Spotless Record is the 15th episode of season 7.
A new tank engine with a "spotless record" called Arthur arrives. Arthur's first job is to take a train of fruit to market, but the freight cars tease Arthur. Thomas, sensing a chance for mischief, advises Arthur to tell the trucks to stop singing. Arthur does and the furious cars decide to pay him out. On Gordon's Hill, they bump forward and crash into the back of Duck, spraying fruit everywhere. When Thomas arrives to help, he confesses the incident was his fault, and gets to work. Arthur is later having a washdown when Thomas apologizes and the two become friends.