Who is a genious and what makes them become one? In this documentary Marcus du Sautoy a professor of mathemathics looks deep into this question to try to understands why. There are a number of questions to answer which are looked at in detail such as; what are geniuses? and is their physical brains fundamentally different to ours?

Marcus du Sautoy meets people who are considered to be genius such as professor Arthur Benjamin who can make fantastic calculations in his head faster than people around him could do with a calculator.