The story was originally designed for the Star Trek II television series in 1977.
	In the 1977 version, a demonstrative Captain Kirk fast talks planet Neuterr out of falling for an impostor's scam, exposing the "devil" as merely the mental energy of a surviving planetary elder and his original fellow council members. (source - Star Trek TNG Companion).
	Actresses Stella Stevens and Adrienne Barbeau were both considered for the Adra role.
	Marta DuBois was Magnum's estranged wife on "Magnus P.I.".
	Paul Lambert (Dr. Clarke) played the Aldean Melian in "When the Bough Breaks".
	Avoiding contradicting classic Trek's "Day of the Dove" which states the Klingons have no devil, Fek'lhr is carefully described as the guardian of Gre'thor, where dishonored Klingons go.

If you have some more behind the scenes information, send it in.