The Outer Limits: "Patient Zero"

In this episode, a group of scientists, who are among the last few people alive in the world, create a way to time travel so they can go back in time to stop the plague that killed most of the earth, from ever happening. They send a man named Colonel Beckett back to kill 'patient zero'. But when they give him the picture of the woman who is 'patient zero' you can tell that this is going to be a problem for him, which is going to create a bigger problem. So he goes back in time. He is following the woman when he gets hit by a car. She then helps him, and takes him to her apartment. He becomes attached to her and cannot kill her. So he is determined to just prevent her from coming in contact with the strands of DNA that will cause her to get the disease. But by doing this he accidentally becomes patient zero himself. Another soldier then has to come back in time and kill Beckett. Then time is changed and the plague had never happened. And everyone was alive again. I don't think there was really any different ideas about time travel in this episode, it just kind of went along with the regular ideas. And the reason they time traveled was a regular reason, which was to stop something really bad from happening. Although, it was different because they actually could change time, unlike a lot of other time travel things.