Thomas Maier is an award-winning author, journalist, and television producer. His book Masters of Sex was the basis for the Emmy-winning Showtime drama that ran for four seasons. His other books include When Lions Roar: The Churchills and the Kennedys; The Kennedys: America's Emerald Kings; Dr. Spock: An American Life (named a "“Notable Book of the Year" by the New York Times); and Newhouse: All the Glitter, Power and Glory of America's Richest Media Empire and the Secretive Man Behind It (winner of the Frank Luther Mott Award as Best Media Book of the Year presented by the National Honor Society in Journalism and Mass Communication). He has worked as an investigative reporter for Newsday for over thirty years.

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.