Koko challenges Wilson to see if they can stay awake all night! Morning comes, and Wilson declares himself the winner – just as Vee gives him a job for the day: he’s going to be collecting the mail and taking it to the sorting office. Wilson struggles to keep his eyes open and Koko finds him fast asleep on a siding but is it too late? / The trainees are taking their passenger test. If they pass, they’ll be able to carry passengers all on their own. Brewster and Wilson are a little nervous, but Koko is confident – after all, she’s a passenger train! However when Simkins coughs and sets the machine off with a deafening beep. Koko jumps and Simkins gets thrown across the carriage!