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Ten mysteries. One rule: don’t reach for the paranormal if human behaviour already explains it. We sit down as Bonus Dad and Bonus Daughter and put a “top ten” list of infamous unsolved mysteries under the microscope, while Mum’s disapproving swear-jar voice pops up at exactly the wrong moments.

We start with the Tanzania laughter epidemic, where uncontrollable laughter spreads from schoolgirls to whole communities, complete with fainting, pain, and panic. From there we chase coded riddles and vanishing acts: the Somerton Man and the haunting “Tamam Shud” clue, the Springfield Three who disappear without a struggle, and Malaysia Airlines flight MH370, where the lack of a distress call and an off-course turn still fuels hijack theories. We also dip into stranger corners of true crime history, including Brazil’s lead masks case with its cryptic instructions, and the Max Headroom broadcast hijacking that feels like early internet chaos delivered through 1980s television.

As we work through each story, we keep coming back to Ockham’s razor and the psychology of the unknown: why missing context makes rumours multiply, and why “simple” doesn’t mean “comfortable”. By the end, we’ve confidently “solved” nine out of ten, but the Zodiac killer remains the one that won’t sit still, with unsolved ciphers and a trail of questions that refuses to close.

If you love unsolved mysteries, true crime podcasts, and smart, funny family debate, hit subscribe, share this with a mate who’ll argue back, and leave us a review with your theory: which case do you think we got completely wrong?

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