David Greenwalt (born October 16, 1949) is an American screenwriter, director and producer. He was the co-executive producer of Buffy the Vampire Slayer and co ... https://en.wikipedia.org/wiki/David_Greenwalt
The first season of the television series Angel, the spin-off of Buffy the Vampire Slayer, premiered on October 5, 1999 on The WB and concluded its 22-episode season ... https://en.wikipedia.org/wiki/Angel_(season_1)