Remember how you used to try and make kids turn round at school by staring at the back of their heads? And how they used to go home early crying with… - Derren Brown

I should point out that I don’t condone gambling of any sort unless you can cheat very effectively and stack the odds at least ninety percent on your favour, which is essentially what I’m doing here.

One can be a true believer in anything: psychic ability, Christianity or, as Bertrand Russell classically suggested (with irony), in the fact there is a teapot orbiting the earth. I could believe any of those things with total conviction. But my conviction doesn't make them true. Indeed, it is something of an insult to the very truth I might hold dear to say that something is true just because I believe it is.

Séances date back to the 1800s after three sisters by the name of Fox claimed to be able to contact the dead. They toured America with their demonstrations and attracted the rich and famous and by the end of the century séances had taken off all over the western world. Spirits were manifested, tambourines flew, ectoplasm impossibly erupted from entranced mediums. Then, after forty years of this, rather embarrassed by what they’d started, one of the sisters, Margaret Fox, confessed that they were frauds. The miracles which had started it all off had been a scam. But her confession made very little difference and spiritualism continues to appeal to many people today.