It's all come down to this. Every single thread, every single character. 

There's a reckoning coming - and it took 300 years, and covered Europe, The Caribbean, Europe, Middle East, North America, Africa - but there's no escape. 

Like the rest of the series, today's episode looks at one of the most intensely debated, scrutinised and long-standing mysteries today - and not only provides answers you mightn't have heard before, but an entirely new world of insight and intrigue where fact and fiction meet. 

In this special double-length season finale, you'll finally get the answers to the secrets you were craving. 

But careful - there's a reason why they're hidden. 

Cicada 3301 is where it begins. 

And now, you'll see how it ends. 

Make sure to like, comment, and recommend The Sulphuric Secrets to those who might enjoy it.

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MAJOR SOURCES:

• Step-by-Step on how the puzzle was solved: https://www.boxentriq.com/code-breaking/cicada-3301-first-puzzle-walkthrough
• PDF of the Libur Primus (untranslated): https://www.3301archive.com/liber-primus/
• Libur Primus (translated): https://uncovering-cicada.fandom.com/wiki/Liber_Primushttps://interestingengineering.com/a-modern-day-treasure-hunt-cracking-cicada-3301