Wrong Road - S2-E22
Revealing mistake: Wires are visible on Gordon's and Edward's buffer beams, and light bulbs are also sticking out from their lamps.
Visible crew/equipment: The reflection of a crew member's face can be seen in the window of Edward's cab when his driver says, "Well done, boy. You've got them! You've got them."
Trivia: The map of the Mid Sodor Railway is actually based on a map of the Isle of Wight's railway network, flipped upside down. The line the Portly Man points out is the Isle of Wight Central Railway from the seaside town of Cowes.
Revealing mistake: During the scene of James and Duck at Knapford station, Duck's footplate is clipping through the platform.
Other mistake: Chucklesome Trucks: In the distance shot of Vicarstown, the station is missing its letters.
Visible crew/equipment: In the shot of Skarloey puffing by the crossing with the tractor, a crew member is visible on the far left side of the screen behind the bush.
Revealing mistake: When James crashes into the tar tankers in the present day, he is already covered in tar before he actually hits the tankers.
Snow Engine - S7-E14
Other mistake: When Oliver passes the level crossing before he crashes, there is no one in his cab.
Thomas' Christmas Party - S1-E26
Trivia: At the end, the podium on which The Fat Controller is standing, is made of LEGO bricks.
James and the Red Balloon - S6-E15
Continuity mistake: When Percy arrives at the docks, he is carrying some freight cars. But when Thomas leaves the cars Percy was carrying disappear.
Visible crew/equipment: In the scene where James pulls up beside Gordon, studio equipment is visible in the top portion of the screen.
Continuity mistake: When Murdoch returns to the shed in the last scene, Emily is there too, but in the last two shots, she disappears.
Continuity mistake: After Stepney's driver tells Stepney to speed up, Caroline is nowhere to be seen.
Visible crew/equipment: When the Fireflies form the engine, the end of the set is visible in the distance.
Continuity mistake: When James passes Edward at Knapford, Edward's train does not have a brake van. But two shots later, it does.
The Sad Story of Henry - S1-E3
Revealing mistake: When the passengers try to pull Henry out of the tunnel, they have putty on their feet. Sir Topham Hatt's hand is also purple.
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.
Continuity mistake: The sign says: "Danger - engines must not pass this board." When Thomas passes it, "board" is replaced with "point."
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.
Visible crew/equipment: As Henry crashes into the goods train, a crew member's hand can be seen pushing him, at the left side of the screen.
Answer: Breakdown trains help the engines back on track.