I couldn't make my top 10 sci-fi list without, at least initially, including The Twilight Zone. I will grant that some of the episodes are duds. I will also grant that, given that it is only ranked 10th and would seemingly never rise up the ranks, it probably won't stay on the top 10 forever. But I will also declare that I enjoy most Twilight Zone episodes. I like the black and white simplicity mixed with mystery. Some of the episodes even teach very good lessons and are useful teaching illustrations.