Christopher Andrew is Emeritus Professor of Modern and Contemporary History at University of Cambridge, Official Historian of MI5, Honorary Air Commodore of 7006 Intelligence Squadron in the Royal Auxiliary Air Force and a former Visiting Professor at Harvard, Toronto and Canberra.

Daniel Hoffman is a former Senior Executive Clandestine Service Officer with the CIA. His combined 30 years of distinguished government service included high-level positions not only within the CIA, but also with the U.S. military, U.S. Department of State, and U.S. Department of Commerce. Mr. Hoffman is well experienced in counterterrorism, cyber and counter-intelligence and specialises in issues related to the Middle East, South Asia and Russia.