Naughty Diesel is an upcoming episode.


Diesel is very naughty to his friends and he got very naughty indeed.


  • Thomas
  • Gordon
  • Percy
  • Toby
  • Duck
  • Sam
  • Diesel
  • Norman
  • Rocky
  • Bulgy
  • Sir Topham Hatt
  • Sailor John
  • Edward (cameo)
  • Dart (cameo)
  • Annie and Clarabel (cameo)
  • Troublesome Trucks (cameo)
  • Henrietta (cameo)
  • Slip Coaches (cameo)
  • Bertie (cameo)
  • Ashima (stock footage)
  • Gina (stock footage)
  • Vinnie (stock footage)
  • Philip (stock footage)


  • At the end of the episode, Thomas mentions the events from the special, The Great Race, stock footage from the said special is also used.
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