Other mistake: When Gator chuffs past Percy, the seventh truck in his train is not on the rails.
Other mistake: When Bill and Ben push Thomas clear of the avalanche, neither of them are puffing steam.
Revealing mistake: In the opening shot after the title card, when the engines are gathered, Bill and Ben's wheel sets are not rendered on their chassis properly, as their cylinders appear to be protruding through their buffer beams. Also in this scene, Stanley seems animated too low, making it seem like his wheels are inside the rails.
Revealing mistake: When the camera is on Thomas' boiler, capturing Bill and Ben puffing away from the water tower, Thomas is not placed on the rails correctly.
Continuity mistake: When Timothy says to Thomas, "See you met Marion then," the last truck is a conflat, but in the next scene it becomes a plank wagon.
Factual error: When the Fat Controller arrives at Tidmouth Sheds, the image reflecting in the bumper of his car does not match up with its surroundings.
Continuity mistake: When Percy leaves Tidmouth Sheds with the mail train, his brake van is grey, but when he is out on the tracks, his brake van is orange.
Continuity mistake: During the beginning of the flashback, Gator has three trucks, but when he crosses the bridge, he gains a fourth truck.
Continuity mistake: When Thomas puffs away from Marion, his trucks are red, but in the next shot, they are green.
Continuity mistake: In the scene of Thomas arriving at the Clay Pits, Timothy can be seen in the background with a line of trucks. However, in the next scene, the trucks have disappeared. They later reappear when Thomas comes to pull them.
Other mistake: During the prologue, the bridge that James crosses over is actually a road bridge.
