possible answer for the
clue Unseen observer
which appears 3 times in our database.
An invisible observer of an event
Wish you were there to hear pilot on the screen?
Any left who'll get worried by inconspicuous observer?
Bug in room for secret observation?
Last Seen In:
Nov 01, 2001 - Times2 Concise 2488 - November 1, 2001
Sep 24, 2013 - The Guardian - Quick
May 06, 2011 - Newsday.com