These are the hottest characters in science fiction. Whether it be science fiction TV shows, or science fiction movies, these characters are the hottest of the hot... and many of them aren't even human! Many of the sexiest scifi characters also include aliens, robots, or other forms of hot scifi babes. While there have been hundreds of sexy science fiction characters in TV and movies, this list has it whittled down to the top 20 sexiest characters in scifi for your ranking pleasure.Make your nerd voice heard and vote for your favorite among the 20 hottest science fiction characters. There really isn't a right or wrong answer here. It's all personal preference. Human? Alien? Machine? Vote up your who you think is the absolute hottest!