Things go a little coco-NUTS when Thomas' truck invites the attention of some troublesome monkeys! Courage saves the day when Thomas helps in a cyclone, before rescuing koalas from a bushfire, and Samson overcomes his fear of fireworks. Meanwhile, Duck discovers that Dexter isn't just rusty… he's Really Useful, and Rosie is left feeling a little red. Percy is sent on a wild goose chase looking for an invisible engine and Philip proves that you don't need to be big to be mighty!