Deliberate mistake: In the PBS airings in the U.S. of "Tuneful Toots" and "Duncan and the Old Mine", Rusty is referred to as a female rather than a male.
Thomas the Tank Engine & Friends (1984)
1 deliberate mistake in Season 9 generally - chronological order
Starring: Alec Baldwin, Michael Brandon, Ben Small, Martin Sherman, Michael Angelis
Continuity mistake: When Bulgy is driving on the road next to the rails, Thomas can be seen pulling a train instead of being repaired at the foundry.
Thomas: Wake up lazy bones - do some hard work for a change.
More trivia for Thomas the Tank Engine & Friends
Question: How did they get the broken down train at the scene of the crash without any calls?
Answer: Breakdown trains help the engines back on track.