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Related Clues:
- Klingons, e.g.
- Roswell visitors?
- S.A.T. org.
- 'Star Wars' walk-ons
- 'The X-Files' extras, briefly
- 'The X-Files' extras
- S.A.T. administrator
- Venusians, e.g.
- UFO passengers
- They can cover a lot of space
- Space invaders
- Visitors to Earth, for short
- Aliens, for short
- Latin connections
- They cover a lot of space?