The Railway Series
Thomas insulted Terence for having caterpillar tracks, but regretted it after Terence pulled him from a snowdrift.
Terence was helping build a barn on the day Victoria was sent back to Thomas' Branch Line. After swerving for a boulder by the Hackenbeck tunnel his trailer fell down the cutting and balanced dangerously on a tree.
Thomas & Friends
As in the Railway Series, Terence went to rescue Thomas when he got stuck in the snow. He later helped Mrs. Kyndley, when her house was snowed up, and looked after her house when she went with the engines to a Christmas Party. In the second season, he befriended Duck while Thomas was at the works, and attended the Christmas Party at Tidmouth.
In the third series, he helped Trevor with the planting of new trees in the forest after a storm and assured Henry that the forest would look better than ever before. He also got trapped near a level crossing when Mavis got stuck and blocked the road. When Bertie got stuck in the mud at the Vicar of Wellsworth's party, Terence used strong ropes to pull him out. Later, when villagers were stranded by snow, Terence helped them by ploughing the snow away. In the fourth season, he was seen working at a farm near where Sir Handel had an accident.
In the sixth season, he helped clear away fallen rock on the line which had derailed Thomas, and almost Toby. He was later seen ploughing in a field, when Duncan lost his whistle trying to surprise him.
In the seventh season, he helped clear away a tree that had fallen on the line, and pulled Elizabeth out of the snow.
Terence the tractor is an assertive, orange tractor with caterpillar tracks that the engines find very unusual. But Terence is very capable of proving that he does not need rails and that his tracks allow him to go practically anywhere. He takes any teasing in the name of fun and is happy to get on with his job, usually partaking in agricultural work. But Terence never hesitates to assist in emergencies or sticky situations, road or rail, due to his helpful, forgiving nature. His tracks are particularly invaluable in harsh winter conditions when snow can affect transport across the Island. He may be slow, but he is versatile, adaptable, and helpful. He can usually be found transporting agricultural produce or cheerily ploughing fields beside Thomas's branch line.
Terence is based on a Caterpillar Model Seventy; the largest, and last design of petrol-powered tractors in Caterpillar's range. The Crawler Tractors share the same basis.
Terence is painted orange with grey caterpillars and a black engine and exhaust pipe.
- Terence is drawn with a cab, but without his widow's peak in Thomas's Christmas Party.
- Terence's television model is currently on display at Drayton Manor. His plough however has been broken since the display opened.
- According to The Thomas the Tank Engine Man, Terence was originally going to be called "Terry", but was later changed to the current and more formal version of the name.
- Terence has a detachable plough.
- Terence had never had any eyebrows in the television series, although he has eyebrows in some illustrations and merchandise.
- In some merchandising and books, Terence's name is sometimes misspelt as "Terrence".
- In the 1995 annual story, James Gets Cracking, Terence's driver was revealed to be named Farmer Finney. However, he has been driven by Jem Cole, Farmer McColl, and Farmer Collett once before.
- Terence's French name was Thierry in the Classic Series.
- His model was only ever shown with two face masks, both of which were smiling.
- ERTL (discontinued)
- Wooden Railway (discontinued)
- Take-Along (discontinued)
- Bandai Tecs
- Brio (discontinued)
- Wind-up Trains