Pop Goes the Diesel

"Pop Goes the Diesel" is the twelfth episode of the second season.

Plot
The engines are tired of Duck's chatter of his Great Western heritage and are relieved when someone new comes to the yard. The visitor is a diesel shunter called Diesel, who flatters the engines. Duck, however, is skeptical, and leaves Diesel to his own devices. Diesel tries to pull some dirty old trucks, but their brakes are "on" and Diesel becomes furious when he can't move them. To add to that, Duck refuses to help clean up and the trucks sing a rude song about Diesel, prompting the diesel to angrily scuttle away.

Featured characters

 * Henry
 * Gordon
 * James
 * Duck
 * Diesel
 * Sir Topham Hatt
 * Troublesome Trucks
 * Edward (cameo)
 * Percy (cameo)

Goofs

 * In the scene where Duck is exactly side-on, a small space between the face and the model is visible.
 * Henry's tender is missing in the first shot featuring him.
 * Diesel didn't say anything to compliment Percy, so it's odd that Percy was smiling at Diesel too.
 * When Diesel follows Duck the turnbable isn't facing Duck. If it was, the same thing would have happened to Diesel.
 * When Duck and Diesel frown at each other Duck is missing his eyebrows. Duck is also missing eyebrows when Diesel first backs into the shed.
 * Duck isn't in the siding when Diesel tries to pull the trucks.
 * Diesel is a diesel, so there shouldn't have been steam around him when he was trying to move the trucks.
 * When the narrator says "Diesel lost patience" one of the trucks has a piece of hair on it.
 * In the closeups of the trucks' faces that Diesel is trying to move, they are obviously different trucks.
 * When Diesel tries to push the trucks back he backs down onto the breakdown train, not the trucks.
 * In one scene, there isn't a truck in the siding that Duck is in before he goes to collect the other trucks. One appears in the siding during the trucks' song, then after it finishes there isn't.
 * In the scene of Duck seeing Diesel after collecting the trucks, Diesel backs down to the trucks he had been struggling with - straight into them - then he then comes forward a little so as to be directly in line with Duck. Last of all, when Duck leaves, he goes backwards suddenly before heading off.
 * On the cover of the "Diesel's Devious Deed" VHS Diesel's siderods are crooked.

Episode
thumb|450px|left