Related Clues:

• Worf or Troi, e.g.
• Weaver's work
• Ufologist's study
• UFO passenger
• Klingon, e.g.
• Sci-fi villain
• Noncitizen
• 42-Across, for one
• Visitor from afar
• Exotic
• Man from Mars
• Lacking citizenship
• Not native
• "Men in Black" menace
• Tabloid abductor