David Goyer, the writer-producer who helped create the SF drama based on Robert Sawyer’s novel, is out as show runner for ABC’s FlashForward. Goyer was preceded by Mark Guggenheim, who was brought in to help the less-experienced Goyer, but stepped away last fall to work on other projects.

No replacement for Goyer has yet been named; the show is currently shooting episodes 17 and 18 of a 23-episode order this season, but all these behind-the-scenes shake-ups can’t be good for a show in its first season. It also probably isn’t much of a testosterone booster for Goyer.