On the extras one of the creators says that a neighbor he knew growing up who had a high-level job in government told him that, yes, extraterrestrials were real and were already here.
Of course, the Hollywood guy could have been lying, or the neighbor could have been pulling his leg, but apparently there are people in government who actually believe this stuff.
A lot of people believe the Rockefellers rule the world and Laurence Rockefeller spent his last years obsessed with ... aliens or extraterrestrials. Of course he claimed only to be interested, but still, of all the things to worry about when you have millions at your disposal.
FWIW, J.D. Walsh, co-star of Dark Skies died 15 years ago (of a heart attack while having a "spiritual detox"), a little while after the series was cancelled. Pity. Too soon. Would have liked to see more from him.
The Purif?