Diesel and Theo will be the thirteenth episode of the seventeenth season of Thomas and Friends.



  • Thomas
  • Henry
  • James
  • Percy
  • Toby
  • Theo
  • Diesel
  • Rocky
  • Bertie
  • The Fat Controller
  • Brighet Hatt
  • Farmer Trotter
  • The Bird Watcher
  • Butch (does not speak)
  • Edward (cameo)
  • Gordon (cameo)
  • Duck (cameo)
  • Donald or Douglas (cameo)
  • Bill and Benn (cameo)
  • Emily (cameo)
  • Rosie (cameo)
  • Mavis (cameo)
  • Annie and Clarabel (cameo)
  • Farmer McColl (cameo)
  • The Bargeman (cameo)
  • The Fireman (cameo)
  • Kuffy the Clown (cameo)

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