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“I tried to make the other engines feel better but they were all sure they were going to be replaced.”

World of Tomorrow is the third and final double-length episode of the twenty-fourth series.


Kenji's arrival causes the Steam Team to fear Thomas' original worries, but when a pair of crooks steal the plans for a great new invention, there is a high-speed chase to try and get them back and allow them to prove their worth.






  • Joseph May as Thomas
  • Kerry Shale as Gordon
  • Rob Rackstraw as James, Bernie and Professor Freidrich
  • Christopher Ragland as Percy
  • Jules de Jongh as Emily
  • Yvonne Grundy as Nia
  • Rachael Miller as Rebecca and Dr. Hetty
  • Joe Swash as Sonny
  • Matt McCooey as Kenji
  • Keith Wickham as Sir Topham Hatt, Thomas' Driver and the Policeman
  • Mike Grady as Sir Robert Norramby
  • Dominique Moore as Ruth
  • Bob Golding as Baz
  • Colin McFarlane as Dr. Holyfield
  • Siu-see Hung as Dr. Kim


  • Thomas mentions the events of Big World! Big Adventures! to Kenji.
  • When Thomas' driver lassos the runaway Sonny, it is very similar to Old Iron when the same act was done by an Inspector to rescue a runaway James.
  • This is the first double-length episode set on Sodor not to feature any diesel engines.
  • This episode marks Stanley's only appearance in the twenty-fourth series, and his last appearance to date.
  • This episode is the first production to outright state that Hiro is from Japan.
  • Gordon's worries about being replaced by an electric engine are similar to his worries from the story High-Speed Gordon, the first story from the 31st Railway Series book, Gordon the High-Speed Engine.
  • One of the three times in Season 24 for an engine's crew member to have a speaking role. The other two are Thomas' Fuzzy Friend and Thomas and the Royal Engine.
  • This is the second episode to deal with a magnet after the fifteenth series episode, Stuck on You.
  • Sir Topham Hatt offering Sonny a place on his railway leads into Sonny's Second Chance.
  • This is the final special to run at 22 minutes, as the Series 25 2D reboot marks the return of 1 hour specials.
  • This is the final special to be 3D animated with Maya.


  • After Sir Topham Hatt gets covered in milkshake, Dr. Holyfield's machine mysteriously disappears.
  • During its rampage, the Metal Man leaves no footprints.
  • When the Metal Man gets caught in the magnetic field, it has its back facing towards Thomas, but before it hits the tanker, it flips orientation.
  • After Thomas brakes to slow down Sonny, his wheels keep moving in the subsequent scenes until both engines finally stop.
  • Before the two engines stop moving, their wheels do not spark like in the last shots.
  • After Bernie disconnects the coach, the trees outside Kenji's windows move slower than they are actually going.
  • After Thomas brakes to avoid colliding with Kenji's coach, his wheels keep moving in subsequent shots.
  • Thomas' wheels spin at inconsistent speeds after catching up to Kenji. The Blastbooster-7 also uncouples from him in an undetermined matter.
  • When Kenji bumps Thomas, he makes direct contact with him, but in subsequent shots outside his cab, he has moved farther from Thomas' buffers. This was likely done so viewers could see his face much more clearly.

Home Media Releases



In Other Languages

Language Title
Brazilian Portuguese O Mundo do Amanhã
Italian Il Mondo di Domani
Spanish El Mundo del Mañana

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