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“If it wasn't for Toby's heroic actions, King Godred's crown would have been lost. He is indeed a remarkable engine with a heart as golden as this crown!”
―Sir Robert Norramby

Heart of Gold is the fifth episode of the twenty-third series.


Two suspicious figures lay a map onto a desk to confirm the location of King Godred's crown, laughing with certainty that it will soon be theirs.

At Ulfstead Castle, Toby has been asked by the Earl to work for him while Stephen is at the Steamworks. However, he is insulted by Diesel and two passengers who believe he looks too old-fashioned and belongs in a museum. Millie advises Toby to ignore them, but they continue to insult and ridicule him during their tour of the castle grounds. Meanwhile, while onboard Toby's train, the two suspicious people from earlier notice a disused pump trolley laying off to the side of the tracks.

That evening, Millie and Glynn advise Toby to forget about the passengers and get some sleep. He is awoken by the sound of breaking glass and sees that King Godred's crown has been stolen by the two thieves, who are escaping on the pump trolley. Toby pursues the two thieves, but they set the points against him and escape. They believe they have lost Toby until they accidentally turn on one of the animatronic dinosaurs in the Dinosaur Park. This alerts Toby to their presence and he is able to catch the thieves, who are then restrained by his driver and fireman while the Earl takes back the crown.

The next morning, the two snobby passengers have changed their stance on Toby, and they apologise to him for misjudging him when pointedly mocked by Millie. They and the Earl praise Toby as a hero for stopping the thieves, even defending him from Diesel when he teases him.






  • Joseph May as Thomas
  • William Hope as Toby
  • Keith Wickham as Glynn and a Passenger
  • Kerry Shale as Diesel
  • Miranda Raison as Millie and a Passenger
  • Mike Grady as Sir Robert Norramby
  • Rob Rackstraw as a Man with a Green Waistcoat and Grey Hair and a Thief
  • Ian McCue as a Thief


  • Going by production order, this is the third episode of the twenty-third series.
  • The title of the episode is a reference to the Neil Young song of the same name. According to Michael White, the original working title for this episode was Oldies but Goldies, which was a reference to lyrics from the model series song, Toby. But "Heart of Gold" was decided upon instead.
  • This is the first time since becoming narrator where Thomas does not appear in the episode itself.
  • This marks Glynn and Sir Robert's only appearances in the twenty-third series as well as Glynn's last speaking role to date.
  • This episode marks the only time Stephen was referred to by the name in the twenty-third series.
  • The workman's line "Oh, sorry" is reused from Daisy's Perfect Christmas and Samson and the Fireworks (despite being spoken by Samson's driver in that episode).
  • This is the first episode of the show's rebrand to have a former Steam Team member as the lead character. Toby is also the only Steam Team member featured in this episode, former or otherwise.
  • In the fantasy sequence, Toby appears in his Railway Series livery (minus the blue side plates).
  • This is the first episode that does not physically feature Thomas since the twenty-first series episode, Runaway Engine.
  • The lamp Sir Robert Norramby is seen holding is the exact same one used by Sailor John and Skiff in Sodor's Legend of the Lost Treasure.


  • In the life lesson segment for this episode, steam emits out of Thomas' whistle at the start, but no sound is heard.

In Other Languages

Language Title
Brazilian Portuguese Coração de Ouro
Dutch Hart van Goud
Finnish Kultainen Sydän
German Ein Herz aus Gold
Italian Cuore D'oro
Japanese トビーのなかみはゆうかん
Polish Złote Serce
Russian Золотое сердце
Spanish Corazón de Oro

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