Examine the story of Japans’ elaborate espionage network, including the build-up to Pearl Harbor and beyond.

Mata Hari, Sidney Reilly, Lawrence of Arabia, Cicero, Lonsdale, the Lucy Spy Ring.

The French had a sophisticated intelligence network, which was active during WWI, confronted the Bolsheviks during the inter-war years, and has continued from World War II to today.

Britain's counter-espionage service proved highly effective during both World Wars but later faced criticism for failing to expose the Cambridge spies.

Lenin’s feared secret police, the Russian Bolshevik Cheka knew no bounds and was run by the dreaded Feliks Dzershinsky, who founded the Gulag Archipelago.

From the Zimmerman Telegram in 1917 through to recent breaking of Russian codes, many battles were won or lost because one side could read its opponent's intercepted messages.

The Glavnoe Razvedyvatelnoe Upravlenie served as the Soviet Union's chief military intelligence group, producing a network of spies that operated worldwide and still employs 100,000.