There are several contradicting sources as to why Frank Darabont was 'fired' from The Walking Dead, but a lot of them seem to agree that it was down to budget and disagreements with the pacing of the show. Despite being AMC's most successful pilot series, the budget was slashed, AMC increased the episode count per series from 6 episode to 13 and wanted to use half as much of the source material to last twice as long in the series. This meant that the pacing of the show changed dramatically - The Walking Dead became a series that prioritised character development over development of the plot, and also a series that could not afford to hire a three-time academy award nominee as their showrunner, especially if they had creative disagreements that prevented the producers from doing what they wanted to with the show.
Regardless of how things with Frank Darabont turned out, the show has thrived and continued to be successful and renewed for many seasons under then control of Glen Mazzara for seasons two and three, then Scott Gimple from season 4 to the current season 7. Although the overall visual style of The Walking Dead has not changed that dramatically - the entire series is shot on 16mm film which gives it that grainy look which adds to the bleak view of the apocalypse - we see very different styles of pacing with both Mazzara and Gimple. Mazarra's seasons tend to focus on one location per season and explore how the characters' relationships with each other change and develop as a result of these different scenarios. Gimple's seasons seem to move around more than Mazzara's in terms of geography but the characterisation seems somewhat disjointed; for example, sometimes episodes will only follow one particular character which breaks the flow of events but also allows for some really fleshed-out characterisation. In my opinion, whilst I appreciate the need for characterisation in television, by spending entire episodes on singular characters, I find there is little payoff and it detracts from the excitement of the show. One 'characterisation episode' in season 5 even ended with the character's death, so it felt like such a waste to explore all the potential for this character and then just to end it felt really disappointing.
Even though the plot aspect of The Walking Dead can fluctuate in quality, it is without a doubt that the show thrives through its visual storytelling via special effects and locations. Greg Nicotero is co-producer and special make-up effects supervisor for The Walking Dead, and has also directed a number of episodes. He is a master of special effects makeup and it is clear that he put a lot of effort into the visuals of the 'walkers' (zombies). Each walker on the show is put through "zombie school" in which extras are taught to move like a zombie should. They are then split into three categories: hero, midground, and deep background. The 'hero walkers' are in full body makeup as they are closest to the camera, 'midground walkers' wear more subtle coloured and tonal makeup, whilst the 'deep background walkers' often wear masks as they are too far from the character for any detail to be picked up. It astounds me how many extras can be involved in a TV show such as this, and I feel it is vital for a production such as this to utilise the practical effects and makeup to create an authentic feeling atmosphere to the show, so I will aim to put a lot of effort into this area of production.http://www.cinemablend.com/television/Real-Reason-Frank-Darabont-Was-Fired-From-Walking-Dead-34197.html
http://movieweb.com/walking-dead-frank-darabont-lawsuit-deposition-amc/
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