Other mistake: In some shots of Percy in the water, his boiler is chipped.
Other mistake: When Percy meets Thomas at Elsbridge Station, he has a water line across his boiler, even though the water only came up to his footplate.
Other mistake: After Toby breaks down, James pushes him directly to Knapford Station, not to the Works as it is said.
Other mistake: When Bill and Ben are pushing each other, Bill has no eyes, Bill and Ben's faces are slanted at the bottom, and Ben's cylinder pipe is crooked along with a tack above Bill's face seen.
Other mistake: When Oliver leaves for the Works after his accident, Toad's eyebrows are missing.
Peter Sam and the Refreshment Lady - S4-E7
Other mistake: In two shots shown at the beginning, Henry is wearing Gordon's upset face mask.
Thomas, Percy and Old Slow Coach - S5-E16
Other mistake: When James cries for help, his eyes are wonky.
Thomas, Percy and the Squeak - S6-E21
Other mistake: When Thomas sees Percy at the washdown, Gordon's front and rear bogie wheels are derailed.
Thomas, Percy and the Squeak - S6-E21
Other mistake: When Alicia the mouse is inside Clarabel, she is missing her forepaws.
Other mistake: The episode's title in the original PBS Broadcast version is "The Old Iron Bridge" but the bridge was made of wood.
Snow Engine - S7-E14
Other mistake: Before Oliver crashes, no-one appears to be inside his cab in a shot of him passing a crossing.
Other mistake: When the narrator says that Duncan ran out of coal in the bridge, there is coal in his bunker.
Thomas and the Billboard - S12-E1
Other mistake: In the opening scene when Edward and Henry can be seen going into Knapford, Henry is wearing Gordon's face mask.
Other mistake: Henry was supposed to take Emily's trucks to the Coaling Plant, but he takes them to Knapford Yards instead. The narrator also refers to Knapford Yards as the Coaling Plant.
Other mistake: The narrator says that Thomas' driver puts syrup in the lion, but actually, Thomas fireman puts the syrup on the lion. This is identified by his moustache.
Other mistake: Mavis and Cranky should've realised that Thomas woke them up the first time he blew his whistle.
Other mistake: In the first shot of Brendam Docks, there is a siding that is inaccessible from the other tracks.
Other mistake: The Rev. W. Awdry is not credited in the title card of the episodes "Mike's Whistle", "Tit for Tat", and "Useful Railway." Only Andrew Brenner's name appears.
Bradford the Brake Van - S20-E5
Other mistake: A rock is floating in mid-air when Thomas goes up Gordon's Hill.
Other mistake: Duck stops at Arlesburgh West Station for 5 seconds, which is not enough time to let passengers board his train.
Answer: Breakdown trains help the engines back on track.