トップハム・ハット卿
The Fat Controller orders an engine from Scotland to help out with goods work, but is surprised when two engines arrive instead. To confuse matters further, the engines claim not to know their British Railways numbers, or which of them should have been sent. The engines are Donald and Douglas, and are twins. As whichever one of them is sent back will be scrapped, they are determined to stay. Despite some misadventures, the other engines convince the Fat Controller to keep both of them.