Santa's Little Engine - S17-E18
Continuity mistake: The sleigh leaves tracks in the snow behind when it slides down the hill. When Thomas races towards the sleigh, the Snow Tracks disappear.
Thomas the Tank Engine & Friends (1984)
1 continuity mistake in Santa's Little Engine
Starring: Alec Baldwin, Michael Brandon, Ben Small, Martin Sherman, Michael Angelis
Continuity mistake: Despite Henry's issue from "Coal" in Season 1 being resolved after the crash in "The Flying Kipper", also in Season 1, Henry needed special coal again from "Thomas and the Magic Railroad" until Season 16.
Thomas: Wake up lazy bones - do some hard work for a change.
More trivia for Thomas the Tank Engine & Friends
Question: Why was Henry put on a barge instead of being taken to the works?
Answer: He was in the water.