On 17 December 1967, Harold Holt, the immensely popular prime minister of Australia, went for a swim -- and vanished. In the decades since, his family and the public still have questions about what exactly happened. In tonight's episode, Ben, Matt and Noel explore a mystery that remains unsolved in the modern day, along with a meditation on empathy, and a bevy of increasingly bizarre conspiracy theories.

They don't want you to read our book.: https://static.macmillan.com/static/fib/stuff-you-should-read/

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