Continuity mistake: When Thomas finds Percy, he is behind him; but later when they arrive at the Steamworks, Thomas is in front. The same thing happens with Edward.
Thomas the Tank Engine & Friends (1984)
1 mistake in Surprise, Surprise - chronological order
Starring: Alec Baldwin, Michael Brandon, Ben Small, Martin Sherman, Michael Angelis
Bill and Ben: We're not playing. We're rescuing our trucks.
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.