Cautionary Tales is one of my favourite podcasts, which I think you’ll love too if you haven’t already heard of it. So we're doing an episode swap for Halloween!

Cautionary Tales is a historical podcast about mistakes and disasters from the past, and what we can learn from them today, narrated by journalist and author Tim Harford.

In 1980s Britain, intricate patterns began appearing in farmers' fields—shapes pressed into the wheat by some unknown force—all under cover of darkness. What caused these crop circles? 

Could it be an alien language, magnetic fields, strange weather phenomena...or one big hoax? No one could agree, until a scientist came up with a way to test what was really behind them…

This is Cautionary tales, Aliens in Wiltshire.

I hope you enjoy it - and you can hear more Cautionary Tales wherever you listen to podcasts…