Oliver is a tank engine who was saved from scrap by Douglas. He has his own brake-van, Toad.
Oliver worked on the Great Western Railway. Sometime during the 1960s, he ran away for fear of being scrapped with his breakvan named Toad. The two were forced to hide between signalboxes and rely on the goodwill of signalmen to pass at safe times. When control got wind of the runaways, they hid in an old quarry branch and had the cutting blocked by rubbish to avoid being spotted by the diesels outside. The runaways decided it was safe to leave at some point, but before they could reach the greener pastures of Sodor, Oliver ran out of coal. Luckily, Douglas was able to rescue Oliver and took him to Sodor, taking him to Crovan's Gate Works. The Fat Controller soon found out and arranged for the two to be repaired and painted in Great Western colours.