Brian K. Vaughan is an American comic book and television writer, best known for the comic book series Y: The Last Man, Ex Machina, Runaways, Pride of Baghdad, Saga, and Paper Girls. Vaughan was a writer, story editor and producer of the television series Lost during seasons three through five. He was nominated for a Writers Guild of America Award for Best Dramatic Series at the February 2009 ceremony for his work on the fourth season.