A firefighter visits D.W.'s school in Arthur's Fire Drill to tell her class how to fight fires. Because of his mask, D.W. initially mistook him for a monster. After seeing that she was scared, he told her that he was just a friendly firefighter and took off his mask. He explained that it helps him to breathe in heavy smoke. D.W. told him that she could help with his presentation to her class, as she was a fire boss.