Revealing mistake: When the elephant is loaded into the truck, the tracks abruptly end behind Charlie.
Audio problem: In the first shot, Duck's chuffing sound doesn't match his speed.
Revealing mistake: When Samson crosses the Vicarstown Bridge, there is no shadow effect on his face.
Revealing mistake: When Gordon falls into the ditch, wires under his cab are visible.
Revealing mistake: The old engine's model, who fell off the bridge, was actually Skarloey's, as some red paint can be seen.
Revealing mistake: In a shot of Duck at the smelter's, a hole is visible on his running board.
Gordon Takes a Tumble - S6-E17
Continuity mistake: When Gordon leaves the docks, he has his lamp, but in the next scene, it disappears.
Fergus Breaks the Rules - S7-E18
Continuity mistake: When Fergus runs away, his taillamp is on his right side. When he hides in the siding, his lamp is on the left side.
The Great Little Railway Show - S24-E3
Continuity mistake: In one scene, Rex disappears and is replaced with Mike.
Thomas' Animal Friends - S24-E20
Continuity mistake: When Thomas passes by Crovan's Gate, James' side appears to be silver.
Cleo the Road Engine - S24-E17
Continuity mistake: Thomas' brake van changes design. From a black one, then to an orange one.
Revealing mistake: When Toby tells the Fat Controller about the broken windmill, his driver's head appears to have been digitally added.
Other mistake: In the first shot of Brendam Docks, there is a siding that is inaccessible from the other tracks.
Other mistake: The Breakdown Train to the left, in the opening scene, is derailed.
Wrong Road - S2-E22
Revealing mistake: Wires to power the lamps are very visible on Gordon's and Edward's buffers, and bulbs are also sticking out from both their lamps.
Revealing mistake: In a close up of Stepney at the beginning, his lamp iron has a burn mark.
Revealing mistake: When Stepney is returning home through the fog, the source to power his lamp is visible.
Revealing mistake: The end of the set is visible in one shot at the quarry.
Fergus Breaks the Rules - S7-E18
Revealing mistake: A wire is under Fergus when he arrives at the smelter's.
Other mistake: When Oliver leaves for the Works after his accident, Toad's eyebrows are missing.
Answer: Breakdown trains help the engines back on track.