Based on the story of the same name from Small Railway Engines.
Some visitors come to the island to take photos of engines. They visit the Arlesdale Railway and take pictures of the small engines, but Bert is cross that they will not take pictures of him. As they are driving, they spray Bert with mud and Bert wants to take revenge on them. He devises a plan by giving one of them a soaking ride.
Writer: Andrew Brenner