Documentary which looks through the history of spy equipment. From the birth of concealed silenced weapons in the Second World War to ultra-sensitive listening devices. Travels between Washington, London and Moscow talking to CIA operatives, MI6 officers, and KGB agents as they tell their stories of scientific brilliance, quirky innovation and daring feats of subterfuge. Also highlights spies' tricks of the trade, their missions, tools and techniques and has exclusive access to the world's first International Spy Museum based in Washington, DC. Shows US assassination devices, concealed weapons, hidden message systems, microdots and more besides.