THE FLY (1986)

When scientist Seth Brundle (Jeff Goldblum) completes his teleportation device, he decides to test its abilities on himself. Unbeknownst to him, a housefly slips in during
the process, leading to a merger of man and insect. Initially, Brundle appears to have undergone a successful teleportation, but the fly's cells begin to take over his body. As he becomes increasingly fly-like, Brundle's girlfriend Veronica Quaife (Geena Davis), is horrified as the person she once loved deteriorates into a monster. Director: David Cronenberg. Cast: Jeff Goldblum, Geena Davis, John Getz, Joy Boushel, Leslie Carlson, George Chuvalo, Michael Copeman, David Cronenberg, Carol Lazare and Shawn Hewitt.