Science fiction, fantasy and everything in between. See What If for categories of things that are speculated on. On television, series in this category traditionally have been destined for either cult status or a very short run, with a couple very notable exceptions. See the Analysis page for why the boundary between Fantasy, Science Fiction, and Horror is fuzzy, and why a broad term like Speculative Fiction is necessary. Naturally it has its own page devoted to Speculative Fiction Tropes. See the Speculative Fiction Creator Index for a list of pages for Speculative Fiction creators.