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“Help! Help! Emergency! Thomas has had a terrible accident!”

Panicky Percy is the eleventh episode of the twenty-third series.


Hurrying back home one snowy morning after being delayed, Percy avoids falling into the turntable well on the icy rails at Tidmouth Sheds. Nia warns everyone about the dangers snow could bring, harking back to her accident in China. Percy, intimidated, suggests that they all stay in the sheds, but Emily and Thomas persuade him otherwise. Thomas tells Percy to enjoy the snow and that he will meet him later at Knapford Station.

As he goes throughout his day, Percy becomes very paranoid about the snow, imagining potential accidents where there is nothing wrong at all, at one point thinking he is going to have a head-on collision with Diesel when he is not even on the same track. However, Percy really starts panicking when Thomas is nowhere to be seen at Knapford, especially when he notices Annie and Clarabel are still in the yard. He comes to the conclusion that Thomas never came back from his job at Arlesburgh and must therefore still be on Duck's branch line. Thinking he has been caught in an avalanche like Nia was, Percy recruits Rebecca, and Duck along in passing, to help him find his best friend. After Rebecca leaves to search the Main Line, Percy rushes along the Little Western alone worrying over nothing. Then, he turns a corner too quickly and is derailed.

Meanwhile, as she alerts others to let them know the news of Thomas being missing and involved in an accident, Rebecca finds him at Brendam Docks — she is puzzled to see that he is absolutely fine.

Percy, still derailed, is found by Nia, along with Harold, Rebecca, Emily, Duck, Henry and Gordon — who mistake Percy for Thomas — and lastly, Thomas himself. After Thomas explains that he was just diverted to deliver extra salt for the icy roads, preventing him from returning to Knapford, Percy apologises and promises to never again panic over nothing. He does exactly that after realising James is absent, only for him to show up at that moment, indignant at not having been invited to their "gathering," provoking a chorus of laughter among the engines or, in Gordon's case, an annoyed "Oh, the indignity."





US and CAN

  • Joseph May as Thomas
  • Kerry Shale as Henry, Gordon, Diesel and Harold
  • Rob Rackstraw as James
  • Christopher Ragland as Percy
  • Jules de Jongh as Emily
  • Yvonne Grundy as Nia
  • Rachael Miller as Rebecca
  • Keith Wickham as Sir Topham Hatt
  • Steven Kynman as Duck (uncredited)
  • Teresa Gallagher as Stephen Hatt and Bridget Hatt (uncredited)


  • Going by production order, this is the fourth episode of the twenty-third series.
  • This episode marks Duck, Stephen Hatt and Bridget Hatt's only appearances in the twenty-third series.
  • This episode marks the last of a few things:
    • Duck's last speaking role.
    • The last appearance of Tidmouth Tunnel.
    • The last episode released in the 2010s in the UK.
    • The last episode to use stock footage.
  • This is the only twenty-third series episode where the snow appears.
  • Apart from laughter, Henry and Duck have no dialogue in this episode. However, Duck is humming when he first appears, and says "Oh" when he hears Percy call for him.
  • Stock footage from Big World! Big Adventures! is used. Similar scenes from the special were used during the fantasy sequences, but with Thomas replacing Nia.
  • This is the first episode with a few things:
  • As of this episode, Gordon's snowplough changes to one in the same design as Emily's.
  • On the Nick Jr. US airing of this episode, it was paired with Diesel Do Right.


  • In the first shot of Tidmouth Sheds, Percy's snowplough can be seen sticking out of the sheds before he arrived.
  • Percy's handrails are brass instead of silver.
  • The middle section holding up Emily's handrail is gold instead of black.
  • When Percy races past Duck, Duck's right siderod is rotating too fast when he slows down.
  • Duck is seen laughing at the end of the episode, but his voice is not heard. This may be because his voice got drowned out by the other engines.
  • Steven Kynman is not credited for voicing Duck in this episode in both English dubs. Along with Stephen Hatt and Bridget Hatt are not in Teresa Gallagher's list of characters.
  • Kerry Shale is not credited for voicing Diesel in the UK and US dubs.

In Other Languages

Language Title
Brazilian Portuguese Percy Apavorado
Dutch Paniekerige Percy
Estonian Paanika-Peeter
Finnish Paniikkinen Pekka
German Percy in Panik
Indonesian Jangan Panik Percy
Italian Percy nel Panico
Japanese しんぱいしすぎのパーシー
Korean 무서운 상상은 그만
Latin American Spanish Percy en Pánico
Latvian Satrauktais Pērsijs
Lithuanian Panikuojantis Persis
Polish Panika Piotrusia
Russian Перси-паникёр
Spanish Percy Entra en Pánico
Turkish Panik Percy

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