Description:Psychological illusionist Derren Brown brings another extraordinary example of his particularly cool brand of artifice to our screens. The established Master of Mind Control has developed a guaranteed system for winning at the horses. Not only that,he explains exactly how he does it to everyone watching so they can use it for themselves. Derren takes a random member of the public and begins sending her anonymous predictions twenty four hours before a series of races. Over the course of a few weeks,the single mum from London sees the System working again and again,and so begins to place larger and larger bets winning every time,finally scraping together every last penny she has to risk it all on one final race. Can there really be a perfect system for winning at the races? Find out in this compelling one hour special from Channel 4.