During World War II, Allied airmen called the phenomena "Foo Fighters" and thought that the Germans created them and the German pilots thought the Americans created them as the glowing balls of light followed planes randomly.
Doctor Hynek's personal car is a 1950 Canadian Ford called a Meteor. The Meteor looks much like a U.S. 1950 Ford with a different grill and trim.
"Dragnet" debuted as a radio program on June 3, 1949. It premiered on television on December 16, 1951.
The stiletto high heel shoes that Susie Miller (Ksenia Solo) wears were invented by Roger Vivier, shoe designer for Christian Dior, in 1954.
Mimi's neighbor mentions Dragnet and "that Jack Webb". Jack Webb produced Project UFO that ran for two seasons in 1978-79. Project UFO, like this program, was also based on the Air Force investigation of sightings and contact with UFOs and their occupants.