Seth Brundle

Seth Brundle mastered molecular physics at the age of 20, and devoted his life to developing a teleportation system, due to his severe motion sickness, to allow himself to travel places without getting sick. Brundle dedicated his life to his invention, and adopted personality traits similar to Albert Einstein, such as owning 5 pairs of the exact same set of clothing to save mental energy deciding what to wear. Brundle attended a convention hosted by Anton Bartok (who would eventually become the main antagonist in the sequel), where he met Particle Magazine journalist, Veronica Quaife. Brundle convinced Veronica to allow him to demonstrate his newly created "telepods" to her, gaining her intrigue when he stated that it would "change the world". Brundle was able to convince Veronica not to send her story on him to her boss, Stathis Borans, as he wasn't ready for the world to hear about it yet, in exchange for allowing Veronica to help on his projects. After the two share an intimate encounter, Brundle has an epiphany that the telepods were reinterpreting flesh instead of reproducing it, leading to Brundle reprogramming the system to allow the successful teleportation of a baboon. Veronica abruptly left to confront Stathis after learning he was planning to unveil Brundle's telepods prematurely, which Brundle interpreted as Veronica still being in love with Stathis. The drunken and depressed Brundle performs the telepod's human testing on himself to deprive Veronica witnessing his miracle of science. Unbeknownst to him, a common housefly had entered the telepod at the same time as him, leading to the computer merging the two together. Brundle sees the test as a success and reconciles with Veronica. When Brundle awakens in the morning, he finds that his reflexes and senses have enhanced. Brundle theorises that the telepods had somehow purified and improved his physicality. However, Veronica discovers coarse and unusual hairs growing out of Brundle's back, leading to a heated exchange where Brundle claims Veronica is simply jealous of him. Brundle attempted to force Veronica to use the telepods, but she refused and Brundle stormed off, abandoning her. Brundle entered a bar and entered an arm-wrestling competition with a man in exchange for his girlfriend, Tawny. Brundle uses his newfound superhuman strength to snap the man's arm and spends the rest of the night engaging in sexual escapades with Tawny. Brundle attempted to force Tawny to use the telepods, only for Veronica to intervene and Tawny and Veronica being kicked out of the laboratory. Brundle then enters his bathroom and notices his fingernails are beginning to fall off.

The degeneration stages of Seth Brundle into Brundlefly designed by Chris Walas

After this discovery, Brundle rushes to the computer and discovers that the telepods had merged him and the housefly together. Brundle eventually calls Veronica to reconcile, and confides with her that his body has begun to degenerate into a deformed hybrid creature he had begun calling "Brundlefly". Brundle also begins showing other fly-like characteristics such as consistently vomiting a corrosive enzyme on his food to be able to digest it and an addiction to sugary foods. Brundle becomes increasingly overwhelmed by the shock and horror of his mutation and begins finding the humour of his degeneration, including his ability to stick to walls, while still searching for a cure for his condition all the same. Brundle then comes to the conclusion that the only way to become human again is to use the telepods to merge with another human. Brundle overhears a conversation between Veronica and Stathis that Veronica is pregnant with Brundle's child, and plans to abort it. This led to Brundle storming into the clinic Veronica is at and abducting her before she can carry through with her abortion. Brundle begged Veronica to keep the child as it was "all that's left of him", Veronica confessed her fears that the child might be a hybrid as well. Brundle takes Veronica back to his warehouse and witnesses Stathis enter the facility with a shotgun. Brundle attacked Stathis and dissolved his left hand and right leg with his corrosive enzymes before Veronica pleaded with him not to kill Stathis.

Brundle reveals his plan to Veronica to use the original two telepods to merge the two of them and their unborn child together in a third telepod that will act as a receiving pod. Veronica resisted him, and accidentally removed Brundle's jaw in the scuffle, prompting Brundle's final mutation, causing Brundle's rotting flesh to shed and reveal the gruesome man-housefly hybrid monster that had been growing inside of him. Brundlefly trapped Veronica inside telepod 1 and stepped inside telepod 2 to initiate the merge. Stathis, still conscious, severs the cables to telepod 1 with a shotgun to allow Veronica to escape safely. Brundlefly attempted to break out of the second telepod, but was too late, and becomes a monstrous combination of the hybrid and the metal of the telepods. As the Brundlefly-telepod hybrid exited the receiving pod, Brundle moved the shotgun Veronica was holding to his head, pleading for her to put him out of his misery. Veronica hesitated at first, but mercifully pulled the trigger, killing Brundle and leaving Veronica devastated.[3]

Months after Brundle's death, Veronica dies while giving birth to their child, Martin. Martin continued his father's work and was often shown videotapes of Seth's work. Martin would eventually transform into a new version of Brundlefly, but was successfully able to cure his condition.[4][5]