The tone of science fictionfilms is often a guide to the tone of the times the film was made: other worlds and species are viewed in turn as wonderful, terrifying, threatening, incomprehensible, and childishly benign.
... out of which 38.6% have children under the age of 18 living with them, 74.5% are married couples living together, 8.3% have a female householder with no husband ...