Related Clues:

• "V" visitors, e.g.
• Area 51 visitors, perhaps
• Science-fiction characters
• Sci-fi invaders, for short
• Roswell crashers, in brief
• Co. that administers the GRE
• TV's Alf and others
• Beings from another planet
• UFO sightings
• UFO's crew
• Martians and Venusians
• "Avatar" extras
• Sci-fi travelers
• Creatures from another planet
• Life-forms assumed to exist beyond Earth