David Greenwalt is an American television writer and producer, best known for his work on popular series such as Buffy the Vampire Slayer and its spin-off, Angel. He has contributed to the development of various shows, showcasing his talent for blending drama with supernatural elements. In addition to his work on Buffy and Angel, Greenwalt has been involved in other projects, including Grimm, a fantasy drama that aired from 2011 to 2017. His storytelling often features complex characters and intricate plots, making him a notable figure in the television industry.