Although series co-creators Larry David and Jerry Seinfeld wrote the bulk of the show's episodes during the early seasons, Charles was their second in command during this period. Charles had met "Seinfeld" co-creator David when he was part of the writing staff of the ABC sketch show "Fridays", on which David and Michael Richards were also part of the show's ensemble cast. Charles had been unable to write for the show's first season, as he had been writing for "The Arsenio Hall Show".