<P> The "monkey - cat" of Pogue's script was repurposed by Cronenberg into a twisted, desperate attempt by Brundle to find a cure, and Pogue's sequence of a fly leg hatching from Geoff's side was taken one step further, with Brundle amputating the twitching limb with his teeth . Pogue's script also featured a bag lady being murdered by Geoff in an alley, and Cronenberg revised this so that the woman was killed by vomit - drop (as with DeWitt's murder at the end of the original draft) rather than Geoff cutting her throat accidentally (however, Cronenberg never filmed his version of this sequence, which was written out of the final shooting script). While Cronenberg's script did not end with Veronica Quaife giving birth, it did end with a coda which revealed that she was pregnant with a normal baby, conceived by Borans after Brundle's death (and the abortion of Brundle's possibly tainted fetus). </P> <P> Despite the extensive rewrite of Pogue's script, Cronenberg insisted during Writers Guild arbitrations that he and Pogue share screenplay credit, since he felt that his version could not have come to pass without Pogue's script to serve as a foundation . </P> <P> With a script that everyone approved of, Cronenberg assembled his usual crew and began the process of casting the picture, ultimately deciding on Jeff Goldblum and Geena Davis for the leads . Chris Walas, who had designed the creatures in Gremlins, was hired to handle the film's extensive special effects . Filming took place in Toronto in 1985--1986 . </P> <P> The producers also commissioned musician Bryan Ferry to record a song for the film for promotional purposes . The resulting track was entitled "Help Me". A music video was made for the song, and footage from the film was prominently featured in it . Cronenberg admitted to liking the song, but felt that it was inappropriate to the film itself . Brooks and Cornfeld originally wanted to play the song over the closing credits, but after Cronenberg screened it for them, they agreed with the director that it did not mesh with the movie . As a result, the song is featured only briefly in the film, in the background during the scene where Brundle challenges Marky in the bar . "Help Me" became rather obscure as it was not included on the film's soundtrack release . The song resurfaced in 1993 on the Roxy Music / Bryan Ferry compact disc Ultimate Collection . </P>

Who did the special effects for the fly