Last night I watched a repeat of the repeat of the repeat (and so on) of Star Trek Next Generations on Sky 1, the episode was called "First Contact".
I recall a while ago reading in some notable publication that some people believe that aliens are already here on earth, living and working and gathering information, in preperation for First Contact.
Sebastian Coe is thought to be one of these aliens.
Have you heard about others? How can you tell? Do you know one?