Thomas the Tank Engine Wikia

John Hasler (born in Barking, London, England, on 21st April 1974) is an English actor and voice actor who joined the English voice cast of Thomas & Friends in The Adventure Begins. 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", "Teenage Fairytale Dropouts", "Go Jetters", "The Legends of Treasure Island", and two of HiT Entertainment's other shows; "Mike the Knight" and "Fireman Sam".

Hasler left the series after production ended on Series 24, though he still continues to voice Thomas for the official YouTube channel shorts and other promotional material.




Online videos and additional content




  • 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)
  • Fireman Sam: Heroes of the Storm (2014)
  • Thomas & Friends: The Adventure Begins (2015)
  • Thomas & Friends: Sodor's Legend of The Lost Treasure (2015)
  • Thomas & Friends: The Great Race (2016)
  • Fireman Sam: Alien Alert (2017)
  • Thomas & Friends: Journey Beyond Sodor (2017)
  • Here comes the Grump (2018)
  • Thomas & Friends: Big World! Big Adventures! (2018)
  • Fireman Sam: Set For Action! (2018)


  • 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)
  • Awesome Magical Tales (2013-2014)
  • Toot the Tiny Tugboat (2014)
  • Thomas & Friends (2015-2021)
  • Go Jetters (2015-present)


  • He and his family attended the Blue Carpet premiere events of Sodor's Legend of the Lost Treasure on 12 July 2015, The Great Race on 22 May 2016 and Big World! Big Adventures! on 7 July 2018.
  • As a child actor, Hasler co-starred in Breakout along with Simon Nash, who voiced Ten Cents in TUGS.
  • Hasler is the second UK narrator to voice a character after Mark Moraghan, and the third overall after Michael Brandon and Mark Moraghan.
  • Since 2018 when Thomas became the new narrator, Hasler has been the only UK cast member to date not to narrate an episode for the US dub. Due to the twenty-fourth series being the final series of Thomas & Friends, he and Joseph May are the final narrators for the series in the UK and US dubs, respectively.
  • He and Pierce Brosnan are the only UK narrators not to be from Liverpool.


External Links