Stanley is a silver tank engine who works at Great Waterton.
Stanley was built at Kiston in 1932 and brought to Sodor to take care of Thomas' workload during the restoration of Great Waterton in July 2007. Upon his arrival, Stanley became very popular and enjoyed the company of the engines.
Stanley's popularity caused Thomas to feel jealous and later neglected. Thomas felt that Stanley was newer, bigger, and stronger that him- and would take over his place on the railway. Thomas then planned to make Stanley look weak - the trick backfired and caused Thomas' friends to consider him mean and incompetent.
When Thomas later went missing, Stanley was the first to realise Thomas' feelings. He searched for Thomas until he finally managed to find and rescue him. Then, both became friends and with a combined effort made it back to Great Waterton in time to prepare for the opening celebrations. Stanley later worked in the yards with Thomas and James during the winter and helped with the rebuilding of the Sodor River Bridge.
Stanley is kind and friendly, and became very popular amongst the engines during Thomas' absence. He is a loyal hard worker and is inquisitive of his surroundings. His experience makes him a natural leader.
Stanley is a Kiston 0-6-0ST No. 5474 "Carnarvon".
Stanley is painted silver all over with red wheels and lining. He has an arch shaped face, a red running plate with a dark grey base coat and his name on each side of his saddletank in red with silver writings.
- Matt Wilkinson (UK; Season 15 - Season 18)
- Ben Small (US; Season 15 - Season 18)
- Rob Rackstraw (UK/US; Season 19 onwards)
- ひろし つちだ (Japan)
- Stanley has a very high-pitched two-toned whistle.
- Stanley has three coal bunkers; two at the front of his cab and the other at the back.
- Stanley's smokebox is silver, however in real life, UK locomotives have black smoke boxes.