Normally, theology and science-fiction don't go together. Most science-fiction shows ignore theology all-together, and others make a token mention once in a blue moon (aka Star Trek). Almost never do the two realms intersect.
Except with Babylon 5. I still think this television show/movies/novels is the best science-fiction ever produced. The show did not focus on theology, but theology and morality often came up in the episodes. Case in point, this is the only science-fiction show I have seen that actually mentions Christianity and the Church, and when they are mentioned it is not in a sarcastically critical mode.
Another case in point: the newly released for DVD movie "Babylon 5: The Lost Tales" has two short stories set ten years after the final episode. The first short story deals with Church, theology, and evil. The topics were wonderfully explored as the issue was delved into: What would be the result for Christianity if humans went travelling to the stars and did not find God, but numerous alien races each with their own concepts of God? And what is really going on when a Roman Catholic priest is brought to the space station "Babylon 5" to exorcise a demon-possessed man?
Babylon 5 again shows why it is the pinnacle of science-fiction. When theology and God are brought up, they are treated reverently and thoughtfully. While certainly not a primer for catechesis, "Babylon 5" nonetheless helps the viewer engage in serious theological, philosophical, and moral questions, questions which 99% of science-fiction pass right over in favor of action. Babylon 5 has plenty of action, and plenty of meditation on issues relevant for us in the 21st century.