As of my knowledge cutoff date in 2023, Andrew Dabb is an American television writer and producer, best known for his work on the long-running CW series "Supernatural." He started on the show as a writer in season 4 and served as a co-executive producer before eventually becoming the showrunner in its later seasons. In addition to "Supernatural," Dabb has contributed to other television series and has also worked in the comic book industry, writing for various titles. He is recognized for his ability to handle genre storytelling, character development, and for contributing to the expansive mythology of the shows he works on.