 Kneale 's treatment for the film met with the approval of John Carpenter , the producer of the Halloween series , although Kneale was required to write the script in only six weeks . Kneale got on well with the director assigned to the film , Tommy Lee Wallace , but when one of the film 's backers , Dino De Laurentiis , insisted upon the inclusion of more graphic violence and a rewrite of the script from Wallace , Kneale became displeased with the results and had his name removed from the film . 
