The Challenge (1998)

S7E2 Percy Gets It Right

While journeying on Toby's aged branch line, Percy notices that the tracks are unstable. He rushes back to the station to alert the other engines, but his warnings fall on deaf ears, leaving him feeling exasperated. Later, Thomas ventures onto the old line and ends up stranded. Concerned for his friend, Percy grows anxious when Thomas fails to come back. What could have happened to him?