Stafford is a battery-electric shunting engine who works at Knapford Yards.
Stafford was brought to Sodor to help with shunting, and Spencer was given the job of showing him around. However, Stafford's battery went out three times, but Spencer did not notice this and was rude to him. Eventually, Spencer ran out of coal, and Stafford shunted him to Knapford. There, the Fat Controller told Stafford he was a really useful engine and welcomed him to Sodor.
Stafford is a humble, courteous little chap with a Yorkshire accent. He is a very different sort of engine from any other on the Fat Controller's railway. This is because Stafford is an electric battery engine; he is not a steam engine or a diesel engine. Stafford is fueled by recharging his battery, which needs to be done frequently so he can go about his work as a shunting engine. Stafford is very patient, calm, and mannerly. He does not let the antics of the bigger, haughtier engines bother him too much, keeps level-headed as he goes about his day, and brushes off any troubles without much fuss. He is more than content with taking things slow and not having to travel long distances and he is more than proud to work on the Fat Controller's railway.
Stafford is made of veneered wood with yellow lining. The number "1917" and gold nameplates are on his sides.
- Season 1 - Percy's Oil Spill (cameo), Splatter and Dodge, Henry the Warrior (cameo), The Great Western Way (cameo), and Big Strong Murdoch (cameo)
- Season 2 - Unique Engines, The New Controller (does not speak), Long Lost Twins (cameo), Sodor Day, and Trapped in Tidmouth (cameo)
- Stafford is the first electric engine introduced in the television series and the first ever named.
- Stafford's number comes from the year his basis was built and his name comes from where his basis worked.
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