As Sodor's oldest engine, Stephen worries about being able to keep pace with the younger engines, especially since Gordon often must slow down for him.
The engines attempt to settle a bet regarding the optimal number of wheels an engine needs by taking the duke and duchess to Callan Castle.
Thomas earns newfound popularity on days football is played due to the fact he and the team's uniform happen to be the same colour.
Emily really admires Caitlin, who shunts her to the castle when she breaks down. But later when Caitlin's brakes fail, Emily has a chance to save her hero from an accident.
An energetic little diesel boxcab named Philip arrives at Knapford and challenges Gordon to a race.
Philip rushes to prevent James from falling off a bridge after James accidentally becomes derailed pulling a long stretch of train.
