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“It's a good thing you steamers don't use diesel!”
―Miss Jenny to Isobella

Mud Glorious Mud is the thirteenth and last episode of Jack and the Sodor Construction Company.


The Pack are digging foundations for the new dairy barn, but one by one they start to run out of diesel and become stuck. The lorry that was about to deliver the needed fuel breaks down, so Thomas is told to deliver the fuel to Isobella at Cronk. It is then up to Isobella to deliver the fuel to the site and get the rest of the Pack up and running.




  • The title is a line from the chorus of the popular Flanders and Swann song, The Hippopotamus. The line was previously said by Alfie in A Happy Day for Percy.
  • This was the last episode of several things:
    • The last episode of Jack and the Sodor Construction Company.
    • The last episode devised and produced by Phil Fehrle and Gullane Entertainment.
    • The last episode written by Jonathan Trueman.
    • The last episode to have a run time of four minutes and thirty seconds.
    • Isobella's and Byron's last appearances, as well as the last time until he is indirectly mentioned in Mines of Mystery that Byron is acknowledged, not counting his indirectly mentioned appearance.
    • The last appearances of the Pack and Miss Jenny until the special The Great Discovery.
    • The Pack's last leading roles until the twentieth series episode, Mucking About.
    • The last appearance of Cronk, though it would later be mentioned in Gordon Runs Dry.
  • This is the only Jack and the Sodor Construction Company episode where Gordon, Salty and Trevor appear.
  • The plot is similar to the cancelled episode of this series, Pop Goes the Diesel.


  • When all the machines run out of fuel, Byron is seen looking happy behind Jack.
  • During the very first shot of the Pack, the scene is sped up. But as Alfie is seen leaving, the scene suddenly slows down and reverses for a second.
  • The narrator says that water was up to Isobella's axles, but the water barely reached her tyres.
  • Despite all of the machines running out of fuel, Oliver's bucket arm moves right as the camera cuts when the narrator says, "By now, all Mrs. Jenny's machines were out of fuel."
  • When Isobella arrives with the fuel drums, the mud on Alfie's chassis is dry but the mud on the other machines was wet.
  • When the narrator says "The site had never been so quiet," Oliver and Max are smiling, even though Oliver was sad in the last shot.

In Other Languages

Language Title
Dutch Isobella Warboel Door
German Die Schlammschlacht

Home Media Releases


UK DVD Boxsets

AUS DVD Boxsets