Given this, we should expect to find many of our own world present, in metaphorical forms, in the science-fiction we watch and read. The article notes how Doctor Who has addressed the topic of religion throughout the years, sometimes ambiguously, sometimes more directly. Like most science-fiction, the series never affirms the existence of God, and at best will usually leave such questions open. It presents us with some "possible futures" of religion, complete with strangely militarized clergy, odd rituals, and any manner of creepy aliens. But what is most interesting is not how it is presented then, but what it tells us about our cultural beliefs now.
Modern Christians are not often good readers of our time. I've heard it said that the Church usually imbibes cultural trends, but usually a few years too late. Perhaps in contrast, science-fiction often channels ideas about our own time very effectively. As the article mentions, Doctor Who presents religion in a way that is analogous to the state of religion in the current day United Kingdom, and probably the United States as well. It does this in a way that recognizes the complexities and diversities of current spirituality, and the relativism required of us that is a practical reality even if not an actual one. It allows us to explore religious ideas, even while being ambiguous enough to leave room for the faithful Christian right next to the atheist. The best science-fiction, in other words, reads our society well, and gives us a laboratory for testing out ideas, and for understanding our own times better. It is a window we do well to look through.