Audio problem: When Sir Topham Hatt, the policeman, and Thomas' crew are at Elsbridge Station, Thomas whistles, but his crew is standing on the platform.
Revealing mistake: In a close up of Thomas' driver, his cap brim is falling off and he has a hole in his head.
Revealing mistake: In a close-up of Thomas at the beginning of the episode, his wheels aren't moving for 2 seconds. This is easier to see in the restored version.
Revealing mistake: In the first close-up of the policeman, the camera wobbles.
Visible crew/equipment: In a close-up of Toby, you can see a hand reflected in his left window (viewer's right).
Answer: Breakdown trains help the engines back on track.