Douglas Heyes replaced the original short story's motionless car-race with a beauty pageant, displeasing story-writer Charles Beaumont - although, the pageant is considered the most memorable part of the episode.
The background noises heard aboard the ship in the first scene were later reused in Star Trek (1966). They were previously heard in the final scene of Third from the Sun (1960).
The title "Elegy" refers to a song or poem expressing sorrow for one who has died.
The house front that the astronauts walk into with Mr. Wickwire is the famous "Meet Me in St. Louis (1944)" set on MGM's backlot No.3. The whole street, and occasionally this very house, would be used many times for the 30 years that it stood. Rod Serling would return here in another episode: "Walking Distance (1959)." This episode also uses the Waterloo Bridge set on backlot No. 2. The bridge can be spotted many times over the years being used for parts of everything from city parks to medieval castles.
The flashing dials in the spaceship seen right after landing are the same ones used in Forbidden Planet (1956).