SCI-FI REGULAR is a term used to describe an actor or actress who appears in multiple science fiction films or television shows. The crossword solution for this term is ALIEN, which refers to any creature from outer space that is not human. This term is often used to describe characters in science fiction stories, such as extraterrestrials, robots, and other creatures. Sci-fi regulars are actors or actresses who appear in multiple science fiction films or television shows, often playing the same character.