Angel season 4

At the start of the season, David Simkins was made showrunner and executive producer, but after three months, he left the show due to "creative differences" and is not credited in any episodes.

Steven S. DeKnight, who had written for Buffy during seasons five and six, moved over to Angel where he stayed for the remainder of the show's run.

Buffy writer-producer David Fury joined as a consulting producer (taking over Marti Noxon's role) and ended up writing four episodes.

Elizabeth Craft and Sarah Fain joined the show as staff writers and wrote or co-wrote five episodes.

Special features on the DVD include seven commentary tracks—"The House Always Wins" by writer David Fury and actor Andy Hallett; "Spin the Bottle" by writer/director Joss Whedon and actor Alexis Denisof; "Apocalypse, Nowish" by writer Steven S. DeKnight and director Vern Gillum; "Orpheus" by co-executive producer Jeffrey Bell and director Terrence O'Hara; "Inside Out" by writer/director Steven S. DeKnight; "The Magic Bullet" by writer/director Jeffrey Bell; and "Home" by writer/director Tim Minear.