Den

"Well, what I mean to say is..."

- Den thinking about what he's going to say before Dart interrupts him.

   Den   Den runs the Sodor Dieselworks with Dart.
 * Designer: Rolls Royce Sentinel
 * Builder: Rolls Royce Sentinel
 * Configuration: 0-4-0

Bio
In Day of the Diesels, Den and Dart take Thomas to the back shed of the Dieselworks while Percy, Diesel 10, and the other Diesels take over the Steamworks.

In the fifteenth season, he, along with Dart and Diesel, tried to find a Christmas tree for the Dieselworks whilst in competition with the steam engines. Den later teased Flynn for spraying the Fat Controller and Gordon.

In the seventeenth season, along with Den, tell the instructions to Sidney, Paxton and Norman to be in charge of the Dieselworks

Persona
Den is the Diesel who runs the Dieselworks, when Diesel 10 is not around. He is very thoughtful and thinks hard before he speaks. When Den does speak, it is very slowly. This gives the appearance that he may be a little slow, but nothing could be further from the truth. Engines can wait a long time for Den to give his insight, but it is worth the wait.

Basis
Den is a Rolls Royce Sentinel Diesel-Hydraulic 0-4-0.

Livery
Den is painted slate grey and orange with cream lining. His buffer beams are painted with orange and black wasp stripes. He has the Sodor Dieselworks logo on each side of his cab.

Television series

 * Season 15 - Stop that Bus! (cameo), Stuck on You (cameo), Tree Trouble, and Fiery Flynn
 * Season 16 - Ol' Wheezy Wobbles, Thomas Toots the Crows, and Bust My Buffers

Specials:
 * Day of the Diesels

Voice Actor

 * Keith Wickham (UK/US; Day of the Diesels onwards)

Merchandise

 * Wooden Railway
 * Take-n-Play
 * TrackMaster
 * Mega Bloks