Duncan Gets Spooked is the twenty-fourth episode ever made in Season 5.
After Rusty helps Peter Sam by pushing him and his trucks to the water tower, 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 this gives Peter Sam's driver 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 just an engine formed by fireflies) Duncan is spooked and runs back to the safety of the shed.
- When Skarloey passes by in the first scene, a red wire is visible underneath him.