Supernatural Season 5.2 has just been released on DVD so we spoke by phone to Professor Bill McGuire, a guest lecturer who speaks at a variety of different UK universities on the factors associated on how the world will come to an end.

He is also a top selling author of books such as World Atlas of Natural Hazards, Surviving Armageddon: Solution for a Threatened Planet, and Global Catastrophes: A Very Short Introduction, A Guide to The End of The World.

Bill is a member of the Association of British Sciences Writers and a regular contributor to radio, television, and the press on hazard-related matters. However, a truly biblical apocalypse by demonic uprising wasn't one of the scenarios he regularly addresses.