Episode Title:Faulty Whistles.Episode Description:When Peter Sam accidentally gets his whistle knocked off by a branch and is barred from working until he gets a new one, Duncan teases him and boasts that any proper engine has a whistle. To prove his point, Duncan starts whistling loudly, annoying the other engines and Elizabeth. Duncan's whistle eventually comes loose while he is delivering a headmaster and an organ, and soon, while trying to whistle loudly at Terence, Duncan blows his whistle off by accident. The headmaster's organ becomes Duncan's temporary whistle until he gets a new one. At first, Duncan is not pleased with this, but when the other engines inform Duncan that he did well without his whistle, Duncan feels better.