Air date: October 8th, 2003 (UK), October 16th, 2004 (US)
A small traction engine on rails named Fergus, has been sent to work at the quarry for an important job. Thomas warns him about Bill and Ben, but Fergus tells him that he will not let the twins bother him.
When Fergus arrives, Mavis tells him that the trucks are in a mess, but Fergus promises to sort them out. But Bill and Ben are full of mischief, and decide to have some fun. Bill slams his trucks very hard, causing some of his load to fall onto the tracks. Fergus angrily orders him to do it right, but Bill is annoyed and tells him not to interfere. Later, Ben pushes his trucks across some points, so that Fergus cannot leave his siding. He orders Ben to move them, but Ben just grins.
The workmen are blasting rock, so Fergus tells the twins to wait for the all clear signal. But they are fed up with his orders, and crossly tell him to keep his funnel out of the quarry. Then they leave to collect a rock crusher from the docks, leaving Fergus in peace with Mavis.
At the docks, the twins are still grumbling about Fergus. They decide that the next time he tells them to do it right, they will do it wrong intentionally. Bill and Ben collect the rock crusher and head back to the quarry.
When they arrive, Fergus warns them that the rock face is unsafe, and not to go near it. But Bill and Ben deliberately push the rock crusher alongside the cliff as roughly as they can, which starts a rockslide. Fergus charges forward and pushes the twins out of the way. His driver jumps clear, but Fergus ends up buried. Everyone works hard to dig Fergus out, and no one works harder to help him than Bill and Ben.
When Fergus is free, Bill and Ben shamefully apologise. Fergus accepts their apology, and all three agree to do things right together.
Tropes featured in the episode:
- Bratty Half Pints: Bill and Ben much to Fergus' annoyance.
- Character Catchphrase: Fergus' "Do it right!" which irks Bill and Ben.
- Early-Bird Cameo: Arthur makes a cameo appearance before his introduction in "The Spotless Record" six episodes later.
- Heroic Sacrifice: Fergus pushes Bill and Ben out of the way and ends up buried in rocks.
