The class are being measured by Mr O'Dear to see how much they've grown. They're all getting bigger, but their poor plant isn't growing.
The children have just arrived at the school when Conor announces that he's lost his Captain Smelly doll. After a quick search he turns up inside Conor's hood. Crisis averted, the group head off on a long hike to the Foggy Isthmus.
After hurting his leg playing football, Conor has to use a crutch and isn't able to walk very far. This gets the children thinking about how different animals get around.