The Twilight Zone - Season 1 Episode 50 Button, Button
Overview: A mysterious man offers a couple a bizarre deal: if they will push a button on a box that will kill one person they don't know, they will get a million dollars. After some contemplation, the couple goes ahead and pushes the button. The man tells them that they will indeed get the money. And somewhere, sometime, another couple will get the same box, and the same offer...