The Missing Coach

Donald and Douglas are new to the Railway and have been given numbers 9 and 10 respectively. They go to work with Duck, and are eager to do whatever they need to. After a bit of a talk with Gordon and Henry, Douglas helps Duck in the yards whilst Donald waits to take a goods train. Douglas then offers to take the "Nor' Wester" away and shunt the coaches, however he puts Thomas' special coach in with the rest.
Thomas realizes the coach is not where it should be, and as a result, Donald and Douglas change tenders, which leads to their demise.