When Seth Brundle makes a huge scientific and technological breakthrough in teleportation, he decides to test it on himself. Unbeknownst to him, a common housefly manages to get inside the device and the two become one.
Ed Okin used to have a boring life. He used to have trouble getting to sleep. Then one night, he met Diana. Now, Ed's having trouble staying alive.
Johnny Smith is a schoolteacher with his whole life ahead of him but, after leaving his fiancee's home one night, is involved in a car crash which leaves him in a coma for 5 years. When he wakes, he discovers he has an ability to see into the past, present and future life of anyone with whom he comes into physical contact.
Elliot, a successful gynecologist, works at the same practice as his identical twin, Beverly. Elliot is attracted to many of his patients and has affairs with them. When he inevitably loses interest, he will give the woman over to Beverly, the meeker of the two, without the woman knowing the difference. Beverly falls hard for one of the patients, Claire, but when she inadvertently deceives him, he slips into a state of madness.