According to sources, series producer-writer Scott Gimple is in talks to replace Glen Mazzara, who left suddenly late last year -- a move that left many shocked considering it was the second time AMC has feuded with a "Walking Dead" showrunner.
Frank Darabont stepped down as showrunner in summer 2011.
Gimple will likely step into the role for the fourth season of the skein. AMC declined to comment.
Mazzara served as showrunner for the series' second and third seasons. He came aboard after Darabont stepped down because he felt the network wasn't put enough resources into the show.
Mazzara's departure led to many in the TV biz to question AMC's moves in tinkering with its most valuable property in terms of ratings.
"AMC is run by small-minded, bottom-line thinkers," "Sons of Anarchy" creator Kurt Sutter said in a rant on Twitter.
Mazzara and AMC stated that the parting of ways was largely amicable, and derived from creative differences.
In addition to his work on "Walking Dead," Gimple penned the script for "Ghost Rider: Spirit of Vengeance" and served as scribe on TV skeins including "Life," "FlashForward" and "Fillmore!"
The second half season of season three of "The Walking Dead" will return to AMC on Feb. 10.