Walking Dead gains a 4th season—but loses its showrunner!

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Jan 14, 2013, 2:52 PM EST

We've got huge news about AMC's The Walking Dead. The zombie juggernaut will live to see another season—but that's not all. Once again, there's a behind-the-scenes shakeup.

On the heels of the show's renewal, AMC dropped a bomb—executive producer Glen Mazzara is leaving. He's the second showrunner to step down, following Frank Darabont.

Mazzara released an official statement saying, "My time as showrunner on The Walking Dead has been an amazing experience, but after I finish season 3, it's time to move on.  I have told the stories I wanted to tell and connected with our fans on a level that I never imagined. It doesn't get much better than that. Thank you to everyone who has been a part of this journey."

According to the network, "Glen guided the series creatively for seasons 2 and 3. AMC is grateful for his hard work. We are both proud of our shared success. Both parties acknowledge that there is a difference of opinion about where the show should go moving forward, and conclude that it is best to part ways."

Sounds like creative differences broke up their union. We're sad to see him go. So far, season three has proven to be much more balanced and entertaining than its predecessor. Now who's going to keep that going?

The Walking Dead returns Feb. 10 on AMC.

(via THR)