Rexportrait by wildnorwester-d7npdxo
Railway Series Portrait
Vital statistics
Position Arlesdale Railway engine
Age 88 (as of 2011)
Arrived on Sodor Unknown
Status Operational
Physical attributes
Height Not stated
Weight Not stated

Rex is a green tender engine who works on the Arlesdale Railway. He was built in 1923. 


Rex told Bill and Ben about the Arlesdale Railway and its engines. He also told them about Diesel's angry behavior. On the day before the grand opening of the Arlesdale Railway, Rex and Bert was ordered by the Small Controller to take passenger trains. He was later told by Sarah the historian about Duke and what happened to him when the Mid Sodor Railway closed down. Rex later offered help when James' line was blocked by a tree, but the offer was rejected by Sir Charles Topham Hatt. He was later told about the famers' produce of wool. He later talked to Barry when he was collecting a train of ballast. He talked to Mike at the shed about Olivia before the green tank engine said about Sir Walter's own children having a disinterest to the estate railway.

In Cold Reception, he was told by Bert about Olivia's anger and Jane Albworth before the green tender engine spoke to Olivia about the woman at a lead mine where he was helping out with some construction work there before Olivia had arrived.

In Storm Damage, he, Olivia, Frank and Blister 2 were talking about the aforementioned storm, and how they couldn't contact Bert, Mike, Jock, Blister 1 and Sigrid. They also bring up The Old Mill and Atlas in conversation, not knowing they were one in the same.

In The Devious Way, Donald talks to Rex about how the ballast hoppers run smoothly on the small railway, and wishes they could be the same on the big railway.


Rex is based off the Ravenglass and Eskdale Railway's River Esk.



Cancelled Episodes

Voice Actor


  • In STEY, Rex was represented by the SI3D 2006 model. For STMY, he has a new model built according to the blueprints of his basis, River Esk.