Related Clues:
- 'Independence Day' villains
- Bug-eyed monsters
- Little green men
- 24-Across and others
- They make contact in 'Contact'
- Uranians, e.g.
- 1986 sci-fi hit
- U.F.O. crew
- Non-earthlings, briefly
- Frequent 24-Down subject
- Martians and Venusians, for short
- Orly connections?
- 'The X-Files' subject
- Many Trekkie costumes
- Subjects for special fx artists