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This article is about Sir Toham Hatt's grandchild. You may be looking for the engine.

Stephen Topham Hatt is Sir Topham Hatt's grandson and Bridget Hatt's older brother. In The Railway Series, he took over his father's role as controller of the North Western Railway in 1984 and became Sir Topham Hatt III in 1997.


The Railway Series

Stephen Hatt was born in 1941 to Charles Topham and Amanda Hatt (nee Croarie), his sister Bridget was born two years later in 1943. In 1951, the Hatts spent a long holiday on Toby's old line in East Anglia. Stephen was excited when he first met Toby, but Bridget accidentally offended him by assuming he was an electric tram.

He became the Fat Controller in 1984 and succeeded to his father's baronetcy upon his death in 1997. In 1970, he married Helen Margaret, a distant cousin and granddaughter of the Reverend Nicholas Dreswick, the much-respected historian of Sodor. They had three children: Richard Topham, born in 1972 and no doubt destined to be Sir Topham Hatt IV (Stephen turned seventy-nine in 2020 and gave no hint of retiring), Charles Nicholas (1974-present) and Emily Helen (1977-present).

He played a part in the construction of Jock, which was a project dear to his father's heart. With great skill, he masterminded the arrangements for the royal visit in 1995, when he welcomed the Prince of Wales on his first visit to Sodor.

Thomas & Friends

Stephen had never grown up to be the controller and has always remained ten years old. He was amongst the boys who teased Daisy about bull's-eyes and was also amongst the boys who teased Sir Handel about George. He and Bridget helped Toby discover an old castle. He thought that Edward was the strongest and the best after Edward pushed Duck, Gordon, and their trains into Knapford Station. He and Bridget flew a kite, which got blown away, but Thomas, along with Charlie, Percy, Edward and Emily retrieved it.

He and Bridget later caught chickenpox, convincing Henry that engines could catch chickenpox as well. To cheer them up, their grandfather took them for a day out in Winston. Stephen attended Sir Robert Norramby's Christmas Lunch and the opening of the Harwick Branch Line with the rest of his family.

Once, he, along with his sister and grandfather were supposed to take a tour around Arlesburgh Harbour on Skiff; however, the rail boat thought he saw a mermaid and went to sea with just Sir Topham Hatt aboard, to Stephen and Bridget's distress. Eventually, Harold and Captain found them. Another time, he was part of a group of VIPs that Hugo took on a rail tour from Knapford to Vicarstown.


The Railway Series

He appeared in the following books as the Fat Controller:

Companion Volumes

Thomas & Friends


Music Videos

Learning Segments

Magazine Stories

Stephen Hatt also appeared in the magazine stories, A Colourful Christmas, A Friend's Party, A Hole in One, Big Catch, Daisy and the Fish, Doctors and Nurses, Fair Scare!, Gone Fishing, Happy Holiday!, Harvest Time, Keeping Dry, Lights On, Misbehaving, Puzzles, Retirement Time, Snap Happy, Steaming!, The Christmas Sacks, The Hallowe'en Special, The Tiny Engine and Working Whistles.

Annual Stories

Voice Actors


  • In the magazines, he and Bridget have a friend named Marcus.
  • In the magazine story, The Hallowe'en Special, it is said that Stephen and Bridget live on the Mainland and only come to stay with Sir Topham and Lady Hatt every so often.
  • In Saved from Scrap, Stephen's model was used as one of The Vicar's sons.
  • From the third to seventeenth series, Stephen wore a green sweatshirt instead of a jacket and tie.
  • Stephen's Series 5 seated figure is on display at Drayton Manor.


* RWS only | ** T&F only | --- Dropped