It's the General Knowledge and Memory Recall rounds, which require the ability to mentally navigate a map of the highways of Great Britain
It's the second stage of the contest, with rounds in maths and extraordinary memory. Can Holly bounce back? And does the ultra-competitive 11-year-old Mika want to win too badly?
The two rounds for the last 12 competitors are a comprehension and extreme spelling test. With each round seeing two children eliminated, leader Thomas is feeling the pressure.
It's the semi-final, and this round's tests are on logic and reasoning, and a complex memory test on human anatomy. Only five children can proceed to the final round.
It's the Child Genius final and the remaining five gifted youngsters take on the specialist subject round, including the curvature of space time and a history of cryptography