- "Full Steam Ahead!"
- ―Thomas' catchphrase
Thomas The Tank Engine is a cheeky steam engine.
Life in Thomas & Friends
Life in The Thomas Simpson Show
Thomas was one the many characters that was ordered by Francine to do spring cleaning, Thomas complained about it to Sunshine, but he finds a way to have fun while helping Thomas go through his stuff.
Thomas is a rather cheeky, but good hearted engine and generally behaves well, except when he is getting into mishap. He loves teasing the others, especially the bigger engines, such as Gordon and on occasion, brags about his superiority, but is always brought down to earth in due course. If Thomas has one major character flaw, it is that he is forgetful and slightly impatient. However, he is also optimistic and idealistic.
Although their friendship has been turbulent at times, Percy is generally portrayed as Thomas' best friend.
- Thomas Muller
- John Hasler (Stock audio)
- The Treasure Of Goodland
- James Coming Through! (Cameo)
- Anything Goes
- A Koala Can Save Someone's Life
- Thomas' Old Girlfriend
- The Tram Engine Who Could
- A White Labrador Can Love A French Poodle
- The Power Of The Care Bears (Cameo)
- Fun And Cheekiness Together
- Narrow Gauge Vs Minimum Gauge
- You Can't Super Protect Everything
- Just One Wish And Your Dreams Come True
- The Australian Hybrid VS The British Hybrid
- Dragons Can Be On The Good Guys Sides
- Thomas was originally going to have a voice matching Joseph May, but Thomas Muller later changed him to sound like John Hasler instead. In a deleted promo, Thomas has a voice that matches his original American voice actor, Martin Sherman.
- Even though Thomas and the Magic Railroad is non-canon, Thomas has his whistle from the movie.
- Though Thomas daydreams being streamlined in The Great Race, he later actually becomes streamlined in Streamlining.