Brain Freeze S03E01 - Blood

Doctor Knowles and Professor McCork get to the bottom of some of life's biggest science questions. Dr Knowles and Professor McCork ask the question 'How does my heart keep beating?' Backstage, Ms Hucklebuck challenges everyone to solve a tricky riddle. Colin decides to start a new fitness regime which helps Knowles realise that she might need more than pure brainpower for this tricky challenge.