Thomas is just in the way as his friends help prepare for a big ocean show at the docks, but when Percy is startled by one of the exhibits and creates havoc, Thomas helps get things back on track.
Stepney, a very old engine, is in charge of taking the museum cars to the Natural History Museum, but when he breaks down, Thomas doesn't want to get stuck carrying the old relics because he thinks the children will make fun of him. Original.
The big engines tease Thomas and say he can't do anything because he's little but he proves them wrong when he finds the missing golden engine and brings back the Magic Railroad to the Island of Sodor.