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John Hasler (born 21 April 1974) is an English actor and voice actor, who is best known as T-shirt in the children's television series T-Bag from 1985–92. Hasler was the only character to remain with the show for its entire television run, starting as a young boy and leaving as a teenager, he's also known for voicing Thomas the Tank Engine in the UK dub of the children's television series Thomas & Friends.

John Hasler
Born (1974-04-21) 21 April 1974 (age 45)
OccupationActor, voice actor
Years active1984–present
Notable work
Fireman Sam
Thomas & Friends


John began his career in the mid 80's. He played T-Shirt, a prominent character in the T-Bag TV series between 1985-1992, being the only character to star in all 9 series and in all 4 Christmas special.

He has appeared in Renford Rejects and Casualty and provided voices and additional dialogue replacement (ADR) for a number of TV, radio and film productions. He also appeared for an old TV advert for Persil washing powder in the 90's.

In 2012 he joined the voice cast of Fireman Sam as James Jones, taking over the role from Steven Kynman and Arnold McKinley.[1]

From August 2012 to February 2015, Hasler was cast in the United Kingdom tour of Disney's The Lion King (musical), performing as the meerkat Timon. [2]

From 2015 onwards, he is the replacement voice actor of Thomas the Tank Engine in the UK and Rheneas in the UK and US narrations of Thomas & Friends, after Ben Small left the show.[3] He also voices the lead character Trafalgar on Teenage Fairytale Dropouts, "Toot the Tiny Tugboat", and Foz in "Go Jetters".



Year Title Role(s) Notes
1984 Breakout Stephen
2011 10 Areans of Marwood Irving Clifford
2012 Brave Additional voices
2014 Fireman Sam: Heroes of the Storm Arnold McKinley, James Jones UK voice
2015 Thomas (the Tank Engine) & Friends: The Adventure Begins Thomas
Sodor's Legend of the Lost Treasure
2016 Thomas & Friends: The Great Race Thomas (UK)
Voice; uncredited in the US
2017 Fireman Sam: Alien Alert Arnold McKinley, James Jones UK voice
Journey Beyond Sodor Thomas
2018 Big World! Big Adventures!


Year Title Role Notes
1985–92 T-Bag T-Shirt
1991 Doctor at the Top Alec 1 episode
1994 Harry's Mad Access 1 episode
1995 The Legends of Treasure Island Jim Hawkins Voice; 13 episodes (Series 2)
2000 Casualty Lee Carter
2012–present Fireman Sam James Jones, Arnold McKinley Main UK voice role
2013–14 Teenage Fairytale Dropouts Trafalgar Main voice role
2014 Toot the Tiny Tugboat Toot
2015–present Thomas & Friends Thomas / Narrator (UK)
Main voice role, succeeding Ben Small
Go Jetters Foz Main voice role
2019-present Think about Lesson   Pet Supporting voice role


  1. ^ "John Hasler - Actor and Voiceover Artist". Retrieved 2019-06-27.
  2. ^ "The Lion King Roars Off On First-Ever U.K. Tour". Encore Tickets. Retrieved 2019-06-27.
  3. ^ "John Hasler - Actor and Voiceover Artist". Retrieved 2019-06-27.

External linksEdit