Continuity mistake: Throughout the episode, rust stains disappear and reappear on Duncan's front buffers.
Thomas the Tank Engine & Friends (1984)
1 mistake in Duncan the Humbug
Starring: Alec Baldwin, Michael Brandon, Ben Small, Martin Sherman, Michael Angelis
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.