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