When did espionage become professionalised? What ingenious gadgets did intelligence agents use in the past? And how have animals been used for spying? Speaking with Elinor Evans, Michael Goodman tackles listener questions and popular search queries on the history of espionage and intelligence.
Elinor Evans is digital editor of HistoryExtra.com. She commissions and writes history articles for the website, and regularly interviews historians for the award-winning HistoryExtra podcast
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