Possible Clues:

• Xenomorphs, e.g
• The Na'vi in "Avatar," for one
• UFO fliers
• Klingons, for one
• Klingons or Vulcans, e.g.
• Vulcans, e.g.
• ... for a xenophobic couch potato?
• * Non-earthlings
• Romulans or Klingons
• Fauxlympics event for Klingons?