The Railway Series books by Reverend W. Awdry, featuring the original stories of Thomas the Tank Engine and friends, began publication.
Thomas the Tank Engine was introduced as a character in the Railway Series, gaining popularity among readers.
The television adaptation of The Railway Series, titled "Thomas & Friends," premiered, bringing the characters to a wider audience.
The show transitioned from model animation to CGI animation, modernizing the appearance of characters and settings.
The franchise underwent a reboot with a new animation style and format titled "Thomas & Friends: All Engines Go," aimed at younger audiences.
Thomas arrives on the Island of Sodor and begins working as Edward's shunting engine at the North Western Railway.
Thomas is assigned to the branch line, where he carries passengers and goods, becoming a reliable and friendly engine.
Henry is introduced as a large green engine with a controversial reputation due to his issues with his design and use.
James gets stuck in the Mucky Mountains and is rescued by Thomas and other engines, deepening their friendship.
Diesel and his gang cause trouble on the railways, challenging the steam engines' dominance and creating many obstacles.
Thomas works despite a severe snowstorm to keep services running and to help his friends get through difficult times.
Thomas and his friends assist in launching a fast express service connecting important parts of Sodor, showing progress.
Diesel 10 arrives with a gripping claw to cause mischief and challenge the engines, but they band together to stop him.
Thomas and the engines participate in a large-scale rail swap, trading roles and routes to keep the railway running efficiently.
A museum dedicated to steam engines, including Thomas and friends, opens on Sodor to celebrate their history and legacy.
