Horrid Lorry - S5-E2
Continuity mistake: When Lorry 1 returns after falling into the sea, he is covered in algae and seaweed even though he wasn't submerged. He gains some more of it when Thomas sees him.
Lady Hatt's Birthday Party - S5-E4
Continuity mistake: When George crashes, the Fat Controller falls into the ditch head first, but in the following shot he is sinking feet first.
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.
James and the Trouble with Trees - S5-E5
Revealing mistake: In the end of the episode, you can see James doesn't have his face fitted on correctly, as the gap between it and his eyes appears to be exposed.
Bye George - S5-E7
Audio problem: Gordon has Duck's whistle sound before he crashes into the truck.
Factual error: The dam was built concaved from the water it holds back, but it would have been built convex in order to do so.
Visible crew/equipment: When Henry puffs under the bridge, studio equipment can be seen in the top left corner.
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.
Visible crew/equipment: When Stepney puffs through the fog after dropping off the stone loads, studio equipment can be seen in the top left corner of the screen.
Continuity mistake: When Toby comes up to the junction, the lever to the points isn't actually there. It is only seen in this episode in the shot showing where his fireman switches them.
Thomas, Percy and Old Slow Coach - S5-E16
Other mistake: When James cries for help, his eyes are wonky.
Continuity mistake: After Toad avoids James, a works coach moves from in front of the points to behind the points.
Revealing mistake: The rails to the buffers are broken as Toad leaves the siding.
Revealing mistake: When Toad switches lines to avoid Gordon, the track ends in bushes.
Visible crew/equipment: When Toad falls into the pond, in the shot from his point of view, studio equipment can be seen in the top left corner.
Visible crew/equipment: When the Fireflies form the engine, the end of the set is visible in the distance.
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: A wire can be seen between Rusty and his coach after the workmen have removed the ice from Skarloey.
Answer: He was in the water.