John Cho and Joseph Fiennes

Executive producer Marc Guggenheim is leaving ABC's FlashForward, according to The Hollywood Reporter.

Check out photos from FlashForward

Guggenheim, who created Eli Stone for the network, was brought in as showrunner/co-executive producer after the pilot, according to the Reporter. With a full-season pickup for the show secured, Guggenheim will depart FlashForward to develop other projects.

Co-creator and executive producer David S. Goyer (who wrote Batman Begins and the Blade series) will replace him for the show's back-nine episode order.

The Good Wife switches showrunners

The switch mirrors The Good Wife's showrunner swap last week, in which TV vet Dee Johnson handed over the reins to co-executive producers Michelle and Robert King. Like Guggenheim, Johnson was recruited for The Good Wife's initial 13-episode order while the Kings found their footing.

FlashForward opened strong with 12 million viewers tuning into the pilot; the series has since settled into the 9 million-viewers range.