Duck still can't quite place Sheffield, the new engine. But following incidents with Mike and Henry, Donald thinks he's got some answers.
This episode contains examples of:
- Runaway Train: Mike became one after a teenager touched the regulator. Luckily, Sheffield saved him by moving a truck of sand for him to land on from the chute.
- Same Character, But Different: Sheffield is revealed to be Sixteen, the engine Wilbert once worked with.
