My “signature talk” is called The Square Root Of Two. It’s the story of a simple four-sided shape that hides a terrifying secret, some vegetarian ancient Greeks, and a MURDER. Oh, and my cat Fatwans is in it quite a lot too. There IS some simple maths, but I display a large warning triangle and play a klaxon sound first, so nobody can say they weren’t warned.
There’s a short fifteen minute version of The Square Root Of Two, or an even better and longer (about fifty minutes) version where we do some physics (the radioactive Demon Core), chemistry (the Poisoners’ Corridor), and biology (wait and see) before I launch into the story of one of the scariest numbers that exists.