Bash and Dash are a pair of characters from Thomas the Tank Engine and Friends. They are two small twin engines who like to finish each other's sentences. They used to work the railway on the mainland, but they caused too much trouble and were sent to the railway on Misty Island, where they became "Logging Locos" along with Ferdinand. They are the third pair of engine twins (excluding 'Arry and Bert, who were never specified as "twins", just "brothers"). Bash and Dash are based on a type of geared engine known as a "Gypsy," built and operated in California. These engines were used in the logging industry for yarding. While a real Gypsy's gears are mounted in front of the smokebox Bash and Dash's gears are mounted in the rear of their bunkers. Bash and Dash are both coloured golden yellow and grey.

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