Broadcaster Mark Dolan comes face to face with human extremes once more as he goes in search of some of the world’s most incredible individuals in this new four part series. But finding these people is just the start of his mission.

His real journey in this series is to discover how and why some people can become extraordinary, even if they’re not always born that way to begin with. In The World’s Cleverest Child and Me , Mark Dolan meets children with mind-boggling mental capacities – but are these young geniuses a force of nature or the product of intensive nurture?

Wednesday 28 January 2009
10:00pm, Channel 4