From ancient Babylon to the darkest depths of the Cold War, Double Agents have fascinated us for centuries.

In Brief Histories, the monthly special from True Spies, series producer Joe Foley is your guide to this secret world - alongside a treasure-trove of stories and expert knowledge from our archive.

From SPYSCAPE, the home of secrets and skills. A Cup And Nuzzle production. Series producer: Joe Foley.

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