Sir Topham Hatt is the charge of the engines from the North Western Railway. He is also called "The Fat Controller"
- Season 1 - Smokescreen, Mavis and the Lorry, Toby's Seaside Holiday (does not speak), Gordon Proves his Point, Fire Escape and High-Speed Gordon,
- Season 2 - Sir Handel Comes Home (cameo), The Missing Coach, Scrambled Eggs, Toby's Megatrain (cameo), Stop Thief!, Triple Header, Henry's Sneeze and Gordon Goes Foreign
- Season 3 - Breakvan, Domeless Engines (does not speak), Hullo Twins, Gordon's Whistle, Thomas and the Evil Diesel, Percy and the Trousers, and The Runaway
- Season 4 - The Deputation