John Hasler (born 21 April 1974) is an English actor. He is best known as T-Shirt in the children's television series ''T-Bag'' from 1985 to 1992, and for voicing Thomas the Tank Engine in the UK dub of the children's television series ''Thomas & Friends'' from 2015 to 2021. Hasler was the only cast member on T-Bag to remain with the show for its entire television run, starting as a young boy and leaving as a teenager. He has a child, Alice.
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