The Fly

Seth Brundle, a thirty-something scientific genius, has invented a method of transporting matter between two teleports. In one teleport the matter disappears, only to reappear in the other teleport. At a party, Seth meets the attractive Veronica, who's a journalist. Seth invites her to be the first witness of his new invention. Much to Veronica's amazement, the system works, so she agrees to help on the project.

The two soon become romantically attached. A few days later, Seth, in a fit of mis-placed jealously, decides to teleport himself. As he squats in the transmission teleport, a common housefly lands next to him. During teleportation the fly's DNA is merged into Seth's. Afterwards, all seems well. But soon Seth notices that little-by-little he is morphing into a fly.