This scientist's experiments in genetic mutation result in misfits of nature, such as the mysterious Mutato. When confronted by his father, Pollidori strangles him without remorse. Pollidori is taken into custody once his devious deeds are discovered.
Created by his father's genetic experiments, Mutato is mainly a victim of circumstance. But with the help of his grandfather, he drugs and impregnates many women, in the hopes of creating a mate for himself. After enjoying a performance by Cher, he is presumably transported to jail.
This supervisor in a telemarketing firm is actually a horrifying monster who preys on his own staff. Once being bitten by this bug-like creature, his victims turn into zombies. Pincus disappears along with several of his staff members.
After losing his medical license, Dr. Ridley begins experiments in age-reversal. He grafts the cells of a salamander onto his patient's arm, and the resulting mutation becomes John Barnett's new hand. Dr. Ridley's research dies with his final patient.
These bees have been genetically engineered to spread contagions such as the small pox disease. They swarm a school yard in South Carolina and kill an entomologist whom Mulder has asked to study them. It is possible that these bees have been designed to carry something far more sinister than small pox.