April 2018 marks the centenary of Nelson Mandela’s birth. He seized centre stage during a historic trial in 1963 and 1964. But there were eight others who, like him, faced the death sentence. They too were subjected to pitiless cross-examinations. To a man they stood firm and turned the tables on the state: South Africa's apartheid regime was in the dock. Recently recovered sound archives of those hearings transport us back into the thick of the courtroom battles.