.

Geoffrey Robertson’s talk on Mullahs Without Mercy and the inherent dangers of Iran’s nuclear ambitions was as captivating as it was sobering.  Watch the full session below, including the awesome introduction – a hilarious 1950′s public information film on preparing for a nuclear war.