Series 2013 Episode 4
First Broadcast: 9PM Tue 2 July 2013

The final six go head to head in a debating contest, hoping to make it through to the last quick-fire round and the chance to be crowned Child Genius of the Year 2013.

Eleven-year-old author and world Scrabble champion Shrinidhi may have mastered the written word, but the spoken word fills her with fear.

Can maths prodigy Oscar, who got an A* in his GCSE aged seven, find an algorithm that helps win arguments?

With his photographic memory, nine-year-old Connor has reached the final with ease. But winning a debate requires him to think on his feet, a skill which doesn't come naturally.

Connor's taking on nine-year-old Lara, who has an IQ higher than Einstein.

And while Rohan's parents believe a triumph in the debate could help win a coveted scholarship to Harrow, paleontologist and philosopher Ben is hoping that the support of his friends from Team Geek will help see him through.

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    1. Child Genius 2013: Introductions This video is a clip Child Genius 2013: Introductions Video duration: 1:50 minutes

      Meet the children and their parents Watch Child Genius Series 2013 Episode 1
    2. Child Genius 2013: MENSA Questions This video is a clip Child Genius 2013: MENSA Questions Video duration: 2:00 minutes

      Pressure mounts at the start of the competition Watch Child Genius Series 2013 Episode 1
    3. Child Genius 2013: Air Abacus This video is a clip Child Genius 2013: Air Abacus Video duration: 0:53 minutes

      Maths genius Rosa Marie tests her skills against a calculator Watch Child Genius Series 2013 Episode 2
    4. Child Genius 2013: Hugo's Gamble This video is a clip Child Genius 2013: Hugo's Gamble Video duration: 1:08 minutes

      Hugo attempts to remember as many cards as possible Watch Child Genius Series 2013 Episode 2
    5. Child Genius 2013: Round Two This video is a clip Child Genius 2013: Round Two Video duration: 1:11 minutes

      Preparation for the second round of MENSA tests Watch Child Genius Series 2013 Episode 2
    6. Child Genius 2013: Toilet Training This video is a clip Child Genius 2013: Toilet Training Video duration: 1:56 minutes

      Nine year old Connor has an usual method of brain training. Watch Child Genius Series 2013 Episode 3
    7. Child Genius 2013: Mathematical Magician This video is a clip Child Genius 2013: Mathematical Magician Video duration: 1:32 minutes

      A maths genius prepares for the upcoming debate Watch Child Genius Series 2013 Episode 4

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Earlier this year, 21 highly gifted children aged seven to 11 were selected to take part in a competition run in association with British Mensa, to find the UK's ultimate child genius