Continuity mistake: When Salty gets blocked by the trucks, his face increases in size.
Saved You! - S12-E10
Continuity mistake: After he is rescued by Thomas, Toby's face changes size between shots.
Thomas Puts the Brakes On - S12-E17
Continuity mistake: Thomas has a brake van when he arrives at the bridge. When Stanley, Thomas, Murdoch, and Rocky start looking for the bricks, the brake van disappears.
Continuity mistake: Thomas says that Mavis and Cranky never make mistakes, but they have in "Mavis" and "No Sleep for Cranky."
Continuity mistake: After Thomas goes to the docks, the giraffe's flatbed somehow changes tracks at the Animal Park.
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.
Continuity mistake: When Thomas passes Gordon, Butch's magnet is attached to Thomas. In the next shot of Thomas, it isn't. And in the shot after that, the magnet is attached again.
Continuity mistake: Gordon's Hill is much taller and steeper than it usually is. Also, when Belle reaches the other side of the hill, the tracks on the viewer's left disappear.
Continuity mistake: When Thomas goes back to Maithwaite, Flynn's railway wheels are not touching the rails, but his tires are.
Continuity mistake: After Thomas stops near the bridge, he does not have a Wonky Whistle.
Continuity mistake: When Flynn sprays Edward, the water goes over Edward, but somehow his driver gets wet. And when Flynn sprays Gordon, the water is seen hitting the platform and Gordon's tender. Later, the water is seen hitting one of the coaches.
Continuity mistake: The narrator says that Dart had never seen the logging locos before, but he saw them 3 episodes ago.
Continuity mistake: When Thomas hides behind the trucks, there are only 3. But in the next shot, there is a flatbed with a crate on it in front of the trucks.
Kevin's Cranky Friend - S17-E1
Continuity mistake: Throughout most of the episode, Cranky's ladder is on the wrong side.
Kevin's Cranky Friend - S17-E1
Continuity mistake: After Sir Topham Hatt leaves the docks, Henry disappears.
Continuity mistake: At the beginning of the episode, Henry is pulling trucks and Hiro is pulling nothing. In the next shot, Henry is pulling nothing and Hiro is pulling flatbeds.
Continuity mistake: UK Only: When Luke is coupled up to Skarloey's train, he has 5 trucks and a white brake van. When the deer jumps in his cab, the brake van disappears. And when Luke is heading towards the Castle, he has a brown brake van.
Santa's Little Engine - S17-E18
Continuity mistake: The sleigh leaves tracks in the snow behind when it slides down the hill. When Thomas races towards the sleigh, the Snow Tracks disappear.
The Afternoon Tea Express - S17-E26
Continuity mistake: In the shot of Stephen at the dairy, one of the trucks is in the front and the other one is at the back. But in the shot when Stephen is out and about, the first one is at the far back and the other truck is at the front, but later, the trucks go back to their original positions.
Continuity mistake: Throughout the episode, rust stains disappear and reappear on Duncan's front buffers.
Answer: Breakdown trains help the engines back on track.