Here is a slightly new twist on the continuing idea that there are alien races that hunt others for sport. A being, a Tosk, has had his ship disabled and is brought into the space station. He is secretive and while he develops a relationship with O'Brien, he doesn't reveal his role. What happens seems cruel to reasonable beings. But there are options. Miles does a good job of balancing the Prime Directive and the realities of the situation. This basic plot will be reprised in Star Trek: Voyager.