Thomas is a small blue tank engine. He has come to Sodor in May 1915 as a station pilot at Vicarstown until 1946, at which time he has been transferred to Wellsworth following an incident with some trucks. Later that year, after rescuing James from his crash, he has been given charge of the Knapford-Ffarquhar branch line and two coaches, who he names Annie and Clarabel. He is the main protagonist of the television series.
- Home: Island of Sodor
- Train Built: Steamie
- Personality: Cheeky, goofy, funny, kind, friendly, clever, honest, determined, brave, smart, cute, wise, stubborn (sometimes), mischievous (sometimes).
- Appearance: Blue tank engine with 6 wheels, black smokebox, red chassis, black buffers, grey face, yellow portholes and white lamp, red lines around his sides, coal bunker and boiler, wheel arches, yellow No. 1 on both his sides.
- Goal: To be a really useful engine (upon every episode of the Television series). Help Mr Conductor get more magic and help protect Lady from Diesel 10 (in Thomas and the Magic Railroad).
- Occupation: The Fat Controller's No. 1 engine, Percy's best friend, shunter and branch line engine.
- Numbers: 1.
- Gender: Male.
- Alignment: Good.
- Allies: Edward the Blue Engine (father), Henry the Green Engine (uncle), Gordon the Big Engine (uncle), James the Red Engine (cousin), Percy the Small Engine (best friend), Toby the Tram Engine, Duck the Great Western Engine, Donald and Douglas the Scottish Twin Engines, Oliver the Great Western Engine, Emily the Beautiful Engine (girlfriend/wife), Murdoch the Strong Engine (uncle), Arthur the LMS Tank Engine (brother), Spencer the Silver Engine (sometimes), Mavis the Quarry Diesel, BoCo the Metropolitan Vickers Diesel, Bill and Ben the Saddle Tank Engine Twins (good friends and pals), Fergus the Railway Traction Engine, Annie and Clarabel, Old Slow Coach, Stanley, Stepney (son), Bertie, Terence, Butch, Trevor the Traction Engine, Caroline, Harold, Skarloey, Rheneas, Sir Handel, Peter Sam, Rusty, Duncan, Duke, Freddie, Mighty Mac, Luke, Bertram, Ivo Hugh, Molly the Yellow Engine (mother), Rosie, Lady (beautiful magical friend/second girlfriend), Belle (beautiful friend), Millie, Stephen, Bash, Dash, and Ferdinand the Logging Locos, Hiro (grandfather), Flynn, Connor, Caitlin, Stafford, Winston the Red Car, Victor, Kevin the Crane, Dennis, Charlie the Purple Engine, Billy, Salty, Porter, Harvey, Elizabeth (sometimes), Cranky (sometimes), Jack, Alfie, Oliver the Excavator, Kelly, Ned, Buster the Steam Roller, Nelson, Paxton, Neville, Captain, Owen, Merrick, Hank, Flora, Pip and Emma, Jinty and Pug, Green Arrow, Iron Duke, Wilbert the Forest Engine, City of Truro
- Enemies: Devious Diesel, 'Arry and Bert, Daisy, Diesel 10, Splatter and Dodge, Stanley (formerly), Spencer the Silver Engine (sometimes), Elizabeth (sometimes), Cranky (sometimes), Bulgy, George, Max and Monty, Den, Dart, Norman, Paxton (only in Day of the Diesels), Sidney, D261, The Horrid Lorries, S.C.Ruffey, Troublesome Trucks
- Likes: Being a Really Useful Engine, working on Sir Topham Hatt's Railway, being Sir Topham Hatt’s No. 1 engine, dreaming of seeing the world, Emily, being nice to his friends, Annie and Clarabel, his friends, Rosie, people and engines who are friendly to him, Lady, working on his branch line, racing, playing tricks on the other engines, blaming other engines and people (sometimes), Ashima, shunting trucks, Spencer being nice to him and his friends, saying that it’s not his fault (always), being happy, being angry (sometimes), being rude to other engines and people (sometimes).
- Dislikes: Causing confusion and delay, not being a Really Useful Engine, being late, Diesel 10, people and engines who are mean to him, Devious Diesel, his snowplough (formerly), danger, Diesel telling him that Sir Topham Hatt will scrap all of the steam engines, the smell of fish, Rosie annoying him, Billy calling him a bossy engine, not working on his branch line, being banished from his branch line, other engines pulling Annie and Clarabel (sometimes), Sailor John, Vinnie, Frieda, being trapped in the Steelworks on the Mainland, anyone mad at him, Cranky being cranky, Spencer being rude to him and his friends.
- Powers and abilities: Fire, steam, strength and speed.
- Edward Glen (Thomas and the Magic Railroad)
- Martin Sherman (US; 2009-2015)
- Joseph May (US; 2015-present)
- Ben Small (UK; 2009-2015)
- John Hasler (UK; 2015-present)
He played Jimmy Gourd in Eli WagesTales Edit
He plays Casey Junior Played in Sonic and Tails (AKA Dumbo), Lumpy a.k.a Dumbo, Ana (Dumbo) and Peugy (Dumbo)Edit
He is a Circus Train
He plays The Magic Carpet in Jacob Samraladdin and More!Edit
He is a Flying Carpet
He plays Maurice (Beauty and the Beast) in Beauty and the Queen Elsa of Arendelle (Beauty and the Beast)Edit
He is an old man
He plays Tito in Larry and CompanyEdit
He plays Hiro Hamada in Big Engine 6 Edit
He is a bot fighter
He plays Bernard in The Rescuers (Hiatt Grey Style)Edit
He is a Mouse.
He plays with Mike in Characters University Edit
He is a Green Monster
He plays Mike in Party Central (TongueSpeakingFool Style) Edit
He palys Tito in Larry and Company Edit
He plays Quill in Soar (Disney and Sega Style) Edit
he is a monkey
He plays Lucky in 101 Cartoons (TongueSpeakingFool Style) Edit
He is a spotty Puppy
He plays Pig in Home (TongueSpeakingFool Style) Edit
He plays Gnomeo in Thomas & Penny Peterson Edit
He is a Gnome
He plays Jiminy Cricket in MickeynocchioEdit
He is a cricket
He plays Ariel in The Little Tank EngineEdit
He is a mermaid
He plays Rayman in Thomas (Rayman) (Julian Bernardino's Style), Thomas (Rayman) (Toonmbia's Style), Thomas (Rayman) (TheLastDisneyToon and Toonmbia's Style), Thomas (Rayman) (TheLastDisneyToon and Toonmbia's Style) (Version 2) Thomas (Rayman) (TheLastDisneyToon's Style)Edit
He is a limbless hero
He plays Benny in The Toon Movie (TongueSpeakingFool Style) Edit
He plays Pac-Man in Thomas and the Ghostly Adventures Edit
He is a hungry engine
He plays Inky in Jack and the Ghostly Adventures Edit
He is a ghost
He plays The Magic Mirror in Brian (Shrek)Edit
He Plays Simba In The Tank Engine KingEdit
He Is A Lion
He Plays Bill the Lizard in Zelda In Wonderland Edit
He is a lizard
Ten cents ( TUGS )
Pollandball ( Pollandball)
He plays Blu in Rio (Paul Young and Paul Young 65's Style) and More!Edit
He is a parrot.
He plays Stuart Little in Thomas Little (Stuart Little) (Daniel Pineda's Style), Thomas Little 2 (Stuart Little 2) (Daniel Pineda's Style) and Thomas Little 3 (Stuart Little 3) (Daniel Pineda's Style) Edit
He is a mouse.