The Missing Coach was planned to be an episode of Thomas and Friends, but it was cancelled
Donald and Douglas, now numbered 9 and 10 respectively, realise that they only have numbers painted on their tenders, the only ways to distinguish between them. The Fat Controller introduces the twins to Duck, who shows them around. At night, the twins put Gordon and Henry in their places after the two big engines tease them about their whistles. Shortly afterwards, Douglas is shunting in the yard and frets about being sent away, causing him to forget to shunt Thomas' special coach. The twins decide to swap tenders so as to fool the Fat Controller that they have nothing to do with the missing coach, but he is not fooled and severely reprimands Douglas.