In the Railway Series, they first appeared in the Henry the Green Engine. When Gordon jammed his whistle, the fire brigade thought it was an emergency alarm. So they stood on duty with five fire trucks.
In the television series, they first appeared in the fifth season. Throughout the sixth season and seventh season, they were commonly seen at Dryaw. Before the show was converted to CGI, the fire engines made several cameos until The Great Discovery. From the ninth to twelfth seasons a fire truck was seen at the Sodor Airport.
Since Belle and Flynn's arrival, the fire engines have been rarely seen. However, one of the signs on the Sodor Search and Rescue Centre Building depicts an Ambulance and a Fire Engine. The vehicles on the sign are based on those used in the Model Series.
The fire engines resemble the Dennis F8 fire engines.