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"Harold told me you were - a wizard. He says he can beat you at some things, but not at being a submarine! I don't know what you to get up to sometimes, but I do know that you're a Really Useful Engine."
— Sir Topham Hatt

Percy's Promise is the second episode of the third season. It first aired on Shining Time Station in the episode Washout in 1991.


Every Summer, the Island of Sodor is busy with holiday makers visiting the Island to see the sights. With no sign of inclement weather, visitors often enjoy going to the mountains or the valleys, while children enjoy the seaside. One day, Thomas is busy on a coastal run taking children to the beach. When Thomas reaches the next station where Percy is taking some trucks to the harbour, Percy tells Thomas he wishes that he take children rather than trucks, but Thomas states that the children he was taking are the Vicar's Sunday School. He will also be busy in the evening but then offers Percy to take the children back home, in which Percy agrees to do so.

At Dryaw, Harold warns Percy there is inclement weather and to run very carefully. At the next station Edward warns Percy to be careful of an upcoming storm, but Percy knew what was going on. After the children enjoy a fun day at the beach, the weather turns bad and begins raining hard. Percy arrives at the station he came to earlier where Annie and Clarabel are glad when Percy arrives just in time to take the children home. Percy is disgusted by the rain, but despite thinking of being at the sheds, manages to get on with it.

As Percy begins his return journey, he battles onward through costal villages and the countryside. The heavy rain makes the river rise very quickly, Visibility is poor for Percy and battles the elements, but there is trouble ahead; a flood has flowed over the tracks, and the water extinguishes Percy's fire. His crew then try to find more firewood and his fireman suggests the guard gives some floorboards from the brake van. The guard grumbles that he had just swept the floor but still manages to help. Percy's firebox burns well and feels more comfortable again. Then Percy sees Harold, who thinks Harold has come to laugh at him, a parachute thuds on top of Percy's boiler. His driver laughs and tells Percy that Harold has thoughtfully given the crew hot drinks. Percy thanks Harold for the hot drinks, and Harold thanks them back before flying away.

Percy bravely continues on with his journey and loses steam, but keeps going. Percy makes several efforts, and triumphantly brings the children home. Thomas congratulates Percy for keeping his promise despite everything. The Fat Controller and Harold arrive and thanks both Percy, his crew, and the men. The Fat Controller is impressed with Percy's efforts, and congratulates Percy for being a really useful engine.




  • This episode is based on the story of the same name from The Railway Series book, Percy the Small Engine.
  • In the restored version, the shot of Percy arriving at Elsbridge with Annie, Clarabel and the brakevan is replaced by an extended shot of Thomas waiting for Percy.
  • In the UK narration, Percy says "Pah!" when he is talking to Harold, but in the US narration, he says "Huh!".
  • In the US narration, the line "He set off for the beach. It was a beautiful day, but Edward was worried" is omitted.
  • Some of the music in the US version and the early UK narration is absent.


  • At the beginning of the episode, Thomas is on Toby's old tramway.
  • When the narrator says "the river was rising fast," it is obvious that the water for the river is coming from a pipe.
  • When Percy plunges onto the flooded tracks, water appears to come above his firebox. However, in the next shot, the water is below the buffers.
  • Why did Percy use a brakevan for the guard instead of Clarabel?
  • In a rare picture, Percy's roof is lifted.
  • This episode should have come before Percy Takes the Plunge, as the events of this episode were mentioned in the other.
  • When the driver and fireman bring the floorboards to Percy's cab, they drag them through the water, making them wet.
  • When Thomas is on Toby's old tramway, Clarabel is facing the wrong way. Then in the next shot, Annie is facing the wrong way.
  • Despite the fact that the water only reached Percy's footplate, he has a water line across his boiler when he meets Thomas at the end of the episode.


In Other Languages

Language Name Meaning
Dutch Percy's Belofte Percy's Promise
German Percys Versprechen Percy's Promise
Spanish La Promesa de Percy Percy's Promise
Brazilian Portuguese A Promessa de Percy The Promise of Percy
French Les Promesses d'Percy / Percy Promettre (Québec) Percy's Promises / Percy's Promise
Danish Percys Løfte Percy's Promise
Norwegian Percys Løfte Percy's Promise
Swedish Percys Löfte Percy's Promise
Finnish Pekan Lupaus Percy's Promise
Welsh Addewid Pyrsi Percy's Promise
Turkish Percy'nin Sözü Percy's Promise
Czech Perchyo Slib Percy's Promise
Polish Obietnica Piotrka Percy's Promise
Hungarian Percy Fgérete Percy's Promise
Italian Salvataggio Rescue
Catalan Percy Promesa Percy's Promise
Slovak Perciho Sľub Percy's Promise
Slovenian Poldijeva Obljuba Percy's Promise
Romanian Promisiunea lui Percy Percy's Promise
Japanese パーシーとこうずい Percy and the Flood
Chinese 培西的承诺 Percy's Promise
Russian Обещание Перси Percy's Promise
Ukrainian Обіцянка Персі Percy's Promise
Thai สัญญาจากเพอร์ซี Contract from Percy

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