The Devious of Evil (Originally known as The Rough Gang) are the groups of enemies of Thomas' Adventures Team.
- Devious Diesel
- Iron' Arry and Bert
- Sailor John
- Queen Chrysalis
- The College of Crooks (The Owl, The Rattler, Hurricane Harry, Jack-in-a-Box, Dr. Madcap and his wife Greta Ghoul)
- Prince Froglip, The Goblin Queen and The Goblin King
- Katz, Le Quack, Cajun Fox, Clutching Foot, Weremole and Queen of the Black Puddle
- Diesel 10 was going to be the leader of the Rough Gang, but 76859Thomas decides to take off since he'll be reformed in Pooh's Adventures of Thomas & Friends: Day of the Diesels.
- The Rough Gang will make their appearance in Thomas the Tank Engine in Fantasmic (Disneyland Version).
- Prince Froglip, The Goblin King, The Goblin Queen will join the team after Thomas' Adventures of The Princess and the Goblin.
- Sailor John will join the team after Pooh's Adventures of Thomas & Friends: Sodor's Legend of The Lost Treasure.
- Katz, Le Quack, Cajun Fox, Clutching Foot, Weremole and Queen of the Black Puddle will join the team in Thomas' Adventures of Osmosis Jones.
- From Thomas the Tank Engine in Fantasmic (Disneyland Version) to Thomas the Tank Engine Goes On A Quest For Camelot, They shell be known as The Rough Gang, but their team name will change from Thomas' Adventures of Freddie as F.R.O.7. onward.
- The Devious of Evil shares a very similar name to David Graham's Masters of Evil.