Death, money and family are the key ingredients in any last will and testament. They also make a killer cocktail that unleashes a special force not present in any other part of the law.

In this episode of History Lab, we’re looking at how the law determines your last wishes through some truly unusual cases. Whether it's for reasons of urgency, eccentricity or expediency, courts around the world regularly have to make calls on the wishes of the dead. But how does the law know it’s getting it right and what does it mean for those left behind.