Fiona Bruce and the team of experts welcome thousands to Bletchley Park near Milton Keynes, home of the Enigma code-breaking team in World War Two.
Objects under scrutiny include a pair of important and valuable candlesticks, pieces rescued from the golden age of British liners, and intriguing evidence of early encounters with the Beatles.
Plus there's a surprise appearance from an airborne visitor.
Cast of this episode
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Guest stars
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