Audio problem: When Arthur arrives at the lake, he has Spencer's whistle.
Audio problem: Douglas has Donald's whistle sound when he passes Murdoch.
Audio problem: When Oliver arrives at the station, he has Percy's whistle sound.
Starring: Alec Baldwin, Michael Brandon, Ben Small, Martin Sherman, Michael Angelis
Audio problem: When Arthur arrives at the lake, he has Spencer's whistle.
Audio problem: Douglas has Donald's whistle sound when he passes Murdoch.
Audio problem: When Oliver arrives at the station, he has Percy's whistle sound.
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.

Thomas' Christmas Party - S1-E26
Trivia: At the end, the podium on which The Fat Controller is standing, is made of LEGO bricks.
Question: Why was Henry put on a barge instead of being taken to the works?
Answer: He was in the water.