The next morning, Matthew's temperature has lowered and he returns to school. His mum is still concerned about him. At school, Matthew has a biology lesson and he asks his teacher, Miss Blayde, about reproduction in a single sex species. Later, his dad gets a new Citroen car. Everyone is excited, but Matthew stands next to the car in a terrible, distressed state. Chocky finds the car stupid and old-fashioned and hates it. At the next Maths lesson, Matthew starts using the binary code to count as that is what Chocky uses. He uses Y and N, for Yes and No, instead of 0 and 1. Matthew plays an electronic game with his friend Colin. When it is Matthew's go, Chocky is curious and she makes the screen explode.