In the wake of terrorist acts, or school shootings, or other horrific acts of violence, we feel duped. How could we have missed the signs? Or have been susceptible? We remind ourselves to be vigilant. Be suspicious.
In 1956's "Invasion of the Body Snatchers," a mannequin-like figure mysteriously appears on a billiards table, a half-formed thing without hair, face or fingerprints. Meanwhile, a woman insists that her uncle isn't her uncle, but an imposter who looks just like him; husbands say the same of their wives and children of their parents.