Stephen, nicknamed "The Rocket", is owned by Sir Robert Norramby and is one of the oldest engines on Sodor.
Stephen is based on Stephenson's Rocket. Though his design is based on the post-Rainhill modifications, Stephen has identified himself as the original Rocket, describing the Rainhill trials and his subsequent working years.
Stephen is painted golden yellow and black. He bears a gold nameplate reading "Rocket". His funnel is painted white with a gold finial and his domes, whistle, exhaust pipes, and boiler bands are bronze.