Alfie is a green excavator who works for the Sodor Construction Company.
Alfie was purchased by Jenny Packard before his soon-to-be-best friend Jack, whom he met while working at the quarry. The two eventually became good friends after Max roared pass them, and Jack managed to tell him to stop bullying. When Miss Jenny allowed Jack to be a part of her crew, Alfie was delighted.
Alfie is a friendly machine who gets on well with his work and never minds getting dirty or mucky during jobs.
Alfie is painted green with the number "12" painted on his sides and on the back of his cab in white.
- Season 1 - Scruff the Scrapper (cameo) and Fergus and the Small Engines
- Season 2 - Disappearing Diesel, The Return of Boulder, Jack and the Quack, Sodor Day (cameo), Pile Driver Pedro, Pedro Deep Down, Truck Trouble, A Treasury Christmas (cameo), and Ministry