Scytale and Jefferson disk devices

Rob and Jess are going deep undercover to unearth the origins of words from the word of espionage.
🕵️‍♀️ What's the difference between a SPY, and ASSET, and an AGENT?
🔍 What does ESPIONAGE literally mean?
🇬🇧 Was there ever an MI4 as well MI5 and MI6?
These questions answered – and many more – in a supremely secretive episode of Words Unravelled.

🎥 Dr Geoff Lindsey's COVERT vid: https://www.youtube.com/watch?v=NeHRN6GlNOs

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