Episode XXVIII: Diesel's and Dragons was uploaded on June 21, 2017 and is the fourth episode of the fourth season.


A certain diesel that all engines fear is terrorizing poor Percy. However, Percy looks to a certain artifact from his past that might put Diesel 10 in his place.


The Chinese Dragon is not considered a character as it is a prop.


  • Sodor Ironworks
  • The Viaduct
  • Tidmouth Sheds
  • Knapford
  • Lower Suddery (flashback)
  • Tidmouth
  • Elsbridge Harbor
  • Crosby
  • Wellsworth Dairy


  • This marks the first real appearance of Diesel 10 in The Engines of Sodor, not counting his cameos in earlier episodes.
  • The title is a parody of the game "Dungeons and Dragons".
  • The Chinese Dragon model was made by Crovan's Gate Works, shortly before they shut down. It was not re-uploaded when they returned in 2016.
  • Events from the TV episode Thomas, Percy, and the Dragon are shown in a flashback.
  • The original idea for this episode was to be a story involving Percy and James switching jobs.