What separates one tv show or episode from another is innovation. How many "Twilight Zone" copies have been made? But the original had this knack to take you along a path, and then surprise you at the end. While this episode is awesome overall, it is the last couple of minutes that surprise the viewer in an almsst M. Night Shyamalan fashion (the director of "The Sixth Sense" and "Unbreakable). In fact, M. Night may have taken some of his style from the "Twilight Zone".
What an awesome play on words this episode presented, and while the viewer knew from the beginning that it would end badly for humanity, many did not suspect or expect the ending and how it would happen. It took viewers by surprise, and even holds up today. Great storytelling is the key to good television, and this episode is one of the series finests.
In the new "Twilight Zone," they did a similar take off on it and while the surprise element was not there because it was a remake, the play on words was just a little better ("A Little Thing for War"). Even though this one came first, the fact that they did a clever remake, made me take out some points in the overall review, but still almost perfection.