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“I sometimes wonder, Nia, if it might be easier to be useful if Diesel wasn't around.”

Diesel Glows Away is the twentieth and final episode of the twenty-third series.


When Diesel hides from the other engines, his plans backfire and he gets a surprise on Sodor.





US and CAN

  • Joseph May as Thomas
  • Kerry Shale as Diesel
  • Yvonne Grundy as Nia
  • Steven Kynman as Paxton
  • Rob Rackstraw as Stanley and Owen
  • Keith Wickham as Den and Norman


  • Going by production order, this is the twelfth episode of the twenty-third series.
  • This episode marks Owen's first speaking role since the eighteenth series episode, Long Lost Friend and the first time he is voiced by Rob Rackstraw. This is also his only speaking role in the twenty-third series.
  • This episode marks Stanley's only speaking role in the twenty-third series, albeit only in a fantasy sequence. On top of that, Rob Rackstraw voices him in the UK dub instead of Matt Wilkinson.
  • This marks the last of a few things:
    • The last episode to be produced by Mattel Creations under their original name.
    • The last episode to have Andrew Brenner as head writer. David Stoten takes over in the following series and Steam Team to the Rescue.
    • Stanley and Norman's last speaking roles.
    • Den and Duncan's last appearances.
    • The last episode to air in the UK before former British narrator, Michael Angelis died from a heart attack on 30th May 2020, fifteen days later.
    • The last episode to feature Paxton as a main character.
    • The last appearance of the Vicarstown Dieselworks.
  • This episode marks the first time Thomas was not seen in a series finale episode, since the sixth series episode, Faulty Whistles.
  • The paint that Diesel used in this episode is also seen in the twentieth series episode, Henry in the Dark.
  • On the Nick Jr. US airing of this episode, it was paired with Wish You Were Here.


  • Diesel, Nia and Paxton travel on narrow gauge track in the tunnel at the Blue Mountain Quarry despite being standard gauge engines.
  • Matt Wilkinson is credited for voicing Stanley in the UK dub, despite not voicing him in said dub.
  • In the Latin American Spanish dub, Nia's line when she thanks Owen is left blank instead of being translated into Spanish.

In Other Languages

Language Title
Brazilian Portuguese Diesel Brilhante
Dutch Diesel is er Gloeiend bij
Estonian Diiseli Hiilgus
Finnish Diesel Hehkuu
German Diesel wünscht sich was
Greek Ο Ντίζελ φωσφορίζει
Indonesian Diesel Yang Bersinar
Italian Diesel Fosforescente
Japanese あやしくひかるディーゼル
Latin American Spanish Diesel el Brillante
Latvian Dīzelis Spīd
Lithuanian Dyzelis švyti Tamsoje
Polish Diesel Świeci
Russian Исчезнувший Дизель
Spanish Diesel Llamando la Atención

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