Chris Andrew (Author) Christopher Andrew is Professor of Modern and Contemporary History at Cambridge University, a Fellow of the Royal Historical Society, in-house historian for MI5, former Visiting Professor of National Security at Harvard University, and guest lecturer at numerous universities. With Oleg Gordievsky, he published KGB - The Inside Story, the book that revealed the identity of the fifth man. He is also the author of The Defence of the Realm: The Authorized Official History of MI5. Professor Andrew is also a frequent presenter of BBC TV and radio programmes on history and world affairs.Julius Green (Author) Dr Julius Green is an award-winning theatre producer and circus director, with over 250 productions to his credit. He is also an entertainment historian, who received an MA in History from Corpus Christi College, Cambridge, and was awarded his PhD by Goldsmiths, University of London. His books include How to Produce a West End Show and Agatha Christie: A Life in Theatre.