Every time we seek treasure and eventually find, we get a hit of endorphins that tickles the happy parts of our brains.

There are tales of extraordinary discoveries; King Tut’s tomb, The Mona Lisa, Viking gold. Incredible things that took ingenuity and dedication to uncover. Wouldn't it be remarkable to strike it lucky and find real treasure buried for hundreds or even thousands of years? Every rabbit hole we go down, every mystery we try to solve scratches that itch. It might be offline, or on. What does it look like? How do we find it? And is it wise to do so?

Archaeologist Peter Reavill tells us about the discovery of an astonishing Viking hoard in Herefordshire, but like so many tales of treasure warn, it became a curse to those who found it. They chose to value secrecy about what they discovered digging up the hoard, higher than its historical value.

Stefan from Germany is sitting on an unbelievable hoard of digital treasure - $371,000,000 but with only two goes left on his flash drive to guess the password, it became such a curse it drove him to contemplate ending it all.

And alternate reality game developer Dan Hon introduces us to Perplex City, an online and offline treasure hunt which led Andy Darley to dig up a metal cube claim a£100,000 prize. Dan draws similarities between alternate reality games and how QAnon works and we hear from Leila who after becoming obsessed with QAnon explains how a search for information, patterns and connections became the digital equivalent of seeking treasure but became so toxic it started affecting her mental health until she managed to pull herself out of it.

Producer Kate Bissell