Den is a big hydraulic diesel engine who runs the Vicarstown Dieselworks alongside his best friend and assistant Dart. During Diesel 10's takeover of the Sodor Steamworks, Den and Dart took Thomas and Kevin to the Back Shed, but released them after the Dieselworks caught fire.

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Den is a big diesel-hydraulic engine who runs the Vicarstown Dieselworks with his assistant, Dart. Den was purchased to help run the newly-built dieselworks at Vicarstown with his companion, Dart.

Den is a big diesel-hydraulic engine who runs the Dieselworks with his assistant, Dart. In Day of the Diesels, Den and Dart took Thomas to the back shed of the Dieselworks while Percy, Diesel 10, and the other Diesels took over the Steamworks.

Den is a fictional standard gauge diesel-hydraulic locomotive created by Sharon Miller and Ian McCue. In 2011, Den made his debut in the special, Day of the Diesels. Den is voiced by Keith Wickham (UK/US) in the CGI version of the series on both sides of …

Den and Dart: Directed by Dianna Basso, Don Spencer. With Mark Moraghan, Teresa Gallagher, John Hasler, William Hope. Mavis is sent to the dieselworks for repairs and Den is ordered to take her place at the quarry. He's nervous about working there without his best friend Dart.

Den, the stately and dignified diesel shunter from "Thomas & Friends," is a character brimming with unique qualities and endearing traits. Painted in a dark blue livery, Den exudes a sense of reliability and thoughtfulness that makes him an indispensable part of the Vicarstown Dieselworks on the Island of Sodor.

Den is an orange and dark blue sentinel diesel shunter who works at the Vicarstown Dieselworks. Den is the diesel engine who runs the Vicarstown Dieselworks, repairing other diesels.

Den is a big diesel-hydraulic engine who runs the Vicarstown Dieselworks with his assistant, Dart. In the fifteenth season, he, along with Dart and Diesel, tried to find a Christmas tree for the Dieselworks whilst in competition with Thomas.

Den is a big diesel-hydraulic engine who runs the Vicarstown Dieselworks with his assistant, Dart. Once, Den and Dart took Thomas to the back shed of the Dieselworks while Percy, Diesel 10, and the other Diesels took over the Steamworks.