John Hasler (born in London, England, UK, April 24th, 1974) is a British actor and voice actor who joined the cast of Thomas and Friends in 2015. He took over the roles of Thomas and Rheneas from Ben Small.

Hasler is best known for his appearance as T-Shirt in the children's TV series T-Bag. Other credits include "Gnomeo and Juliet" (animated by Arc Productions), "Toot the Tiny Tugboat", "The Legends of Treasure Island", and two of HiT Entertainment's other shows; "Mike the Knight" and "Fireman Sam".





  • Never Overlook A Little Engine (performed)
  • We Wish You a Merry Christmas (performed)
  • Will You Won't You (performed)
  • Streamlining (performed)
  • You Can Only Be You (performed)
  • Be Who You Are, and Go Far (performed)



  • Breakout (1984)
  • Brazil (1985)
  • T-Bag's Christmas Carol (1989)
  • T-Bag's Christmas Ding Dong (1990)
  • T-Bag's Christmas Turkey (1991)
  • 10 Arenas of Marwood (2011)
  • Storage 24 (2012)
  • Brave (2012)


  • Wonders in Letterland (1985)
  • T-Bag Strikes Again (1986)
  • T-Bag Bounces Back (1987)
  • Turn on to T-Bag (1988)
  • T-Bag and the Revenge of the T-Set (1989)
  • T-Bag and the Pearls of Wisdom (1990)
  • T-Bag and the Rings of Olympus (1991)
  • Doctor at the Top (1991)
  • T-Bag and the Sunstones of Montezuma (1992)
  • Take Off with T-Bag (1992)
  • Against All Odds (1994)
  • Harry's Mad (1994)
  • The Legends of Treasure Island (1995)
  • Casualty (2000)
  • Renford Rejects (2000)
  • Fireman Sam (2012-present)
  • Teenage Fairytale Dropouts (2013-2014)
  • Toot the Tiny Tugboat (2014)
  • Thomas & Friends (2015-present)
  • Go Jetters (2015-present)


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