Marc Guggenheim leaving 'FlashForward'

Co-creator David Goyer stepping in as sole showrunner

There's been a change at the helm of another freshman drama recently picked up for a full season, ABC's "FlashForward."

Co-showrunner/executive producer Marc Guggenheim is leaving the series, with co-creator/exec producer David Goyer stepping in as sole showrunner.

The move follows a similar switch last week on CBS' freshman drama "The Good Wife." Showrunner/exec producer Dee Johnson, also brought in after the pilot, has departed, handing the reins to co-creators/exec producers Michelle and Robert King.

Because of Goyer's limited hands-on TV series experience, "Eli Stone" co-creator Guggenheim was brought in after the "FlashForward" pilot to help with the launch of the mystery drama based on Robert Sawyer's novel.

After learning the ropes in a co-showrunner capacity on the original 12-episode order of "FlashForward" alongside Guggenheim, Goyer will fly solo for the series' back-nine order.

Guggenheim will focus on development under his overall deal with "FlashForward" producer ABC Studios.