Hurd Hatfield plays in this story a character very close to the one who made him world wide know: The Picture Of Dorian Gray.
The portrait of Caroline Day is actually a portrait of Harriet West(later Mrs William Woodgate) by Sir Thomas Lawrence completed 1824-1825.
At around the 22 minute mark as they show Hurd Hatfield as a younger man a variation on the Twilight Zone theme can be heard.
This episode is centered around the Beaumont, Texas area, a city located 86 miles east of Houston, Texas and about 22 miles west of the Louisiana state line. In the 1870s Beaumont would have had a population around 2,500.