Glen Mazzara is the second showrunner to leave The Walking Dead in just three series. He took over from the suddenly-departing Frank Darabont in the early part of series two and will see the series through to the end of post production on series three.
AMC have released his official statement as to why, as well as comments from the original comics' co-creator Robert Kirkman and the show's producer Gale Anne Hurd.
From AMC and Mazara in a joint statement:
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,
Here's Mazara on his tod:
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
I am appreciative and grateful to Glen for his hard work on 'The Walking Dead.' I am supportive of AMC and Glen's decision and know that the series is in great hands with one of the most talented and dedicated casts and crews in the business. I look forward to the show's continued success
I am in full support of both AMC and Glen Mazzara in the decision they have come to and believe the parties came to this decision in the best interest of the future of the show. I thank Glen for his hard work and appreciate his many contributions to The Walking Dead and look forward to working with him as we complete post production on Season 3. I am also excited to begin work on another spectacular season of this show that I know means so much to so many people. This show has always been the result of a wide range of extremely talented men and women working tirelessly to produce their best work collectively. I believe the future is bright for The Walking Dead. Thank you to the fans for your continued support.
To take the burn off a little, AMC have also officially announced that the show will return for a fourth series. Great news, pending word on who will actually be making the thing.