You're Thomas' twin brother named Timothy. You're a half robot you're fellow assistant to. The evil scientist named. Mr. Sir Scientist he used to be named Sir Topham Hatt and was the Fat Controller of the railway and a father figure to the engines. But not anymore. Donald and Douglas are forced to be Mr. Sir Scientist's assistances. Thomas your twin however was experiment on he's a hybrid between a fox and a dragon. There was only one dangerous experiment which is Devious Diesel.