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After reading 1594 websites, we found 6 different results for "Who wrote Saw IV"
Patrick and Marcus
Patrick and Marcus are the writers of SAW IV, SAW V, SAW VI and the 7th and final SAW movie, SAW
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the same team of writers (Marcus Dunstan and Patrick Melton)
and I’ve been eagerly awaiting Saw VI for several years, as it was announced that the same team of writers (Marcus Dunstan and Patrick Melton) would write Saw IV, V and VI and that Saw VI would effectively be the conclusion to the series (all be the series that Twisted Pictures have since said that they’ll make as many Saw films as the fans demand), but, in this case, the series seems like Saw VI was indeed written to be a bit of a wrap-up.
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Patrick Melton and Marcus Dunstan
Patrick Melton and Marcus Dunstan wrote the films Saw IV, Saw V, Saw VI and SAW 3D, as well as The Collector, The Collection and Piranha 3DD.
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Melton and Dunstan
Melton and Dunstan have a long horror resume, writing Saw IV, Saw V, Saw VI, and Saw VII, in addition to the Feast franchise, 2009's The Collector, and Dunstan's 2012 follow-up The Collection.
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Dunstan and Melton, who came into the national spotlight for their winning screenplay Feast on Project Greenlight’s third season
Dunstan and Melton, who came into the national spotlight for their winning screenplay Feast on Project Greenlight’s third season, have been shepherding the Saw franchise for the past three installments, having written Saw IV, V and the upcoming Saw VI.
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by Leigh Whannell
The original Saw was written by Leigh Whannell who also plays Adam and was directed by James Wan.
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