This article is about the episode. You may be looking for the Philippine DVD or the Swedish DVD.
"That's me, the world's strongest engine!"
— Diesel

The World's Strongest Engine is the eleventh episode of the sixth season.


Henry has had an accident pulling a goods train and is sent to the works to be mended, and unfortunately Diesel is the only spare engine available. The engines are not very happy about this, seeing that they know Diesel is troublesome.

The next day, as Diesel is working at the docks, he brags to the trucks that when Sir Topham Hatt sees how good he is at shunting trucks, he will get rid of steam engines once and for all. The trucks tease Diesel as he is shunting them, saying how Henry can shunt more trucks than he is, so he boasts he can push them all at the same time. Diesel then arranges a line of twenty trucks, but soon finds he is unable to move them (unbeknownst to him, a shunter has put the brakes on), so Diesel decides to pull them instead. He pulls so hard that he breaks loose and falls off the quay and onto a barge. Henry, who is now repaired, arrives at the docks with The Fat Controller. He's cross with Diesel and sends him home in disgrace.

Henry then pulls away from the docks, pulling the line of trucks easily and the engines all agree that even trucks can be helpful sometimes, like helping to get rid of Diesel.




  • S. S. Vienna from TUGS can be seen.
  • This episode may have been inspired by Showing Off.
  • This marks the second time Diesel tried to pull trucks with their brakes on, the first being his debut.
  • This episode marks several things for Diesel:
  • In the UK version, this is the first time Diesel refers to the Fat Controller as such. In previous episodes, he would correct himself by calling him Sir Topham Hatt.


  • In the first scene, Clarabel is facing the wrong way.
  • One of the workmen who comes to rescue Henry is tilted.
  • At Tidmouth Sheds, the buffers behind Thomas are resting on top of the rails.
  • When Diesel pushes the trucks back, his side rods are going forwards.
  • Diesel starts with three trucks and adds four more, but the narrator says he starts with five.
  • After shunting the trucks, Diesel runs on the third line, but he should have travelled on the first line; the next scene shows the third line is blocked by the trucks.
  • After the trucks shout "Push! Push! Push!", steam is seen going into Thomas, indicating reversed footage.
  • When the camera moves with Diesel a wire is visible on his coupling.
  • As the trucks laugh, they are not in the formation that Diesel arranged them, but as they were before jeering at Diesel.
  • Diesel falls off the quay face-first, but lands back-first.
  • When the Fat Controller looks down at Diesel, there appears to be a rip in his suit.
  • In the shot where Diesel's teeth were shown and his eyes are looking left to right you can see that his face is moving.
  • Oliver and Duck have the same whistle sound.
  • During the final scene with Thomas and Percy, both of their roofs are crooked.
  • When the narrator says "fifteen" Diesel jumps backward from one spot to another, indicating a film cut.
  • When the trucks sing "Push us all, that's the longest!", the cattle truck has a dented roof.
  • When Henry leaves the docks, the leading two trucks are cattle trucks, even though two vans were in front of them when Diesel had shunted them all together.
  • In the first shot of Diesel at Brendam, he passes the cruise ship moored at the docks. But in the next shot, he passes it again. Also the trucks are arranged differently in the two shots.
  • Thomas is smiling during close-ups of him as Diesel shunts the trucks, but in long shots he looks suspicious.


In Other Languages

Language Name Meaning
Norwegian Verdens sterkeste lokomotiv The World's Strongest Engine
Danish Verdens stærkeste lokomotiv The World's Most Powerful Engine
Japanese せかいさいきょうのきかんしゃ The World's Strongest Engine
Slovenian Najmočnejša lokomotiva na Svetu The Most Powerful Locomotive in the World
Polish Najsilniejsza Lokomotywa na Świecie The Most Powerful Locomotive in the World
Italian La Locomotiva più forte del mondo The World's Strongest Engine
Russian Самый сильный паровоз The Most Powerful Locomotive
Chinese 世界上最强大的火车 The World's Most Powerful Train
Korean 망신 당한 디젤 Diesel Suffered the Embarrassment
Romanian Cea Mai Puternică Locomotivă Din Lume The Most Powerful Locomotive in the World
Slovak Najväčšia svetová lokomotíva The World's Largest Locomotive
Hungarian A Világ Legerősebb Mozdonya The World's Strongest Locomotive
Finnish Maailman Vahvin veturi The World's Strongest Engine
Swedish Världens starkaste lokomotiv The World's Most Powerful Engines
Thai หัวรถจักรดีเซลหมดพลัง Diesel Engine Exhaust the Power

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