The Fly is a 1958 American science fiction-horror film produced and directed by Kurt Neumann. The screenplay was written by James Clavell (his first), from the short story of the same name by George Langelaan.

It tells a story of a Scientist who switches his DNA with a fly while testing out his latest invention. It was followed by two sequels, Return of the Fly and Curse of the Fly. It was remade in 1986 as a film of the same name by director David Cronenberg.

The Plot:

Scientist Andre Delambre becomes obsessed with his latest creation, a matter transporter. He has varying degrees of success with it. He eventually decides to use a human subject, himself, with tragic consequences.

During the transference, his atoms become merged with a fly, which was accidentally let into the machine. He winds up with the fly’s head and one of it’s arms and the fly winds up with Andre’s head and arm. Eventually, Andre’s wife, Helene discovers his secret and must make a decision whether to let him continue to live like that or to do the unthinkable and euthanize him to end his suffering.