Related Clues:

• Ridley Scott film
• Saucer user
• 'The War of the Worlds' invader
• He's out of this world
• It led to sequels for Sigourney
• ''X-Files'' character
• Many a 'Star Trek' character
• Sci-fi being
• Non-national
• Completely strange
• Critter from Mars
• "The War of the Worlds" foe
• Stranger from a strange land?
• Sci-fi film with a gut-busting scene?
• Stranger from a strange land