Have you ever wondered why there are so many stories about time travel, and why it is so fascinating to so many people? I know there are some people who are not interested in the idea and its multifaceted conundrums, but there are quite a few people who are drawn to it who do not even like science fiction (and the number of "time travel" movies that are not truly "sci-fi" proves it).
It is either the idea of being able to escape from one's current situation, or it is the idea of being able to fix something (usually in the past, but sometimes in the future); one of them is appealing to the human feeling of weakness and helplessness. So whether you like "time travel" stories or not, you probably find it at least interesting to be able to step into another time for some reason.
In the Catholic faith there is "time travel"; both in the past and the future. All Catholics travel into the past at every Mass. The sacrifice of Christ on Mount Calvary is brought into the present in a way that is even more powerful than if we had been there for the actual event. Also, those who are living in a state of grace are said already to have "eternal life".
The idea of being in "another" time is not new to modern sci-fi; it is just that the Church has never seen it as mere entertainment or as a wishful thinking fantasy. The Church sees time travel as absolutely necessary for salvation. Christ is the "beginning and the end" (at the same time!) and that means that He is constantly above and beyond time; He is the Lord of time (Who actually created time on that first week of creation). To use our modern terminology, Catholic theology says that we must travel into the past in order to travel into the future. Cool.