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Series 3 Episode 1

Highly gifted children aged between 7 to 12 take part in a competition, run in association with British Mensa, to find the UK's annual child genius

It's the General Knowledge and Memory Recall rounds, which require the ability to mentally navigate a map of the highways of Great Britain

Factual

Twenty of the country's cleverest kids compete to be crowned the brightest, in 2015