Archive is an investigative documentary series hosted by Tommie Trelawny and Nicky Anderson. Following the success of The Interruption, listeners can expect another captivating story from Season Two: The World's Hardest Puzzle.

In 2012, a mysterious organisation known as Cicada 3301 announced itself on the message board, 4chan. The cryptic post appeared online, seeking 'highly intelligent individuals.' What followed became known as the hardest puzzle on the internet. One that took players across the internet and into real-world locations. After two years of enigmatic posting, it disappeared - and was never seen again. The final puzzle was never solved.

Nearly a decade later, Tommie Trelawny and Nicky Anderson decide to take on Cicada 3301 for themselves. Who was behind these mysterious puzzles? And what did they want to achieve?

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