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This article is about the episode. You may be looking for the steam engine or the Story Library book.

“I'm Mighty!"
"And I'm Mac!"
"And together we're Mighty Mac!”
―Mighty Mac

Mighty Mac is the fourth episode of the ninth series.


During the height of the busy Summer season, the Thin Controller purchases a new engine for his railway. Thomas meets the new engine at the Transfer Yards and the new engine reveals himself as Mighty at one end and Mac at the other. Thomas is surprised as he has never seen such an unusual engine before. Just then, the Thin Controller tells Mighty Mac to take holidaymakers to the campsite in the mountains. However, there are many tracks between the passengers and Mighty Mac, who are nervous as they were used to working in the shunting yards. Thomas advises them to look where they want to go and follow the track that will take them there. Mighty sets off, but then Mac takes the lead, thinking his way is quicker. As Mighty Mac fight over who should take the lead, they end up going in all sorts of directions, even going on the turntable until they get dizzy. As a result of their leadership battle, they end up back where they started and nowhere near the holidaymakers at all, making the Thin Controller very cross.

Eventually, Mighty Mac sets off with the holidaymakers. However, their feud is far from over as they argue at junctions on which way to go. Mighty pulls one way and then Mac pulls the other. All of this is making an uncomfortable ride for the holidaymakers, and they end up at a dead end. The holidaymakers are cross and Mighty and Mac blame each other and get into a fight. This results in an accident, as they push the coach off the rails and into a giant, solid rock on a bottom cliff of the mountain. This triggers a rockslide, and it blocks their path. Mighty and Mac now realise how silly they have been. And that they were to blame.

The holidaymakers set to work to getting their coach back on the rails and soon it is back on track. Impressed by this, Mighty Mac work together to shift the rocks out of the way and then collect their coach. They see the flag of the campsite high above them. Remembering Thomas' advice, they set off for the campsite. After they bring the holidaymakers to the campsite, Mighty and Mac set off for home. Mighty and Mac both agree that working together makes them a Really Useful Engine.




  • This episode marks the first of six things:
    • Skarloey, Peter Sam and Duncan's first appearances since the seventh series episode, Trusty Rusty.
    • The first appearance of the Skarloey Railway, its engines and its rolling stock in the HiT Entertainment era.
    • The first appearance of the Thin Controller/Mr. Percival in the television series, both in-person and as controller of the Skarloey Railway.
    • The first episode since the fifth series episode, Snow, where the standard gauge engines interact with the narrow gauge engines.
    • Mighty Mac's first and only roles as leading characters.
    • The first appearance of Thomas' Gauge 3 model.
  • Two British railway posters are seen in the coach. One for "Coronation Scot" on the LMS and one for "Battle of Britain" on the Southern Railway. A Battle of Britain class would later appear in the twenty-second series in the form of Rebecca.
  • Mighty Mac is notably referred to as "they" several times throughout the episode in contrast to later episodes in which the narrator treats them as one engine.
  • The camp flag is actually a signal flag which means "Man Overboard!"
  • In a deleted scene passengers are seen with the bodies of Cyril the Fogman and Old Bailey.
  • In the Dutch dub of this episode, stock footage from Thomas and the Rainbow was used at the beginning.


  • Right before the coach derails and smashes into the rock, the track Mighty Mac is on has been moved so it can lead straight into the cliffside.
  • Throughout the episode, Mighty Mac's steam platform can be visible. First before they stopped and Mac wanted to go the other way, it can be seen for a brief second. When Mac forces Mighty to go left at a set of points, the steam platform is visible after they puffed away. Before they came up to another set of points, two of their steam platforms are clearly visible. When they arrive at the dead end, their steam platform can be seen just before they stop.
  • In the shot of the holiday maker with a bun on his head, some studio equipment can be seen reflected through the left window.
  • When Mighty Mac approach the platform, Thomas' eyes are wonky.
  • While trying to figure out how to get to the holiday makers, the camera jolts in some scenes, which indicates film cuts.

In Other Languages

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Language Title
Arabic مايتي ماك
Brazilian Portuguese Mighty Mac
Chinese Mandarin 麦帝麦克
Croatian Moćni Mak
Czech Silák Mac
Danish Mighty Mac
Dutch Jut en Jul
Finnish Mahti Max
French Super Mac
German Wo geht’s lang?
Hungarian Mighty és Mac
Italian Super Mac
Japanese マイティマック
Korean 고집불통, 마이티 맥
Latin American Spanish Mighty Mac
Norwegian Mektige Mac
Polish Mocny Maciek
Romanian Mighty Mac
Russian Майти и Мак
Scottish Gaelic Einnsean Air Leth
Spanish Mac el Grandioso
Swedish Stark Adolf
Turkish Güçlü Mac


Home Media Releases


DVD Packs


US DVD Boxsets



  • The Complete Series 9

DVD Boxsets






DVD Boxsets