We first met them in the episode "Duties of The Diesels", when they where sent away after shoving Henry into the back of the shed and shoving Gordon into the sea. Then they made an appearance in Donald Visits The Scrapyard,and then appeared in the seventh season episode,The Final Fate of Spamcan.
The two went into a life of crime, stealing the NW Brakevan and some trucks. These schemes where stopped by Donald, however the two escape into the Old Engine Shed.
When Sir Topham Hatt tooked for the two, he forgets to check the shed. The diesels try to escape, but ram into themselves after taking the wrong track to the Exit of the Railway.
In Season 6, Spamcan tried to cause trouble on the railway after hearing about a "Ghost Diesel". These plans were spoiled by Flying Scotsman, and Spamcan is caught by Sir Topham Hatt.
In Season 7, Class 40 and Spamcan stole Toad and tried to push him into the sea. However, Diesel wanted the credit and shoves the two into the ocean. Bowler and Spamcan floated to the other railway, where Diesel 10 found them. He had them help him take over the railway, and they where givin the job of pulling the express. Later, they helped Diesel 10 trap Thomas and Lady, but they ran away after seeing the breaking bridge.
They where later caught and sent away to the Other Railway via the Magic Buffers.
In season 9 it was revealed that they helped Diesel 10 launch a revolt against the Other Railway controller, which was a success.
Spamcan is based on a diesel from Spamcan's class.
Bowler is based on a Class 40 1Co-Co1. Old Stuck-Up is another member of this class.
Season 1: Duties of The Diesels
Season 3: Donald Visits The Scrapyard
Season 7: The Final Fate of Spamcan
Season 12: The Mystery Train (Bowler only; cameo)
- These diesels appear most out of all the antagonists in his series, other than Diesel, Arry, and Bert.
- Bowler was origanly named Class 40 but this was later changed to Bowler. Spamcan was origanly called Diesel 199.