Left "Angel" (1999/I) after its third season to join Joss Whedon's new
show "Firefly" (2002/I). Because "Angel" showrunner David Greenwalt
left at the same point to write/produce "Miracles" (2003) he still
remained involved in the story breaking process of the first seven
season 4 "Angel" episodes. When "Firefly" was canceled after 15
episodes he returned to "Angel" and wrote/directed the season finale
"Home". But he didn't return for season 5, because he felt that after
his exit the "power vacuum" on "Angel" was filled and "business was
taken care of, and quite well." He then came in contact with the pilot
for the new show "Wonderfalls" (2004) and because that show needed an
experienced showrunner he became involved.