Part of the production was filmed on location at Norton Air Force Base in San Bernardino, California.

The vintage 1918 Nieuport 28 biplane was both owned and flown by Frank Gifford Tallman, and had previously appeared in many World War I motion pictures.

[1] Witness Flight Lieutenant William Terrance Decker, Royal Flying Corps, returning from a patrol somewhere over France.

Lieutenant Decker will soon discover that a man can be lost not only in terms of maps and miles, but also in time—and time in this case can be measured in eternities.Flight Lieutenant William Terrance "Terry" Decker of 56 Squadron Royal Flying Corps lands his Nieuport biplane on an American airbase in France after flying through a strange cloud.

Decker learns that his flying partner, Alexander Mackaye, is an air vice-marshal and a hero in World War II who saved hundreds, if not thousands, of lives by shooting down three German bombers over London one night during the Blitz.

Decker refers to Mackaye by a private nickname, "Old Leadbottom", explaining that at one point, he was shot in an embarrassing spot by German infantry.

Decker finally confesses that he is a coward who avoided combat throughout his service, and that he deliberately abandoned Mackaye when the two were attacked by a flight of German fighters.

Rod Serling had previously adapted the episodes "And When the Sky Was Opened" and "Third from the Sun" from short stories of Matheson's.

According to Grams' book The Twilight Zone: Unlocking the Door to a Television Classic, Serling himself was so concerned about the similarities that he attempted to buy the rights to the Quiet, Please episode to avoid any potential copyright infringement.