Superhero! is a rhyming magazine story.
Edward is telling the story of the time a storm broke out on Sodor and he had to be brave and test a bridge that Gordon and The Diesel were too heavy to go on. Afterwards, The Diesel and Gordon admit that Edward is just as important as they are.
- Throughout the story, The Diesel's number is missing on his sides.
- In the last illustration, The Diesel is illustrated with a Co-Co wheel arrangement.
- The Diesel's buffers are black when they should be white.