On 12 January 1970, a British child disappeared from Fairy Meadow beach in New South Wales, Australia. Cheryl Grimmer was three years old. She was never seen again and the mystery has never been solved.
To mark the anniversary of this unique case, the BBC is launching an eight-part podcast series – called Fairy Meadow – presented by BBC correspondent Jon Kay.
Watch the story of how Cheryl went missing.
Correspondent: Jon Kay
Filmed and edited by: Andy Alcroft
Music: Elizabeth Purnell