A train whistle gets them all rushing out onto the platform, but it is a slow stopping train pulling only one coach and one truck. The driver and fireman get off, holding a defective brake wheel, and go to the office to telephone the depot. Whilst there, they make a cup of tea each, and load it with pills from the saccharine bottle, mistaking it for sugar. Mainwaring checks the train politely for the King or his Equerry, only to find the train empty except for a man who is clearly not the King. The Station Master reappears and complains that this train is in the way, but the crew are now asleep in the kitchen, having consumed the sleeping tablets. Pike tells Mainwaring he can drive it, so whilst the Station Master is on the phone, the platoon climb into the cab and set off. The men are enjoying the ride and love the train. The Station Master rushes out after they have gone, and discovers the Verger is clutching the defective steam brake wheel. In the engine cab, Pike announces to Mainwaring that, because of the absence of the brake wheel, he is unable to stop the train, starting a panic among the men. Frazer spots that the Vicar, Verger, Warden and Mayor are chasing them on a handcar. Mainwaring starts to make his way over the top of the train to retrieve the missing wheel that Hodges is brandishing, and although Jones goes with Mainwaring, as usual Jones is a complete liability, and Mainwaring has to save him from falling off several times. Once they reach the back of the train, Hodges throws the wheel, and Mainwaring catches it, then starts to make his way back to the cab. Whilst he and Jones are on top of the train, Pike has the bright idea of putting the engine into reverse to stop it, and they are nearly thrown off. Once the train has stopped, it of course starts to return to the station, and the others on the little hand cart have to work hard to keep ahead of the train. The Station Master changes the points to put the cart and train into a siding, and they all tumble out just as the real Royal Train is heard approaching. They have to parade just where they are by the line, which happens to be in front of a water trough, so when the train goes past they all get soaked.