Continuity mistake: The sign says: "Danger - engines must not pass this board." When Thomas passes it, "board" is replaced with "point."
Revealing mistake: In a shot of 2 vans singing "Pop Goes Old Ollie" you can see a spider crawling on the right side of the left van in the screen.
Revealing mistake: Max's wheels can be seen moving backwards when he is actually driving forwards. Also, both Max and Monty's steering and wheel speeds are out of sync with their movements. These events happen throughout the episode.
Visible crew/equipment: When Thomas puffs away from Toby, two steam platforms are visible.
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.
Santa's Little Engine - S17-E18
Revealing mistake: At one point, the shading effect on Thomas' whistle is not rendered properly, so it appears silver instead of gold.
Lady Hatt's Birthday Party - S5-E4
Continuity mistake: When George drives into the ditch, the Fat Controller prematurely tips over, then tips over again in a closeup shot.
Saved You! - S12-E10
Continuity mistake: After he is rescued by Thomas, Toby's face changes size between shots.
Thomas and the Missing Christmas Tree - S2-E26
Visible crew/equipment: In the scene of Donald and Douglas going out of the yard, a camera tripod can be seen in the top left corner.
Other mistake: In some shots of Percy in the water, his boiler is chipped.
Revealing mistake: A wire can be seen between Rusty and his coach after the workmen have removed the ice from Skarloey.
Henry Gets the Express - S20-E3
Continuity mistake: Throughout the scene when he is at Brendam Docks, Gordon's paintwork is noticeably darker.
Thomas and the Missing Christmas Tree - S2-E26
Other mistake: In the shot of Donald, (or Douglas) Gordon and Henry, Donald has Edward's face.
Thomas and the Breakdown Train - S1-E7
Revealing mistake: In the scene of James' wheels sparking while passing Tidmouth Sheds, a metal rod is igniting the sparks from his wheels.
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: In a close-up of Thomas, Annie and Clarabel are nowhere to be seen.
Revealing mistake: When Murdoch asks Gordon "What decorations will you have, Gordon?" his left eyebrow (viewer's right perspective) is scratched.
Bowled Out - S4-E18
Continuity mistake: When the diesel grinds to a halt and the camera switches to Duck and Stepney and then back to him, he is noticeably further away from the coaches.
Continuity mistake: Throughout the episode, rust stains disappear and reappear on Duncan's front buffers.
Visible crew/equipment: In the opening shot of the restored version, studio equipment is visible in the top-left corner.
Answer: Butch the breakdown truck must have pulled Gordon's tender all the way up the rails so the breakdown train can reach it and also Butch helped to get Gordon close to the winch.