Based on the story of the same name from Edward the Blue Engine.

After one delay too many, James complains about Edward being too old and slow. The next day, two boys wander into James' cab and fiddle with his controls. James ends up running away down the line without a driver or fireman, and Edward is sent to chase after him with some help from an inspector.

Based on the story of the same name from Percy the Small Engine.

One day, Percy annoys Gordon and then tricks James into staying in the shed all day. When he gets into trouble with the Fat Controller, Percy decides to stay out of their way for a while. But when he is asked to take a train to Knapford he gets careless and for revenge, James and Gordon trick Percy into misreading a signal.