Science fiction is a genre that, by definition, seems to be both a product and a catalyst of secularization, due to its orientation towards scientific and technological progress. However, since its inception, the genre has been associated with esoteric and occult ideas. In recent decades, science fiction has explicitly or implicitly favoured transhumanist and post-humanist theories, developing visions and narratives of the future that aim at a fundamentally different world of thought and life. On closer inspection, however, these fantasies reveal striking analogies to religious - including biblical and especially apocalyptic - promises of salvation. Using a number of examples from literature and theory, the lecture will show how religious patterns and post-secular thinking are currently being hijacked, translated, transformed, and put into action in a diction that purports to be scientific.