Warren Stevens played an alien who didn't understand emotions in the Star Trek (1966) episode By Any Other Name (1968).
The same gates used for the facility entry were used at the beginning of "Demon With The Glass Hand."
To this day, no one can remember how the title of this episode relates to the story.
Dramatic music lifted from the film "Earth vs The Flying Saucers" is used during this episode (e.g., in the scene where Prof. Eric Plummer speeds along the desert road in the dark).