He’s a Hollywood writer, director, and producer who is most notably known for his work on major television network series, such as Buffy the Vampire Slayer, Angel, and Grimm.
He is also a convert to Catholicism and is featured in the new Evangelization & Culture Journal.
Here he is on the writing process, good story-telling, and his conversion to Catholicism:
https://wordonfire.institute/journal-david-greenwalt