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.
Thomas Comes to Breakfast - S2-E18
Other mistake: The narrator said Thomas was feeling conceited, but Thomas had his sad face mask on instead.
Continuity mistake: Bulgy was converted into a vegetable stand in "Bulgy Rides Again." But from "Excellent Emily" onward, he is a passenger bus again.
Thomas and the Rainbow - S9-E2
Audio problem: At the beginning, Henry has Gordon's whistle sound.
Revealing mistake: When Duck goes off to fetch Gordon's coaches following his chat with Diesel, the device beneath the tracks used to produce steam continues to smoke long after Duck has left.
Edward, Gordon and Henry - S1-E4
Other mistake: When Gordon is sent to the siding after breaking down, he passes the set of points needed to cross over to the other line.
Character mistake: The narrator says that Rusty chuffed bravely across the bridge, but Rusty is a Diesel and thus cannot chuff.
Other mistake: When the narrator says that Duncan ran out of coal in the bridge, there is coal in his bunker.
Revealing mistake: In a close up of Percy's driver, he is in Henry's cab.
Revealing mistake: When Percy is at the "backing" signal, his cylinder is sagging.
Audio problem: Edward has Thomas' whistle sound when he first sees Trevor and when he approaches Wellsworth Station.
Continuity mistake: When Emily and Whiff pull the rubbish trucks away, Whiff is coupled up to Emily, and Emily is coupled up to the trucks. When they pull them away, their buffers are separate.
Revealing mistake: When Edward is at the last station, his whistle is crooked.
Continuity mistake: At the beginning, Edward is pulling 5 cattle trucks. When he approaches the cows, he is pulling 4 cattle trucks.
Continuity mistake: Gordon's express train has 1 composite coach and 2 brake coaches when he passes through Wellsworth station. When he crosses the viaduct, he has 2 composite coaches and 1 brake coach.
Revealing mistake: After Gordon stops on the bridge for the cow, his wheels keep moving for 3 seconds.
Revealing mistake: When Percy stops on the bridge, white glue is on his middle lamp iron.
Continuity mistake: Gordon can be seen next to Edward when Edward says "two big engines afraid of a cow?", but Gordon should have been on the turntable.
Answer: Breakdown trains help the engines back on track.