Dennis

"...I'm a really lazy engine..."

- Dennis, Thomas' Day Off, ninth season

Dennis is a lazy diesel shunter.

Thomas & Friends
When Dennis was new to the railway, he tried to take advantage of Thomas. He soon learnt his lesson when he reversed into a ditch. With Thomas' help he was able to finish his work and promised to be a Really Useful Engine from now on.

In The Great Discovery, Dennis and a number of other diesels waited in the quarry yard to hear if Thomas had been found in the days leading up to the reopening of Great Waterton.

Personality
Dennis is considered to be a very lazy diesel who tries to take advantage of others and depend on them to do his work. Dennis will often create excuses to get out of work, but usually gets caught in his lies, and always says sorry - but whether or not he means it is the question.

Basis
Dennis is based on No. 11001, a prototype Bulleid diesel built at Ashford Works, England in 1949 and scrapped in 1959. He also carries his basis' number. Norman is also a member of this class.

Livery
Dennis is painted grey with dark grey wheels, gearboxes, roof and front. The number "11001" is painted on his sides in white.

Appearances
Television Series=

Thomas & Friends

 * Season 9 - Thomas' Day Off

Specials

 * 2008 - The Great Discovery (cameo)

Music Videos

 * There's Always Something New

Learning Segments
Other Media= {{Scroll box|
 * Season 10 - Diesels and Steamers (cameo)
 * Season 12 - Thomas' Favourite Friends - Neville and Dennis

Books

 * 2007 - Dennis
 * 2009 - Trainloads of Fun and Watch Me Draw Thomas & Friends
 * 2011 - The Big Book of Engines and The Ultimate Diesel Guide
 * 2012 - Full Steam Ahead!
 * 2015 - Thomas the Helpful Engine
 * 2018 - Character Encyclopedia (mentioned)

Magazine Stories

 * 2006 - Dizzy Dennis, Justice for James and The Lazy Diesel
 * 2007 - Easy for Edward
 * 2008 - Come Back, Please!
 * 2011 - Salty's Surprise!
 * 2012 - Bubbling Boiler (cameo)

Dennis also appeared in the magazine stories, Diesel Display, Do-Nothing Dennis, and Speedy Dennis.

Video Games
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 * 2008 - Begins Educational Learning
 * Dennis also appeared in DVD Bingo.

Voice Actors

 * Tsutomu Densaka (Japan)

Trivia

 * According to a magazine article, he lives at the Vicarstown Dieselworks with Diesel 10.
 * He has a brother named Norman.

Merchandise

 * Wooden Railway (discontinued)
 * Take Along (discontinued)
 * Take-n-Play (discontinued)
 * Motor Road and Rail (discontinued)
 * TrackMaster (discontinued)
 * My Thomas Story Library (discontinued)