|Occupation: The Duke and Duchess of Boxford's Private Engine|
|First Appearance: Gordon and Spencer|
| Performer: Matt Wilkinson (UK)|
Glenn Wrage (US)
Spencer is a large streamlined tender engine from the Mainland, who is privately owned by the Duke and Duchess of Boxford.
Spencer, a sleek and shiny silver express engine, was brought to the Island as the private engine of the visiting Duke and Duchess.