Related Clues:
- Sci-fi visitor
- Foreigner
- Not from Earth
- Hardly ordinary
- Like some dancers
- Not terrestrial, perhaps
- Sci-fi film extra
- Type of dancer
- An American in Paris, e.g.
- Not terrestrial
- Not natural
- Xenophobe's fear
- With 27-Down, sci-fi phenomena that help explain this puzzle's theme
- Border crosser
- 1979 sci-fi thriller