Revealing mistake: In a close up of Thomas' driver, his cap brim is falling off and he has a hole in his head.
Revealing mistake: In a close-up of Thomas at the beginning of the episode, his wheels aren't moving for 2 seconds. This is easier to see in the restored version.
Revealing mistake: In a shot of Henry going around a bend in the country, you'll notice that the other side of the coaches is seen painted tan but the other side is painted green and white. This is because of budget limitations.
Revealing mistake: In the first close-up of the policeman, the camera wobbles.
Character mistake: In the shot of Gordon pulling Percy, he is congratulating Percy, but Percy didn't stop the accident, Gordon himself did. Percy didn't try to get out of the way, Gordon had to put his brakes on as hard as he can. So why is Gordon congratulating Percy?
Bradford the Brake Van - S20-E5
Other mistake: A rock is floating in mid-air when Thomas goes up Gordon's Hill.
Diesel and the Ducklings - S20-E4
Continuity mistake: When Diesel keeps James and Gordon waiting, they are at the top of the hill, but a few shots later, they are at the bottom of the hill.
Other mistake: Oliver's arm is too tall to fit under the bridge.
Revealing mistake: When Henry arrives at the forest where he finds his lucky trucks, one of the trees is not covered in snow.
Revealing mistake: The waves hitting the ship are obviously being sprayed by a hose.
Wrong Road - S2-E22
Revealing mistake: When Edward crosses the viaduct, the last coach of his train does not have lighting.
Continuity mistake: US Only: Henry reverses on to the siding, then he leaves it again. His tender also hits the station building.
Other mistake: In a close up of Bertie, he has no driver.
Continuity mistake: Because of the production order, Murdoch appears at the sheds, but his introduction is 2 episodes later, in "Peace and Quiet." Spencer also appears at the sheds, but his introduction is 8 episodes later, in "Gordon and Spencer."
Factual error: When Spencer brakes after he hears Percy whistle, his bogey wheels spark, but they do not have brakes.
Audio problem: When Sir Topham Hatt goes "Mmmmmmm..." if you listen closely, you'll hear Ringo Starr's lip smacking in the background very faintly. This goof is only visible in the American version of the episode. (00:03:00)
Thomas, Terence and the Snow - S1-E13
Revealing mistake: When Thomas gets dragged out of the snow by Terence, he is still covered in snow all around him, but two shots later, the snow has vanished.
Toby and the Stout Gentleman - S1-E21
Revealing mistake: When Toby and Sir Topham Hatt are at Lower Arlesdale, Toby's face is loose.
Toby and the Stout Gentleman - S1-E21
Other mistake: Toby passes the Post Windmill twice, but that is on Thomas' branch line.
Toby and the Stout Gentleman - S1-E21
Revealing mistake: In a close up of Sir Topham Hatt, the camera shakes.
Answer: Breakdown trains help the engines back on track.