After Rusty helps Peter Sam to the water tower with his train, Peter Sam's trucks break away and fall into a ravine. The Fat Controller punishes Peter Sam by making him work in the yards until he can trust him again. Duncan chortles that Peter Sam's trucks will return to haunt him, so Rusty tells him of an engine who tried to cross the same ravine and fell into the swamp below. Duncan is dismissive, but Peter Sam's driver gets an idea. He and Duncan's crew plan to teach Duncan a lesson and take him across the bridge. After seeing the ghost heading towards him, (though it is actually just an engine formed by fireflies) Duncan is spooked and runs back to the safety of the shed.
This is the first episode to use the new large scale models of the Skarloey Railway engines, although Duncan, Peter Sam, and Rusty's small scale models were used in the shed scene. However, in the fourth season, larger than normal models of the narrow gauge engines were used in close-ups.
In the UK version, when the trucks fall into the ravine, the music is omitted.
The ghost engine uses Skarloey's model.
The shed that Rusty, Peter Sam and Duncan were at was really the shed from Rheneas Station from the previous season.
This episode most likely takes place during the events of Rusty and the Boulder, as the quarry is seen in this episode. In the aforementioned episode, it is stated that the quarry is brand new and is also then closed in a short amount of time.
The "Best Quality Diesel Oil" barrel from Bowled Out can be seen in the shot of the workmen looking at the Ghost Engine.
This marks the only appearance of the Old Iron Bridge in the television series to date.
When Skarloey passes by in the first scene, a red wire is visible underneath him.
In the UK narration, the narrator says that Rusty whistled goodbye, but Rusty is a diesel, so he does not have a whistle.
In the US and in various international versions, when Rusty leaves Peter Sam at the water tower, he makes puffing noises despite being a diesel.
Duncan's face moves when he cries "Whoo-oo-oo!". This also happens to the other engines in this scene.
Because both scales of models were used, Rusty's face changes size in the shed scene.
When the fireflies form the engine, the end of the tracks is visible.
When Peter Sam's driver speaks to Duncan's crew about the trick, his eyes are wonky.
In a rare photograph, Peter Sam has his old funnel and the workman next to him is missing his legs.
When the Ghost Engine goes on the bridge, he is white, but when he falls, he is red. This is because they used Skarloey's model as the Ghost Engine.
Due to a film cut, when Duncan's face fades from shut-eyed to looking sad, his cab moves slightly.
In the US narration, Alec Baldwin says "It's as tame as a pet rabbits."