Published: 7th June 2019; Set: November 1955
Sodor experiences a foggy winter, during which time the Ministry of Defence test a special new engine which they hope the others won't see.
Tropes:
- Mythology Gag: Henry finished the story about Arthur's ghost in a similar manner to the opening line from "Percy's Ghostly Trick."
- Shout-Out: At the end of the episode, it's revealed that an organization questioned Edward about the island's past with ghosts. As the group is leaving, a box with a symbol is shown— that symbol being the logo for the SCP Foundation.
- This also brings with it a healthy dose of Fridge Horror. Namely, that SCPs exist in this universe. INCLUDING 682.
- With Cat Like Tread: The Ministry was obviously hoping to avoid this by having Sir Topham Hatt try to alter night schedules. Needless to say, it didn't work out.