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Neville is based on a Bulleid "Q1" Engine, and is painted black with the number "33010" on the sides of his cab. When he first came to Sodor, the engines didn't like him. Neville is seen to be a kind and friendly engine, who had the misfortune of being a steam engine who looked like a diesel. Thomas misinterpreted him talking with Arry and Bert, and soon a rumour spread that he was planning to bump the steam engines. Luckily the rumour was rectified, and Thomas befriended with Neville.
Neville made his debut appearance in the ninth season, in only one episode. He later cameoed in the eleventh season.
Neville is based on the SR Bulleid Q1 locomotive, of which where often referred as 'ugly ducklings'.