It's been a long journey, but finally Joanne is ready to close the book on Furby. She's learned about their rise to fame, and the rumours of espionage. And she's done her best to de-bunk them, by intrusively opening one up for examination, speaking to experts, and tracking down the man behind the marketing. But as the sun sets on her quest, she still needs to find out why the rumour began in the first place. And she needs to speak to David Hampton - the inventor.

That journey takes her via TikTok and FaceSwap - two apps which, Joanne discovers, have been linked to data gathering. Joanne is already fearful of what data she's sharing online, and her browsing habits have radically changed. But one last browse deep into the web reveals a stunning new find - a dossier of evidence which includes the original NSA memo about the Furby... and within it, the real reason it was banned by security experts.

Convinced that she finally understands what went on, Joanne concludes by meeting David Hampton. She learns about the Furby origins, little-known facts about it's powers, and some secrets about the brains behind it. But was Furby designed to spy? David has a surprising answer in store.

A What's The Story podcast for BBC Sounds